Merge pull request #1789 from LLK/hotfix/es6-upgrade

[Master] Upgrade to ES6, Take II

.babelrc

@@ -0,0 +1,3 @@
+{
+    "presets": ["es2015", "react"],
+}

.eslintrc

@@ -1,29 +0,0 @@
-{
-    "parser": "babel-eslint",
-    "rules": {
-        "curly": [2, "multi-line"],
-        "eol-last": [2],
-        "indent": [2, 4],
-        "linebreak-style": [2, "unix"],
-        "max-len": [2, 120, 4, {"ignoreUrls": true}],
-        "no-trailing-spaces": [2, { "skipBlankLines": true }],
-        "no-unused-vars": [2, {"args": "after-used", "varsIgnorePattern": "^_"}],
-        "quotes": [2, "single"],
-        "semi": [2, "always"],
-        "space-before-function-paren": [2, "always"],
-        "strict": [2, "never"]
-    },
-    "env": {
-        "browser": true,
-        "es6": true,
-        "node": true
-    },
-    "globals": {
-        "formatMessage": true
-    },
-    "plugins": [
-        "react",
-        "json"
-    ],
-    "extends": "eslint:recommended"
-}

.eslintrc.js

@@ -0,0 +1,4 @@
+module.exports = {
+    extends: ['scratch', 'scratch/node'],
+    plugins: ['json']
+};

.tx/config

@@ -133,3 +133,9 @@ file_filter = localizations/conference-index/<lang>.json
 source_file = src/views/conference/2018/index/l10n.json
 source_lang = en
 type = KEYVALUEJSON
+
+[scratch-website.preview-faq-l10njson]
+file_filter = localizations/preview-faq/<lang>.json
+source_file = src/views/preview-faq/l10n.json
+source_lang = en
+type = KEYVALUEJSON

bin/configure-fastly.js

@@ -3,7 +3,7 @@ var defaults = require('lodash.defaults');
 var fastlyConfig = require('./lib/fastly-config-methods');
 const languages = require('../languages.json');
 
-var route_json = require('../src/routes.json');
+var routeJson = require('../src/routes.json');
 
 const FASTLY_SERVICE_ID = process.env.FASTLY_SERVICE_ID || '';
 const S3_BUCKET_NAME = process.env.S3_BUCKET_NAME || '';
@@ -15,10 +15,10 @@ var extraAppRoutes = [
     // TODO: Should this be added for every route?
     '/\\?',
     // View html
-    '/[^\/]*\.html$'
+    '/[^/]*.html$'
 ];
 
-var routes = route_json.map(function (route) {
+var routes = routeJson.map(function (route) {
     return defaults({}, {pattern: fastlyConfig.expressPatternToRegex(route.pattern)}, route);
 });
 
@@ -28,9 +28,9 @@ async.auto({
             if (err) return cb(err);
             // Validate latest version before continuing
             if (response.active || response.locked) {
-                fastly.cloneVersion(response.number, function (err, response) {
-                    if (err) return cb('Failed to clone latest version: ' + err);
-                    cb(null, response.number);
+                fastly.cloneVersion(response.number, function (e, resp) {
+                    if (e) return cb('Failed to clone latest version: ' + e);
+                    cb(null, resp.number);
                 });
             } else {
                 cb(null, response.number);
@@ -46,11 +46,11 @@ async.auto({
         var recvCondition = '' +
             'if (' + notPassStatement + ') {\n' +
             '    set req.backend = F_s3;\n' +
-            '    set req.http.host = \"' + S3_BUCKET_NAME + '\";\n' +
+            '    set req.http.host = "' + S3_BUCKET_NAME + '";\n' +
             '} else {\n' +
             '    if (!req.http.Fastly-FF) {\n' +
             '        if (req.http.X-Forwarded-For) {\n' +
-            '            set req.http.Fastly-Temp-XFF = req.http.X-Forwarded-For \", \" client.ip;\n' +
+            '            set req.http.Fastly-Temp-XFF = req.http.X-Forwarded-For ", " client.ip;\n' +
             '        } else {\n' +
             '            set req.http.Fastly-Temp-XFF = client.ip;\n' +
             '        }\n' +
@@ -171,20 +171,19 @@ async.auto({
             if (err) return cb(err);
             cb(null, headers);
         });
-    }]},
-    function (err, results) {
+    }]
+}, function (err, results) {
     if (err) throw new Error(err);
     if (process.env.FASTLY_ACTIVATE_CHANGES) {
-            fastly.activateVersion(results.version, function (err, response) {
-                if (err) throw new Error(err);
-                process.stdout.write('Successfully configured and activated version ' + response.number + '\n');
+        fastly.activateVersion(results.version, function (e, resp) {
+            if (err) throw new Error(e);
+            process.stdout.write('Successfully configured and activated version ' + resp.number + '\n');
             if (process.env.FASTLY_PURGE_ALL) {
-                    fastly.purgeAll(FASTLY_SERVICE_ID, function (err) {
-                        if (err) throw new Error(err);
+                fastly.purgeAll(FASTLY_SERVICE_ID, function (error) {
+                    if (error) throw new Error(error);
                     process.stdout.write('Purged all.\n');
                 });
             }
         });
     }
-    }
-);
+});

bin/lib/fastly-config-methods.js

@@ -24,9 +24,9 @@ var FastlyConfigMethods = {
      */
     getViewPaths: function (routes) {
         return routes.reduce(function (paths, route) {
-            var path = route.routeAlias || route.pattern;
-            if (paths.indexOf(path) === -1) {
-                paths.push(path);
+            var p = route.routeAlias || route.pattern;
+            if (paths.indexOf(p) === -1) {
+                paths.push(p);
             }
             return paths;
         }, []);
@@ -39,7 +39,7 @@ var FastlyConfigMethods = {
      * 2. /path/:arg([regex]) – :arg is removed, leaving just /path/([regex])
      */
     expressPatternToRegex: function (pattern) {
-        pattern = pattern.replace(/(:\w+)(\([^\)]+\))/gi, '$2');
+        pattern = pattern.replace(/(:\w+)(\([^)]+\))/gi, '$2');
         return pattern.replace(/(:\w+)/gi, '.+?');
     },
 
@@ -84,7 +84,7 @@ var FastlyConfigMethods = {
         return 'redirects/' + route.pattern;
     },
 
-    /**
+    /*
      * Returns custom vcl configuration as a string that sets the varnish
      * Time to Live (TTL) for responses that come from s3.
      *

bin/lib/fastly-extended.js

@@ -19,8 +19,8 @@ module.exports = function (apiKey, serviceId) {
      *
      * @return {string}
      */
-    fastly.getFastlyAPIPrefix = function (serviceId, version) {
-        return '/service/' + encodeURIComponent(serviceId) + '/version/' + version;
+    fastly.getFastlyAPIPrefix = function (servId, version) {
+        return '/service/' + encodeURIComponent(servId) + '/version/' + version;
     };
 
     /*
@@ -32,15 +32,15 @@ module.exports = function (apiKey, serviceId) {
         if (!this.serviceId) {
             return cb('Failed to get latest version. No serviceId configured');
         }
-        var url = '/service/'+ encodeURIComponent(this.serviceId) +'/version';
+        var url = '/service/' + encodeURIComponent(this.serviceId) + '/version';
         this.request('GET', url, function (err, versions) {
             if (err) {
                 return cb('Failed to fetch versions: ' + err);
             }
-            var latestVersion = versions.reduce(function (latestVersion, version) {
-                if (!latestVersion) return version;
-                if (version.number > latestVersion.number) return version;
-                return latestVersion;
+            var latestVersion = versions.reduce(function (lateVersion, version) {
+                if (!lateVersion) return version;
+                if (version.number > lateVersion.number) return version;
+                return lateVersion;
             });
             return cb(null, latestVersion);
         });
@@ -63,16 +63,16 @@ module.exports = function (apiKey, serviceId) {
         var postUrl = this.getFastlyAPIPrefix(this.serviceId, version) + '/condition';
         return this.request('PUT', putUrl, condition, function (err, response) {
             if (err && err.statusCode === 404) {
-                this.request('POST', postUrl, condition, function (err, response) {
-                    if (err) {
-                        return cb('Failed while inserting condition \"' + condition.statement + '\": ' + err);
+                this.request('POST', postUrl, condition, function (e, resp) {
+                    if (e) {
+                        return cb('Failed while inserting condition "' + condition.statement + '": ' + e);
                     }
-                    return cb(null, response);
+                    return cb(null, resp);
                 });
                 return;
             }
             if (err) {
-                return cb('Failed to update condition \"' + condition.statement + '\": ' + err);
+                return cb('Failed to update condition "' + condition.statement + '": ' + err);
             }
             return cb(null, response);
         }.bind(this));
@@ -95,11 +95,11 @@ module.exports = function (apiKey, serviceId) {
         var postUrl = this.getFastlyAPIPrefix(this.serviceId, version) + '/header';
         return this.request('PUT', putUrl, header, function (err, response) {
             if (err && err.statusCode === 404) {
-                this.request('POST', postUrl, header, function (err, response) {
-                    if (err) {
-                        return cb('Failed to insert header: ' + err);
+                this.request('POST', postUrl, header, function (e, resp) {
+                    if (e) {
+                        return cb('Failed to insert header: ' + e);
                     }
-                    return cb(null, response);
+                    return cb(null, resp);
                 });
                 return;
             }
@@ -127,11 +127,11 @@ module.exports = function (apiKey, serviceId) {
         var postUrl = this.getFastlyAPIPrefix(this.serviceId, version) + '/response_object';
         return this.request('PUT', putUrl, responseObj, function (err, response) {
             if (err && err.statusCode === 404) {
-                this.request('POST', postUrl, responseObj, function (err, response) {
-                    if (err) {
-                        return cb('Failed to insert response object: ' + err);
+                this.request('POST', postUrl, responseObj, function (e, resp) {
+                    if (e) {
+                        return cb('Failed to insert response object: ' + e);
                     }
-                    return cb(null, response);
+                    return cb(null, resp);
                 });
                 return;
             }
@@ -166,7 +166,7 @@ module.exports = function (apiKey, serviceId) {
         this.request('PUT', url, cb);
     };
 
-    /**
+    /*
      * Upsert a custom vcl file. Attempts a PUT, and falls back
      * to POST if not there already.
      *
@@ -186,16 +186,16 @@ module.exports = function (apiKey, serviceId) {
         return this.request('PUT', url, content, function (err, response) {
             if (err && err.statusCode === 404) {
                 content.name = name;
-                this.request('POST', postUrl, content, function (err, response) {
-                    if (err) {
-                        return cb('Failed while adding custom vcl \"' + name + '\": ' + err);
+                this.request('POST', postUrl, content, function (e, resp) {
+                    if (e) {
+                        return cb('Failed while adding custom vcl "' + name + '": ' + e);
                     }
-                    return cb(null, response);
+                    return cb(null, resp);
                 });
                 return;
             }
             if (err) {
-                return cb('Failed to update custom vcl \"' + name + '\": ' + err);
+                return cb('Failed to update custom vcl "' + name + '": ' + err);
             }
             return cb(null, response);
         }.bind(this));

dev-server/handler.js

@@ -1,10 +1,12 @@
-/**
+/*
  * Constructor
  */
-function Handler (route) {
+const Handler = function (route) {
     // Handle redirects
     if (route.redirect) {
-        return (req, res) => { res.redirect(route.redirect); };
+        return (req, res) => {
+            res.redirect(route.redirect);
+        };
     }
 
     var url = '/' + route.name + '.html';
@@ -12,9 +14,9 @@ function Handler (route) {
         req.url = url;
         next();
     };
-}
+};
 
-/**
+/*
  * Export a new instance
  */
 module.exports = function (route) {

languages.json

@@ -1,4 +1,5 @@
 {
+    "ab": "Аҧсшәа",
     "ar": "العربية",
     "an": "Aragonés",
     "ast": "Asturianu",

package.json

@@ -33,24 +33,27 @@
   "devDependencies": {
     "async": "1.5.2",
     "autoprefixer": "6.3.6",
-    "babel-core": "6.10.4",
-    "babel-eslint": "5.0.4",
-    "babel-loader": "6.2.4",
-    "babel-preset-es2015": "6.9.0",
-    "babel-preset-react": "6.11.1",
+    "babel-cli": "6.26.0",
+    "babel-core": "6.23.1",
+    "babel-eslint": "8.0.2",
+    "babel-loader": "7.1.0",
+    "babel-preset-es2015": "6.22.0",
+    "babel-preset-react": "6.22.0",
     "cheerio": "1.0.0-rc.2",
-    "classnames": "2.1.3",
+    "classnames": "2.2.5",
     "cookie": "0.2.2",
     "copy-webpack-plugin": "0.2.0",
+    "create-react-class": "15.6.2",
     "css-loader": "0.23.1",
-    "eslint": "1.3.1",
+    "eslint": "4.7.1",
+    "eslint-config-scratch": "5.0.0",
     "eslint-plugin-json": "1.2.0",
-    "eslint-plugin-react": "3.3.1",
+    "eslint-plugin-react": "7.4.0",
     "exenv": "1.2.0",
     "fastly": "1.2.1",
     "file-loader": "0.8.4",
-    "formsy-react": "0.18.0",
-    "formsy-react-components": "0.7.1",
+    "formsy-react": "0.19.5",
+    "formsy-react-components": "0.11.1",
     "git-bundle-sha": "0.0.2",
     "glob": "5.0.15",
     "google-libphonenumber": "1.0.21",
@@ -59,6 +62,7 @@
     "json-loader": "0.5.2",
     "json2po-stream": "1.0.3",
     "keymirror": "0.1.1",
+    "lodash.bindall": "4.4.0",
     "lodash.clone": "3.0.3",
     "lodash.defaultsdeep": "3.10.0",
     "lodash.isarray": "3.0.4",
@@ -70,21 +74,22 @@
     "node-sass": "4.6.1",
     "pako": "0.2.8",
     "po2icu": "0.0.2",
-    "postcss-loader": "0.8.2",
+    "postcss-loader": "2.0.10",
+    "prop-types": "15.6.0",
     "raven-js": "3.0.4",
-    "react": "15.1.0",
-    "react-dom": "15.0.1",
+    "react": "15.5.4",
+    "react-dom": "15.5.4",
     "react-intl": "2.1.2",
-    "react-modal": "1.5.2",
-    "react-onclickoutside": "4.1.1",
+    "react-modal": "3.1.11",
+    "react-onclickoutside": "6.7.1",
     "react-redux": "4.4.5",
-    "react-responsive": "1.1.4",
+    "react-responsive": "3.0.0",
     "react-slick": "0.12.2",
-    "react-telephone-input": "3.4.5",
+    "react-telephone-input": "3.8.6",
     "redux": "3.5.2",
     "redux-thunk": "2.0.1",
     "sass-lint": "1.5.1",
-    "sass-loader": "2.0.1",
+    "sass-loader": "6.0.6",
     "scratchr2_translations": "git://github.com/LLK/scratchr2_translations.git#master",
     "slick-carousel": "1.5.8",
     "source-map-support": "0.3.2",
@@ -92,8 +97,8 @@
     "tap": "7.1.2",
     "url-loader": "0.5.6",
     "watch": "0.16.0",
-    "webpack": "1.12.14",
-    "webpack-dev-middleware": "1.2.0",
+    "webpack": "2.7.0",
+    "webpack-dev-middleware": "2.0.4",
     "xhr": "2.2.0"
   },
   "nyc": {

src/.eslintrc.js

@@ -0,0 +1,11 @@
+module.exports = {
+    root: true,
+    extends: ['scratch', 'scratch/es6', 'scratch/react'],
+    env: {
+        browser: true
+    },
+    globals: {
+        process: true
+    },
+    plugins: ['json']
+};

src/components/accordion/accordion.jsx

@@ -1,33 +1,35 @@
-var classNames = require('classnames');
-var React = require('react');
+const bindAll = require('lodash.bindall');
+const classNames = require('classnames');
+const PropTypes = require('prop-types');
+const React = require('react');
 
 require('./accordion.scss');
 
-var Accordion = React.createClass({
-    type: 'Accordion',
-    getDefaultProps: function () {
-        return {
-            titleAs: 'div',
-            contentAs: 'div'
-        };
-    },
-    getInitialState: function () {
-        return {
+class Accordion extends React.Component {
+    constructor (props) {
+        super(props);
+        bindAll(this, [
+            'handleClick'
+        ]);
+        this.state = {
             isOpen: false
         };
-    },
-    toggleContent: function () {
+    }
+    handleClick (e) {
+        e.preventDefault();
         this.setState({isOpen: !this.state.isOpen});
-    },
-    render: function () {
-        var classes = classNames({
-            'content': true,
-            'open': this.state.isOpen
+    }
+    render () {
+        const classes = classNames({
+            content: true,
+            open: this.state.isOpen
         });
         return (
             <div className="accordion">
-                <this.props.titleAs className="title"
-                     onClick={this.toggleContent}>
+                <this.props.titleAs
+                    className="title"
+                    onClick={this.handleClick}
+                >
                     {this.props.title}
                 </this.props.titleAs>
                 <this.props.contentAs className={classes}>
@@ -36,6 +38,16 @@ var Accordion = React.createClass({
             </div>
         );
     }
-});
+}
+
+Accordion.propTypes = {
+    content: PropTypes.node,
+    title: PropTypes.string
+};
+
+Accordion.defaultProps = {
+    contentAs: 'div',
+    titleAs: 'div'
+};
 
 module.exports = Accordion;

src/components/adminpanel/adminpanel.jsx

@@ -1,37 +1,39 @@
-var React = require('react');
-var connect = require('react-redux').connect;
+const bindAll = require('lodash.bindall');
+const connect = require('react-redux').connect;
+const PropTypes = require('prop-types');
+const React = require('react');
 
-var Button = require('../forms/button.jsx');
+const Button = require('../forms/button.jsx');
 
 require('./adminpanel.scss');
 
-var AdminPanel = React.createClass({
-    type: 'AdminPanel',
-    getInitialState: function () {
-        return {
+class AdminPanel extends React.Component {
+    constructor (props) {
+        super(props);
+        bindAll(this, [
+            'handleToggleVisibility'
+        ]);
+        this.state = {
             showPanel: false
         };
-    },
-    handleToggleVisibility: function (e) {
+    }
+    handleToggleVisibility (e) {
         e.preventDefault();
         this.setState({showPanel: !this.state.showPanel});
-    },
-    render: function () {
-        // make sure user is present before checking if they're an admin. Don't show anything if user not an admin.
-        var showAdmin = false;
-        if (this.props.session.session.user) {
-            showAdmin = this.props.session.session.permissions.admin;
     }
-
-        if (!showAdmin) return false;
+    render () {
+        if (!this.props.isAdmin) return false;
 
         if (this.state.showPanel) {
             return (
-                <div id="admin-panel" className="visible">
+                <div
+                    className="visible"
+                    id="admin-panel"
+                >
                     <span
                         className="toggle"
-                        onClick={this.handleToggleVisibility}>
-
+                        onClick={this.handleToggleVisibility}
+                    >
                         x
                     </span>
                     <div className="admin-header">
@@ -44,8 +46,15 @@ var AdminPanel = React.createClass({
                             <dd>
                                 <ul className="cache-list">
                                     <li>
-                                        <form method="post" action="/scratch_admin/page/clear-anon-cache/">
-                                            <input type="hidden" name="path" value="/" />
+                                        <form
+                                            action="/scratch_admin/page/clear-anon-cache/"
+                                            method="post"
+                                        >
+                                            <input
+                                                name="path"
+                                                type="hidden"
+                                                value="/"
+                                            />
                                             <div className="button-row">
                                                 <span>For anonymous users:</span>
                                                 <Button type="submit">
@@ -60,27 +69,32 @@ var AdminPanel = React.createClass({
                     </div>
                 </div>
             );
-        } else {
+        }
         return (
-                <div id="admin-panel" className="hidden">
+            <div
+                className="hidden"
+                id="admin-panel"
+            >
                 <span
                     className="toggle"
-                        onClick={this.handleToggleVisibility}>
-
+                    onClick={this.handleToggleVisibility}
+                >
                     &gt;
                 </span>
             </div>
         );
     }
-    }
-});
+}
 
-var mapStateToProps = function (state) {
-    return {
-        session: state.session
-    };
+AdminPanel.propTypes = {
+    children: PropTypes.node,
+    isAdmin: PropTypes.bool
 };
 
-var ConnectedAdminPanel = connect(mapStateToProps)(AdminPanel);
+const mapStateToProps = state => ({
+    isAdmin: state.permissions.admin
+});
+
+const ConnectedAdminPanel = connect(mapStateToProps)(AdminPanel);
 
 module.exports = ConnectedAdminPanel;

src/components/avatar/avatar.jsx

@@ -1,23 +1,22 @@
-var React = require('react');
-var classNames = require('classnames');
+const classNames = require('classnames');
+const omit = require('lodash.omit');
+const PropTypes = require('prop-types');
+const React = require('react');
 
-var Avatar = React.createClass({
-    type: 'Avatar',
-    propTypes: {
-        src: React.PropTypes.string
-    },
-    getDefaultProps: function () {
-        return {
+const Avatar = props => (
+    <img
+        className={classNames('avatar', props.className)}
+        {...omit(props, ['className'])}
+    />
+);
+
+Avatar.propTypes = {
+    className: PropTypes.string,
+    src: PropTypes.string
+};
+
+Avatar.defaultProps = {
     src: '//cdn2.scratch.mit.edu/get_image/user/2584924_24x24.png?v=1438702210.96'
-        };
-    },
-    render: function () {
-        var classes = classNames(
-            'avatar',
-            this.props.className
-        );
-        return <img {... this.props} className={classes} />;
-    }
-});
+};
 
 module.exports = Avatar;

src/components/box/box.jsx

@@ -1,40 +1,38 @@
-var classNames = require('classnames');
-var React = require('react');
+const classNames = require('classnames');
+const PropTypes = require('prop-types');
+const React = require('react');
 
 require('./box.scss');
 
-var Box = React.createClass({
-    type: 'Box',
-    propTypes: {
-        title: React.PropTypes.string.isRequired,
-        subtitle: React.PropTypes.string,
-        moreTitle: React.PropTypes.string,
-        moreHref: React.PropTypes.string,
-        moreProps: React.PropTypes.object
-    },
-    render: function () {
-        var classes = classNames(
-            'box',
-            this.props.className
-        );
-        return (
-            <div className={classes}>
+const Box = props => (
+    <div className={classNames('box', props.className)}>
         <div className="box-header">
-                    <h4>{this.props.title}</h4>
-                    <h5>{this.props.subtitle}</h5>
+            <h4>{props.title}</h4>
+            <h5>{props.subtitle}</h5>
             <p>
-                        <a href={this.props.moreHref} {...this.props.moreProps}>
-                            {this.props.moreTitle}
+                <a
+                    href={props.moreHref}
+                    {...props.moreProps}
+                >
+                    {props.moreTitle}
                 </a>
             </p>
         </div>
 
         <div className="box-content">
-                    {this.props.children}
+            {props.children}
         </div>
     </div>
-        );
-    }
-});
+);
+
+Box.propTypes = {
+    children: PropTypes.node,
+    className: PropTypes.string,
+    moreHref: PropTypes.string,
+    moreProps: PropTypes.object, // eslint-disable-line react/forbid-prop-types
+    moreTitle: PropTypes.string,
+    subtitle: PropTypes.string,
+    title: PropTypes.string.isRequired
+};
 
 module.exports = Box;

src/components/card/card.jsx

@@ -1,17 +1,18 @@
-var classNames = require('classnames');
-var React = require('react');
+const classNames = require('classnames');
+const PropTypes = require('prop-types');
+const React = require('react');
 
 require('./card.scss');
 
-var Card = React.createClass({
-    displayName: 'Card',
-    render: function () {
-        return (
-            <div className={classNames(['card', this.props.className])}>
-                {this.props.children}
+const Card = props => (
+    <div className={classNames(['card', props.className])}>
+        {props.children}
     </div>
-        );
-    }
-});
+);
+
+Card.propTypes = {
+    children: PropTypes.node,
+    className: PropTypes.string
+};
 
 module.exports = Card;

src/components/carousel/carousel.jsx

@@ -1,35 +1,19 @@
-var classNames = require('classnames');
-var defaults = require('lodash.defaults');
-var React = require('react');
-var Slider = require('react-slick');
+const classNames = require('classnames');
+const defaults = require('lodash.defaults');
+const PropTypes = require('prop-types');
+const React = require('react');
+const Slider = require('react-slick');
 
-var Thumbnail = require('../thumbnail/thumbnail.jsx');
+const Thumbnail = require('../thumbnail/thumbnail.jsx');
 
-var frameless = require('../../lib/frameless.js');
+const frameless = require('../../lib/frameless.js');
 
 require('slick-carousel/slick/slick.scss');
 require('slick-carousel/slick/slick-theme.scss');
 require('./carousel.scss');
 
-/**
- * Displays content in horizontal scrolling box. Example usage: splash page rows.
- */
-var Carousel = React.createClass({
-    type: 'Carousel',
-    propTypes: {
-        items: React.PropTypes.array
-    },
-    getDefaultProps: function () {
-        return {
-            items: require('./carousel.json'),
-            showRemixes: false,
-            showLoves: false,
-            type: 'project'
-        };
-    },
-    render: function () {
-        var settings = this.props.settings || {};
-        defaults(settings, {
+const Carousel = props => {
+    defaults(props.settings, {
         centerMode: false,
         dots: false,
         infinite: false,
@@ -38,58 +22,94 @@ var Carousel = React.createClass({
         slidesToScroll: 5,
         variableWidth: true,
         responsive: [
-                {breakpoint: frameless.mobile, settings: {
+            {
+                breakpoint: frameless.mobile,
+                settings: {
                     arrows: true,
                     slidesToScroll: 1,
                     slidesToShow: 1,
                     centerMode: true
-                }},
-                {breakpoint: frameless.tablet, settings: {
+                }
+            },
+            {
+                breakpoint: frameless.tablet,
+                settings: {
                     slidesToScroll: 2,
                     slidesToShow: 2
-                }},
-                {breakpoint: frameless.desktop, settings: {
+                }
+            },
+            {
+                breakpoint: frameless.desktop,
+                settings: {
                     slidesToScroll: 4,
                     slidesToShow: 4
-                }}
+                }
+            }
         ]
     });
-        var arrows = this.props.items.length > settings.slidesToShow;
-        var classes = classNames(
-            'carousel',
-            this.props.className
-        );
+    const arrows = props.items.length > props.settings.slidesToShow;
     return (
-            <Slider className={classes} arrows={arrows} {... settings}>
-                {this.props.items.map(function (item) {
-                    var href = '';
-                    switch (this.props.type) {
+        <Slider
+            arrows={arrows}
+            className={classNames('carousel', props.className)}
+            {... props.settings}
+        >
+            {props.items.map(item => {
+                let href = '';
+                switch (props.type) {
                 case 'gallery':
-                        href = '/studios/' + item.id + '/';
+                    href = `/studios/${item.id}/`;
                     break;
                 case 'project':
-                        href = '/projects/' + item.id + '/';
+                    href = `/projects/${item.id}/`;
                     break;
                 default:
-                        href = '/' + item.type + '/' + item.id + '/';
+                    href = `/${item.type}/${item.id}/`;
                 }
 
                 return (
-                        <Thumbnail key={[this.key, item.id].join('.')}
-                                   showLoves={this.props.showLoves}
-                                   showRemixes={this.props.showRemixes}
-                                   type={this.props.type}
-                                   href={href}
-                                   title={item.title}
-                                   src={item.image}
+                    <Thumbnail
                         creator={item.author.username}
+                        href={href}
+                        key={[props.type, item.id].join('.')}
+                        loves={item.stats.loves}
                         remixes={item.stats.remixes}
-                                   loves={item.stats.loves} />
+                        showLoves={props.showLoves}
+                        showRemixes={props.showRemixes}
+                        src={item.image}
+                        title={item.title}
+                        type={props.type}
+                    />
                 );
-                }.bind(this))}
+            })}
         </Slider>
     );
-    }
-});
+};
+
+Carousel.propTypes = {
+    className: PropTypes.string,
+    items: PropTypes.arrayOf(PropTypes.any),
+    settings: PropTypes.shape({
+        centerMode: PropTypes.bool,
+        dots: PropTypes.bool,
+        infinite: PropTypes.bool,
+        lazyLoad: PropTypes.bool,
+        slidesToShow: PropTypes.number,
+        slidesToScroll: PropTypes.number,
+        variableWidth: PropTypes.bool,
+        responsive: PropTypes.array
+    }),
+    showLoves: PropTypes.bool,
+    showRemixes: PropTypes.bool,
+    type: PropTypes.string
+};
+
+Carousel.defaultProps = {
+    items: require('./carousel.json'),
+    settings: {},
+    showRemixes: false,
+    showLoves: false,
+    type: 'project'
+};
 
 module.exports = Carousel;

src/components/carousel/legacy-carousel.jsx

@@ -1,37 +1,22 @@
 // This component handles json returned via proxy from a django server,
 // or directly from a django server, and the model structure that system
 // has.
-var classNames = require('classnames');
-var defaults = require('lodash.defaults');
-var React = require('react');
-var Slider = require('react-slick');
+const classNames = require('classnames');
+const defaults = require('lodash.defaults');
+const PropTypes = require('prop-types');
+const React = require('react');
+const Slider = require('react-slick');
 
-var Thumbnail = require('../thumbnail/thumbnail.jsx');
+const Thumbnail = require('../thumbnail/thumbnail.jsx');
 
-var frameless = require('../../lib/frameless.js');
+const frameless = require('../../lib/frameless.js');
 
 require('slick-carousel/slick/slick.scss');
 require('slick-carousel/slick/slick-theme.scss');
 require('./carousel.scss');
 
-/**
- * Displays content in horizontal scrolling box. Example usage: splash page rows.
- */
-var LegacyCarousel = React.createClass({
-    type: 'LegacyCarousel',
-    propTypes: {
-        items: React.PropTypes.array
-    },
-    getDefaultProps: function () {
-        return {
-            items: require('./carousel.json'),
-            showRemixes: false,
-            showLoves: false
-        };
-    },
-    render: function () {
-        var settings = this.props.settings || {};
-        defaults(settings, {
+const Carousel = props => {
+    defaults(props.settings, {
         centerMode: false,
         dots: false,
         infinite: false,
@@ -40,58 +25,94 @@ var LegacyCarousel = React.createClass({
         slidesToScroll: 5,
         variableWidth: true,
         responsive: [
-                {breakpoint: frameless.mobile, settings: {
+            {
+                breakpoint: frameless.mobile,
+                settings: {
                     arrows: true,
                     slidesToScroll: 1,
                     slidesToShow: 1,
                     centerMode: true
-                }},
-                {breakpoint: frameless.tablet, settings: {
+                }
+            },
+            {
+                breakpoint: frameless.tablet,
+                settings: {
                     slidesToScroll: 2,
                     slidesToShow: 2
-                }},
-                {breakpoint: frameless.desktop, settings: {
+                }
+            },
+            {
+                breakpoint: frameless.desktop,
+                settings: {
                     slidesToScroll: 4,
                     slidesToShow: 4
-                }}
+                }
+            }
         ]
     });
-        var arrows = this.props.items.length > settings.slidesToShow;
-        var classes = classNames(
-            'carousel',
-            this.props.className
-        );
+    const arrows = props.items.length > props.settings.slidesToShow;
     return (
-            <Slider className={classes} arrows={arrows} {... settings}>
-                {this.props.items.map(function (item) {
-                    var href = '';
+        <Slider
+            arrows={arrows}
+            className={classNames('carousel', props.className)}
+            {... props.settings}
+        >
+            {props.items.map(item => {
+                let href = '';
                 switch (item.type) {
                 case 'gallery':
-                        href = '/studios/' + item.id + '/';
+                    href = `/studios/${item.id}/`;
                     break;
                 case 'project':
-                        href = '/projects/' + item.id + '/';
+                    href = `/projects/${item.id}/`;
                     break;
                 default:
-                        href = '/' + item.type + '/' + item.id + '/';
+                    href = `/${item.type}/${item.id}/`;
                 }
 
                 return (
-                        <Thumbnail key={[this.key, item.id].join('.')}
-                                   showLoves={this.props.showLoves}
-                                   showRemixes={this.props.showRemixes}
-                                   type={item.type}
-                                   href={href}
-                                   title={item.title}
-                                   src={item.thumbnail_url}
+                    <Thumbnail
                         creator={item.creator}
+                        href={href}
+                        key={[props.type, item.id].join('.')}
+                        loves={item.love_count}
                         remixes={item.remixers_count}
-                                   loves={item.love_count} />
+                        showLoves={props.showLoves}
+                        showRemixes={props.showRemixes}
+                        src={item.thumbnail_url}
+                        title={item.title}
+                        type={item.type}
+                    />
                 );
-                }.bind(this))}
+            })}
         </Slider>
     );
-    }
-});
+};
 
-module.exports = LegacyCarousel;
+Carousel.propTypes = {
+    className: PropTypes.string,
+    items: PropTypes.arrayOf(PropTypes.any),
+    settings: PropTypes.shape({
+        centerMode: PropTypes.bool,
+        dots: PropTypes.bool,
+        infinite: PropTypes.bool,
+        lazyLoad: PropTypes.bool,
+        slidesToShow: PropTypes.number,
+        slidesToScroll: PropTypes.number,
+        variableWidth: PropTypes.bool,
+        responsive: PropTypes.array
+    }),
+    showLoves: PropTypes.bool,
+    showRemixes: PropTypes.bool,
+    type: PropTypes.string
+};
+
+Carousel.defaultProps = {
+    items: require('./carousel.json'),
+    settings: {},
+    showRemixes: false,
+    showLoves: false,
+    type: 'project'
+};
+
+module.exports = Carousel;

src/components/comment/comment.jsx

@@ -1,34 +1,33 @@
-var classNames = require('classnames');
-var FormattedRelative = require('react-intl').FormattedRelative;
-var React = require('react');
+const classNames = require('classnames');
+const FormattedRelative = require('react-intl').FormattedRelative;
+const PropTypes = require('prop-types');
+const React = require('react');
 
-var EmojiText = require('../emoji-text/emoji-text.jsx');
+const EmojiText = require('../emoji-text/emoji-text.jsx');
 
 require('./comment.scss');
 
-var CommentText = React.createClass({
-    type: 'CommentText',
-    propTypes: {
-        comment: React.PropTypes.string.isRequired,
-        datetimeCreated: React.PropTypes.string,
-        className: React.PropTypes.string
-    },
-    render: function () {
-        var classes = classNames(
-            'comment-text',
-            this.props.class
-        );
-        return (
-            <div className={classes}>
-                <EmojiText className="mod-comment" text={this.props.comment} />
-                {typeof this.props.datetimeCreated !== 'undefined' ? [
-                    <p className="comment-text-timestamp">
-                        <FormattedRelative value={new Date(this.props.datetimeCreated)} />
+const CommentText = props => (
+    <div className={classNames('comment-text', props.className)}>
+        <EmojiText
+            className="mod-comment"
+            text={props.comment}
+        />
+        {typeof props.datetimeCreated === 'undefined' ? [] : [
+            <p
+                className="comment-text-timestamp"
+                key="comment-text-timestamp"
+            >
+                <FormattedRelative value={new Date(props.datetimeCreated)} />
             </p>
-                ] : []}
+        ]}
     </div>
-        );
-    }
-});
+);
+
+CommentText.propTypes = {
+    className: PropTypes.string,
+    comment: PropTypes.string.isRequired,
+    datetimeCreated: PropTypes.string
+};
 
 module.exports = CommentText;

src/components/deck/deck.jsx

@@ -1,22 +1,29 @@
-var classNames = require('classnames');
-var React = require('react');
+const classNames = require('classnames');
+const PropTypes = require('prop-types');
+const React = require('react');
 
 require('./deck.scss');
 
-var Deck = React.createClass({
-    displayName: 'Deck',
-    render: function () {
-        return (
-            <div className={classNames(['deck', this.props.className])}>
+const Deck = props => (
+    <div className={classNames(['deck', props.className])}>
         <div className="inner">
-                    <a href="/" aria-label="Scratch">
-                        <img className="logo" src="/images/logo_sm.png" />
+            <a
+                aria-label="Scratch"
+                href="/"
+            >
+                <img
+                    className="logo"
+                    src="/images/logo_sm.png"
+                />
             </a>
-                    {this.props.children}
+            {props.children}
         </div>
     </div>
-        );
-    }
-});
+);
+
+Deck.propTypes = {
+    children: PropTypes.node,
+    className: PropTypes.string
+};
 
 module.exports = Deck;

src/components/dropdown-banner/banner.jsx

@@ -1,33 +1,29 @@
-var classNames = require('classnames');
-var React = require('react');
+const classNames = require('classnames');
+const PropTypes = require('prop-types');
+const React = require('react');
 
 require('./banner.scss');
 
-/**
- * Container for messages displayed below the nav bar that can be dismissed
- * (See: email not confirmed banner)
- */
-var Banner = React.createClass({
-    type: 'Banner',
-    propTypes: {
-        onRequestDismiss: React.PropTypes.func
-    },
-    render: function () {
-        var classes = classNames(
-            'banner',
-            this.props.className
-        );
-        return (
-            <div className={classes}>
+const Banner = props => (
+    <div className={classNames('banner', props.className)}>
         <div className="inner">
-                    {this.props.children}
-                    {this.props.onRequestDismiss ? [
-                        <a className="close" key="close" href="#" onClick={this.props.onRequestDismiss}>x</a>
+            {props.children}
+            {props.onRequestDismiss ? [
+                <a
+                    className="close"
+                    href="#"
+                    key="close"
+                    onClick={props.onRequestDismiss}
+                >x</a>
             ] : []}
         </div>
     </div>
-        );
-    }
-});
+);
+
+Banner.propTypes = {
+    children: PropTypes.node,
+    className: PropTypes.string,
+    onRequestDismiss: PropTypes.func
+};
 
 module.exports = Banner;

src/components/dropdown/dropdown.jsx

@@ -1,40 +1,46 @@
-var React = require('react');
-var classNames = require('classnames');
+const bindAll = require('lodash.bindall');
+const classNames = require('classnames');
+const onClickOutside = require('react-onclickoutside').default;
+const PropTypes = require('prop-types');
+const React = require('react');
 
 require('./dropdown.scss');
 
-var Dropdown = React.createClass({
-    type: 'Dropdown',
-    mixins: [
-        require('react-onclickoutside')
-    ],
-    propTypes: {
-        onRequestClose: React.PropTypes.func,
-        isOpen: React.PropTypes.bool
-    },
-    getDefaultProps: function () {
-        return {
-            as: 'div',
-            isOpen: false
-        };
-    },
-    handleClickOutside: function () {
+class Dropdown extends React.Component {
+    constructor (props) {
+        super(props);
+        bindAll(this, [
+            'handleClickOutside'
+        ]);
+    }
+    handleClickOutside () {
         if (this.props.isOpen) {
             this.props.onRequestClose();
         }
-    },
-    render: function () {
-        var classes = classNames(
-            'dropdown',
-            this.props.className,
-            {open: this.props.isOpen}
-        );
+    }
+    render () {
         return (
-            <this.props.as className={classes}>
+            <this.props.as
+                className={classNames('dropdown', this.props.className, {
+                    open: this.props.isOpen
+                })}
+            >
                 {this.props.children}
             </this.props.as>
         );
     }
-});
+}
 
-module.exports = Dropdown;
+Dropdown.propTypes = {
+    children: PropTypes.node,
+    className: PropTypes.string,
+    isOpen: PropTypes.bool,
+    onRequestClose: PropTypes.func.isRequired
+};
+
+Dropdown.defaultProps = {
+    as: 'div',
+    isOpen: false
+};
+
+module.exports = onClickOutside(Dropdown);

src/components/dropdown/dropdown.scss

@@ -24,9 +24,13 @@
     }
 
     a {
+        &:link,
+        &:visited,
+        &:active {
             background-color: transparent;
             color: $type-white;
         }
+    }
 
     input {
         // 100% minus border and padding

src/components/emoji-text/emoji-text.jsx

@@ -1,33 +1,25 @@
-var classNames = require('classnames');
-var React = require('react');
+const classNames = require('classnames');
+const PropTypes = require('prop-types');
+const React = require('react');
 
 require('./emoji-text.scss');
 
-var EmojiText = React.createClass({
-    type: 'EmojiText',
-    propTyes: {
-        text: React.PropTypes.string.isRequired,
-        className: React.PropTypes.string
-    },
-    getDefaultProps: function () {
-        return {
-            as: 'p'
-        };
-    },
-    render: function () {
-        var classes = classNames(
-            'emoji-text',
-            this.props.className
-        );
-        return (
-            <this.props.as
-                className={classes}
-                dangerouslySetInnerHTML={{
-                    __html: this.props.text
+const EmojiText = props => (
+    <props.as
+        className={classNames('emoji-text', props.className)}
+        dangerouslySetInnerHTML={{ // eslint-disable-line react/no-danger
+            __html: props.text
         }}
     />
-        );
-    }
-});
+);
+
+EmojiText.propTypes = {
+    className: PropTypes.string,
+    text: PropTypes.string.isRequired
+};
+
+EmojiText.defaultProps = {
+    as: 'p'
+};
 
 module.exports = EmojiText;

src/components/flex-row/flex-row.jsx

@@ -1,26 +1,22 @@
-var classNames = require('classnames');
-var React = require('react');
+const classNames = require('classnames');
+const PropTypes = require('prop-types');
+const React = require('react');
 
 require('./flex-row.scss');
 
-var FlexRow = React.createClass({
-    type: 'FlexRow',
-    getDefaultProps: function () {
-        return {
+const FlexRow = props => (
+    <props.as className={classNames('flex-row', props.className)}>
+        {props.children}
+    </props.as>
+);
+
+FlexRow.propTypes = {
+    children: PropTypes.node,
+    className: PropTypes.string
+};
+
+FlexRow.defaultProps = {
     as: 'div'
-        };
-    },
-    render: function () {
-        var classes = classNames(
-            'flex-row',
-            this.props.className
-        );
-        return (
-            <this.props.as className={classes}>
-                {this.props.children}
-            </this.props.as>
-        );
-    }
-});
+};
 
 module.exports = FlexRow;

src/components/footer/conference/2016/footer.jsx

@@ -1,58 +1,69 @@
-var React = require('react');
+const React = require('react');
 
-var FlexRow = require('../../../flex-row/flex-row.jsx');
-var FooterBox = require('../../container/footer.jsx');
+const FlexRow = require('../../../flex-row/flex-row.jsx');
+const FooterBox = require('../../container/footer.jsx');
 
 require('../footer.scss');
 
-var ConferenceFooter = React.createClass({
-    type: 'ConferenceFooter',
-    render: function () {
-        return (
+const ConferenceFooter = () => (
     <FooterBox>
         <div className="collaborators">
             <h4>Sponsors</h4>
             <FlexRow as="ul">
                 <li className="odl">
                     <a href="https://odl.mit.edu/">
-                                <img src="/images/conference/footer/mit-odl.png"
-                                     alt="MIT Office of Digital Learning" />
+                        <img
+                            alt="MIT Office of Digital Learning"
+                            src="/images/conference/footer/mit-odl.png"
+                        />
                     </a>
                 </li>
                 <li className="intel">
                     <a href="http://www.intel.com/content/www/us/en/homepage.html">
-                                <img src="/images/conference/footer/intel.png"
-                                     alt="Intel" />
+                        <img
+                            alt="Intel"
+                            src="/images/conference/footer/intel.png"
+                        />
                     </a>
                 </li>
                 <li className="lego">
                     <a href="http://www.legofoundation.com/">
-                                <img src="/images/conference/footer/lego-foundation.png"
-                                     alt="LEGO Foundation" />
+                        <img
+                            alt="LEGO Foundation"
+                            src="/images/conference/footer/lego-foundation.png"
+                        />
                     </a>
                 </li>
                 <li className="google">
                     <a href="http://www.google.com/">
-                                <img src="/images/conference/footer/google.png"
-                                     alt="Google" />
+                        <img
+                            alt="Google"
+                            src="/images/conference/footer/google.png"
+                        />
                     </a>
                 </li>
                 <li className="siegel">
                     <a href="http://www.siegelendowment.org/">
-                                <img src="/images/conference/footer/siegel-endowment.png"
-                                     alt="Siegel Family Endowment" />
+                        <img
+                            alt="Siegel Family Endowment"
+                            src="/images/conference/footer/siegel-endowment.png"
+                        />
                     </a>
                 </li>
                 <li className="nostarch">
                     <a href="https://www.nostarch.com/">
-                                <img src="/images/conference/footer/no-starch.png"
-                                     alt="No Starch Press" />
+                        <img
+                            alt="No Starch Press"
+                            src="/images/conference/footer/no-starch.png"
+                        />
                     </a>
                 </li>
                 <li className="scratchfoundation">
                     <a href="http://www.scratchfoundation.org/">
-                                <img src="/images/conference/footer/scratch-foundation.png"
-                                     alt="Scratch Foundation" />
+                        <img
+                            alt="Scratch Foundation"
+                            src="/images/conference/footer/scratch-foundation.png"
+                        />
                     </a>
                 </li>
             </FlexRow>
@@ -61,25 +72,34 @@ var ConferenceFooter = React.createClass({
             <div className="family">
                 <h4>Scratch Family</h4>
                 <FlexRow>
-                            <FlexRow as="ul" className="column">
+                    <FlexRow
+                        as="ul"
+                        className="column"
+                    >
                         <li>
-                                    <a href="https://scratch.mit.edu" target="_blank">Scratch</a>
+                            <a href="https://scratch.mit.edu">Scratch</a>
                         </li>
                         <li>
-                                    <a href="http://www.scratchjr.org/" target="_blank">ScratchJr</a>
+                            <a href="http://www.scratchjr.org/">ScratchJr</a>
                         </li>
                     </FlexRow>
-                            <FlexRow as="ul" className="column">
+                    <FlexRow
+                        as="ul"
+                        className="column"
+                    >
                         <li>
-                                    <a href="http://www.scratchfoundation.org/" target="_blank">Scratch Foundation</a>
+                            <a href="http://www.scratchfoundation.org/">Scratch Foundation</a>
                         </li>
                         <li>
-                                    <a href="http://scratched.gse.harvard.edu/" target="_blank">ScratchEd</a>
+                            <a href="http://scratched.gse.harvard.edu/">ScratchEd</a>
                         </li>
                     </FlexRow>
-                            <FlexRow as="ul" className="column">
+                    <FlexRow
+                        as="ul"
+                        className="column"
+                    >
                         <li>
-                                    <a href="http://day.scratch.mit.edu" target="_blank">Scratch Day</a>
+                            <a href="http://day.scratch.mit.edu">Scratch Day</a>
                         </li>
                     </FlexRow>
                 </FlexRow>
@@ -91,7 +111,7 @@ var ConferenceFooter = React.createClass({
                 <div className="contact-us">
                     <h4>Contact</h4>
                     <p>
-                                <a href="mailto:help@scratch.mit.edu" target="_blank">
+                        <a href="mailto:help@scratch.mit.edu">
                             Email Us
                         </a>
                     </p>
@@ -99,18 +119,27 @@ var ConferenceFooter = React.createClass({
                 <div className="social">
                     <FlexRow as="ul">
                         <li>
-                                    <a href="//www.twitter.com/scratch" target="_blank">
-                                        <img src="/images/conference/footer/twitter.png" alt="scratch twitter" />
+                            <a href="//www.twitter.com/scratch">
+                                <img
+                                    alt="scratch twitter"
+                                    src="/images/conference/footer/twitter.png"
+                                />
                             </a>
                         </li>
                         <li>
-                                    <a href="//www.facebook.com/scratchteam" target="_blank">
-                                        <img src="/images/conference/footer/facebook.png" alt="scratch facebook" />
+                            <a href="//www.facebook.com/scratchteam">
+                                <img
+                                    alt="scratch facebook"
+                                    src="/images/conference/footer/facebook.png"
+                                />
                             </a>
                         </li>
                         <li>
-                                    <a href="http://medium.com/scratchfoundation-blog" target="_blank">
-                                        <img src="/images/conference/footer/medium.png" alt="scratch foundation blog" />
+                            <a href="http://medium.com/scratchfoundation-blog">
+                                <img
+                                    alt="scratch foundation blog"
+                                    src="/images/conference/footer/medium.png"
+                                />
                             </a>
                         </li>
                     </FlexRow>
@@ -118,8 +147,6 @@ var ConferenceFooter = React.createClass({
             </div>
         </FlexRow>
     </FooterBox>
-        );
-    }
-});
+);
 
 module.exports = ConferenceFooter;

src/components/footer/conference/2017/footer.jsx

@@ -1,55 +1,60 @@
-var React = require('react');
-var ReactIntl = require('react-intl');
+const injectIntl = require('react-intl').injectIntl;
+const intlShape = require('react-intl').intlShape;
+const FormattedMessage = require('react-intl').FormattedMessage;
+const React = require('react');
 
-var injectIntl = ReactIntl.injectIntl;
-var FormattedMessage = ReactIntl.FormattedMessage;
-
-var FlexRow = require('../../../flex-row/flex-row.jsx');
-var FooterBox = require('../../container/footer.jsx');
-var LanguageChooser = require('../../../languagechooser/languagechooser.jsx');
+const FlexRow = require('../../../flex-row/flex-row.jsx');
+const FooterBox = require('../../container/footer.jsx');
+const LanguageChooser = require('../../../languagechooser/languagechooser.jsx');
 
 require('../footer.scss');
 
-var ConferenceFooter = React.createClass({
-    type: 'ConferenceFooter',
-    render: function () {
-        return (
+const ConferenceFooter = props => (
     <FooterBox>
         <FlexRow className="scratch-links">
             <div className="family">
-                        <h4><FormattedMessage id='footer.scratchFamily' /></h4>
+                <h4><FormattedMessage id="footer.scratchFamily" /></h4>
                 <FlexRow>
-                            <FlexRow as="ul" className="column">
+                    <FlexRow
+                        as="ul"
+                        className="column"
+                    >
                         <li>
-                                    <a href="https://scratch.mit.edu" target="_blank">Scratch</a>
+                            <a href="https://scratch.mit.edu">Scratch</a>
                         </li>
                         <li>
-                                    <a href="http://www.scratchjr.org/" target="_blank">ScratchJr</a>
+                            <a href="http://www.scratchjr.org/">ScratchJr</a>
                         </li>
                     </FlexRow>
-                            <FlexRow as="ul" className="column">
+                    <FlexRow
+                        as="ul"
+                        className="column"
+                    >
                         <li>
-                                    <a href="http://www.scratchfoundation.org/" target="_blank">Scratch Foundation</a>
+                            <a href="http://www.scratchfoundation.org/">Scratch Foundation</a>
                         </li>
                         <li>
-                                    <a href="http://scratched.gse.harvard.edu/" target="_blank">ScratchEd</a>
+                            <a href="http://scratched.gse.harvard.edu/">ScratchEd</a>
                         </li>
                     </FlexRow>
-                            <FlexRow as="ul" className="column">
+                    <FlexRow
+                        as="ul"
+                        className="column"
+                    >
                         <li>
-                                    <a href="http://day.scratch.mit.edu" target="_blank">Scratch Day</a>
+                            <a href="http://day.scratch.mit.edu">Scratch Day</a>
                         </li>
                     </FlexRow>
                 </FlexRow>
                 <p className="legal">
-                            <FormattedMessage id='general.copyright' />
+                    <FormattedMessage id="general.copyright" />
                 </p>
             </div>
             <div className="media">
                 <div className="contact-us">
                     <h4>Contact</h4>
                     <p>
-                                <a href="mailto:help@scratch.mit.edu" target="_blank">
+                        <a href="mailto:help@scratch.mit.edu">
                             Email Us
                         </a>
                     </p>
@@ -57,28 +62,39 @@ var ConferenceFooter = React.createClass({
                 <div className="social">
                     <FlexRow as="ul">
                         <li>
-                                    <a href="//www.twitter.com/scratch" target="_blank">
-                                        <img src="/images/conference/footer/twitter.png" alt="scratch twitter" />
+                            <a href="//www.twitter.com/scratch">
+                                <img
+                                    alt="scratch twitter"
+                                    src="/images/conference/footer/twitter.png"
+                                />
                             </a>
                         </li>
                         <li>
-                                    <a href="//www.facebook.com/scratchteam" target="_blank">
-                                        <img src="/images/conference/footer/facebook.png" alt="scratch facebook" />
+                            <a href="//www.facebook.com/scratchteam">
+                                <img
+                                    alt="scratch facebook"
+                                    src="/images/conference/footer/facebook.png"
+                                />
                             </a>
                         </li>
                         <li>
-                                    <a href="http://medium.com/scratchfoundation-blog" target="_blank">
-                                        <img src="/images/conference/footer/medium.png" alt="scratch foundation blog" />
+                            <a href="http://medium.com/scratchfoundation-blog">
+                                <img
+                                    alt="scratch foundation blog"
+                                    src="/images/conference/footer/medium.png"
+                                />
                             </a>
                         </li>
                     </FlexRow>
                 </div>
             </div>
         </FlexRow>
-                <LanguageChooser locale={this.props.intl.locale} />
+        <LanguageChooser locale={props.intl.locale} />
     </FooterBox>
-        );
-    }
-});
+);
+
+ConferenceFooter.propTypes = {
+    intl: intlShape
+};
 
 module.exports = injectIntl(ConferenceFooter);

src/components/footer/conference/2018/footer.jsx

@@ -1,55 +1,94 @@
-var React = require('react');
-var ReactIntl = require('react-intl');
+const FormattedMessage = require('react-intl').FormattedMessage;
+const injectIntl = require('react-intl').injectIntl;
+const intlShape = require('react-intl').intlShape;
+const React = require('react');
 
-var injectIntl = ReactIntl.injectIntl;
-var FormattedMessage = ReactIntl.FormattedMessage;
-
-var FlexRow = require('../../../flex-row/flex-row.jsx');
-var FooterBox = require('../../container/footer.jsx');
-var LanguageChooser = require('../../../languagechooser/languagechooser.jsx');
+const FlexRow = require('../../../flex-row/flex-row.jsx');
+const FooterBox = require('../../container/footer.jsx');
+const LanguageChooser = require('../../../languagechooser/languagechooser.jsx');
 
 require('../footer.scss');
 
-var ConferenceFooter = React.createClass({
-    type: 'ConferenceFooter',
-    render: function () {
-        return (
+const ConferenceFooter = props => (
     <FooterBox>
         <FlexRow className="scratch-links">
             <div className="family">
-                        <h4><FormattedMessage id='footer.scratchFamily' /></h4>
+                <h4><FormattedMessage id="footer.scratchFamily" /></h4>
                 <FlexRow>
-                            <FlexRow as="ul" className="column">
+                    <FlexRow
+                        as="ul"
+                        className="column"
+                    >
                         <li>
-                                    <a href="https://scratch.mit.edu" target="_blank">Scratch</a>
+                            <a
+                                href="https://scratch.mit.edu"
+                                rel="noopener noreferrer"
+                                target="_blank"
+                            >
+                                Scratch
+                            </a>
                         </li>
                         <li>
-                                    <a href="http://www.scratchjr.org/" target="_blank">ScratchJr</a>
+                            <a
+                                href="http://www.scratchjr.org/"
+                                rel="noopener noreferrer"
+                                target="_blank"
+                            >
+                                ScratchJr
+                            </a>
                         </li>
                     </FlexRow>
-                            <FlexRow as="ul" className="column">
+                    <FlexRow
+                        as="ul"
+                        className="column"
+                    >
                         <li>
-                                    <a href="http://www.scratchfoundation.org/" target="_blank">Scratch Foundation</a>
+                            <a
+                                href="http://www.scratchfoundation.org/"
+                                rel="noopener noreferrer"
+                                target="_blank"
+                            >
+                                Scratch Foundation
+                            </a>
                         </li>
                         <li>
-                                    <a href="http://scratched.gse.harvard.edu/" target="_blank">ScratchEd</a>
+                            <a
+                                href="http://scratched.gse.harvard.edu/"
+                                rel="noopener noreferrer"
+                                target="_blank"
+                            >
+                                ScratchEd
+                            </a>
                         </li>
                     </FlexRow>
-                            <FlexRow as="ul" className="column">
+                    <FlexRow
+                        as="ul"
+                        className="column"
+                    >
                         <li>
-                                    <a href="http://day.scratch.mit.edu" target="_blank">Scratch Day</a>
+                            <a
+                                href="http://day.scratch.mit.edu"
+                                rel="noopener noreferrer"
+                                target="_blank"
+                            >
+                                Scratch Day
+                            </a>
                         </li>
                     </FlexRow>
                 </FlexRow>
                 <p className="legal">
-                            <FormattedMessage id='general.copyright' />
+                    <FormattedMessage id="general.copyright" />
                 </p>
             </div>
             <div className="media">
                 <div className="contact-us">
                     <h4>Contact</h4>
                     <p>
-                                <a href="mailto:conference@scratch.mit.edu" target="_blank">
+                        <a
+                            href="mailto:conference@scratch.mit.edu"
+                            rel="noopener noreferrer"
+                            target="_blank"
+                        >
                             Email Us
                         </a>
                     </p>
@@ -57,28 +96,51 @@ var ConferenceFooter = React.createClass({
                 <div className="social">
                     <FlexRow as="ul">
                         <li>
-                                    <a href="//www.twitter.com/scratch" target="_blank">
-                                        <img src="/images/conference/footer/twitter.png" alt="scratch twitter" />
+                            <a
+                                href="//www.twitter.com/scratch"
+                                rel="noopener noreferrer"
+                                target="_blank"
+                            >
+                                <img
+                                    alt="scratch twitter"
+                                    src="/images/conference/footer/twitter.png"
+                                />
                             </a>
                         </li>
                         <li>
-                                    <a href="//www.facebook.com/scratchteam" target="_blank">
-                                        <img src="/images/conference/footer/facebook.png" alt="scratch facebook" />
+                            <a
+                                href="//www.facebook.com/scratchteam"
+                                rel="noopener noreferrer"
+                                target="_blank"
+                            >
+                                <img
+                                    alt="scratch facebook"
+                                    src="/images/conference/footer/facebook.png"
+                                />
                             </a>
                         </li>
                         <li>
-                                    <a href="http://medium.com/scratchfoundation-blog" target="_blank">
-                                        <img src="/images/conference/footer/medium.png" alt="scratch foundation blog" />
+                            <a
+                                href="http://medium.com/scratchfoundation-blog"
+                                rel="noopener noreferrer"
+                                target="_blank"
+                            >
+                                <img
+                                    alt="scratch foundation blog"
+                                    src="/images/conference/footer/medium.png"
+                                />
                             </a>
                         </li>
                     </FlexRow>
                 </div>
             </div>
         </FlexRow>
-                <LanguageChooser locale={this.props.intl.locale} />
+        <LanguageChooser locale={props.intl.locale} />
     </FooterBox>
-        );
-    }
-});
+);
+
+ConferenceFooter.propTypes = {
+    intl: intlShape
+};
 
 module.exports = injectIntl(ConferenceFooter);

src/components/footer/container/footer.jsx

@@ -1,16 +1,16 @@
-var React = require('react');
+const PropTypes = require('prop-types');
+const React = require('react');
 
 require('./footer.scss');
 
-var FooterBox = React.createClass({
-    type: 'FooterBox',
-    render: function () {
-        return (
+const FooterBox = props => (
     <div className="inner">
-                {this.props.children}
+        {props.children}
     </div>
-        );
-    }
-});
+);
+
+FooterBox.propTypes = {
+    children: PropTypes.node
+};
 
 module.exports = FooterBox;

src/components/footer/www/footer.jsx

@@ -1,54 +1,51 @@
-var React = require('react');
-var ReactIntl = require('react-intl');
-var FormattedMessage = ReactIntl.FormattedMessage;
-var injectIntl = ReactIntl.injectIntl;
+const FormattedMessage = require('react-intl').FormattedMessage;
+const injectIntl = require('react-intl').injectIntl;
+const intlShape = require('react-intl').intlShape;
+const MediaQuery = require('react-responsive').default;
+const React = require('react');
 
-var FooterBox = require('../container/footer.jsx');
-var LanguageChooser = require('../../languagechooser/languagechooser.jsx');
+const FooterBox = require('../container/footer.jsx');
+const LanguageChooser = require('../../languagechooser/languagechooser.jsx');
 
-var MediaQuery = require('react-responsive');
-var frameless = require('../../../lib/frameless');
+const frameless = require('../../../lib/frameless');
 
 require('./footer.scss');
 
-var Footer = React.createClass({
-    type: 'Footer',
-    render: function () {
-        return (
+const Footer = props => (
     <FooterBox>
         <MediaQuery maxWidth={frameless.tablet - 1}>
             <div className="lists">
                 <dl>
                     <dd>
                         <a href="/about">
-                                    <FormattedMessage id='general.aboutScratch' />
+                            <FormattedMessage id="general.aboutScratch" />
                         </a>
                     </dd>
                     <dd>
                         <a href="/jobs">
-                                    <FormattedMessage id='general.jobs' />
+                            <FormattedMessage id="general.jobs" />
                         </a>
                     </dd>
                     <dd>
                         <a href="/contact-us/">
-                                    <FormattedMessage id='general.contactUs' />
+                            <FormattedMessage id="general.contactUs" />
                         </a>
                     </dd>
                 </dl>
                 <dl>
                     <dd>
                         <a href="/terms_of_use">
-                                    <FormattedMessage id='general.termsOfUse' />
+                            <FormattedMessage id="general.termsOfUse" />
                         </a>
                     </dd>
                     <dd>
                         <a href="/privacy_policy">
-                                    <FormattedMessage id='general.privacyPolicy' />
+                            <FormattedMessage id="general.privacyPolicy" />
                         </a>
                     </dd>
                     <dd>
                         <a href="/community_guidelines">
-                                    <FormattedMessage id='general.guidelines' />
+                            <FormattedMessage id="general.guidelines" />
                         </a>
                     </dd>
                 </dl>
@@ -58,139 +55,139 @@ var Footer = React.createClass({
             <div className="lists">
                 <dl>
                     <dt>
-                                <FormattedMessage id='general.about' />
+                        <FormattedMessage id="general.about" />
                     </dt>
                     <dd>
                         <a href="/about">
-                                    <FormattedMessage id='general.aboutScratch' />
+                            <FormattedMessage id="general.aboutScratch" />
                         </a>
                     </dd>
                     <dd>
                         <a href="/parents/">
-                                    <FormattedMessage id='general.forParents' />
+                            <FormattedMessage id="general.forParents" />
                         </a>
                     </dd>
                     <dd>
                         <a href="/educators">
-                                    <FormattedMessage id='general.forEducators' />
+                            <FormattedMessage id="general.forEducators" />
                         </a>
                     </dd>
                     <dd>
                         <a href="/developers">
-                                    <FormattedMessage id='general.forDevelopers' />
+                            <FormattedMessage id="general.forDevelopers" />
                         </a>
                     </dd>
                     <dd>
                         <a href="/info/credits">
-                                    <FormattedMessage id='general.credits' />
+                            <FormattedMessage id="general.credits" />
                         </a>
                     </dd>
                     <dd>
                         <a href="/jobs">
-                                    <FormattedMessage id='general.jobs' />
+                            <FormattedMessage id="general.jobs" />
                         </a>
                     </dd>
                     <dd>
                         <a href="http://wiki.scratch.mit.edu/wiki/Scratch_Press">
-                                    <FormattedMessage id='general.press' />
+                            <FormattedMessage id="general.press" />
                         </a>
                     </dd>
                 </dl>
                 <dl>
                     <dt>
-                                <FormattedMessage id='general.community' />
+                        <FormattedMessage id="general.community" />
                     </dt>
                     <dd>
                         <a href="/community_guidelines">
-                                    <FormattedMessage id='general.guidelines' />
+                            <FormattedMessage id="general.guidelines" />
                         </a>
                     </dd>
                     <dd>
                         <a href="/discuss/">
-                                    <FormattedMessage id='footer.discuss' />
+                            <FormattedMessage id="footer.discuss" />
                         </a>
                     </dd>
                     <dd>
                         <a href="https://wiki.scratch.mit.edu/">
-                                    <FormattedMessage id='general.wiki' />
+                            <FormattedMessage id="general.wiki" />
                         </a>
                     </dd>
                     <dd>
                         <a href="/statistics/">
-                                    <FormattedMessage id='general.statistics' />
+                            <FormattedMessage id="general.statistics" />
                         </a>
                     </dd>
                 </dl>
 
                 <dl>
                     <dt>
-                                <FormattedMessage id='general.support' />
+                        <FormattedMessage id="general.support" />
                     </dt>
                     <dd>
                         <a href="/tips">
-                                    <FormattedMessage id='general.tips' />
+                            <FormattedMessage id="general.tips" />
                         </a>
                     </dd>
                     <dd>
                         <a href="/info/faq">
-                                    <FormattedMessage id='general.faq' />
+                            <FormattedMessage id="general.faq" />
                         </a>
                     </dd>
                     <dd>
                         <a href="/download">
-                                    <FormattedMessage id='general.offlineEditor' />
+                            <FormattedMessage id="general.offlineEditor" />
                         </a>
                     </dd>
                     <dd>
                         <a href="/contact-us/">
-                                    <FormattedMessage id='general.contactUs' />
+                            <FormattedMessage id="general.contactUs" />
                         </a>
                     </dd>
                     <dd>
                         <a href="/store">
-                                    <FormattedMessage id='general.scratchStore' />
+                            <FormattedMessage id="general.scratchStore" />
                         </a>
                     </dd>
                     <dd>
                         <a href="https://secure.donationpay.org/scratchfoundation/">
-                                    <FormattedMessage id='general.donate'/>
+                            <FormattedMessage id="general.donate" />
                         </a>
                     </dd>
                 </dl>
 
                 <dl>
                     <dt>
-                                <FormattedMessage id='general.legal'/>
+                        <FormattedMessage id="general.legal" />
                     </dt>
                     <dd>
                         <a href="/terms_of_use">
-                                    <FormattedMessage id='general.termsOfUse' />
+                            <FormattedMessage id="general.termsOfUse" />
                         </a>
                     </dd>
                     <dd>
                         <a href="/privacy_policy">
-                                    <FormattedMessage id='general.privacyPolicy' />
+                            <FormattedMessage id="general.privacyPolicy" />
                         </a>
                     </dd>
                     <dd>
                         <a href="/DMCA">
-                                    <FormattedMessage id='general.dmca' />
+                            <FormattedMessage id="general.dmca" />
                         </a>
                     </dd>
                 </dl>
 
                 <dl>
                     <dt>
-                                <FormattedMessage id='footer.scratchFamily' />
+                        <FormattedMessage id="footer.scratchFamily" />
                     </dt>
                     <dd>
                         <a href="http://scratched.gse.harvard.edu/">
-                                    <FormattedMessage id='general.scratchEd' />
+                            <FormattedMessage id="general.scratchEd" />
                         </a>
                     </dd>
                     <dd>
                         <a href="http://www.scratchjr.org/">
-                                    <FormattedMessage id='general.scratchJr' />
+                            <FormattedMessage id="general.scratchJr" />
                         </a>
                     </dd>
                     <dd>
@@ -200,27 +197,29 @@ var Footer = React.createClass({
                     </dd>
                     <dd>
                         <a href="/conference">
-                                    <FormattedMessage id='general.scratchConference' />
+                            <FormattedMessage id="general.scratchConference" />
                         </a>
                     </dd>
                     <dd>
                         <a href="http://www.scratchfoundation.org/">
-                                    <FormattedMessage id='general.scratchFoundation' />
+                            <FormattedMessage id="general.scratchFoundation" />
                         </a>
                     </dd>
                 </dl>
             </div>
         </MediaQuery>
-                <LanguageChooser locale={this.props.intl.locale} />
+        <LanguageChooser locale={props.intl.locale} />
 
         <div className="copyright">
             <p>
-                        <FormattedMessage id='general.copyright' />
+                <FormattedMessage id="general.copyright" />
             </p>
         </div>
     </FooterBox>
-        );
-    }
-});
+);
+
+Footer.propTypes = {
+    intl: intlShape.isRequired
+};
 
 module.exports = injectIntl(Footer);

src/components/forms/button.jsx

@@ -1,22 +1,26 @@
-var React = require('react');
-var classNames = require('classnames');
+const classNames = require('classnames');
+const omit = require('lodash.omit');
+const PropTypes = require('prop-types');
+const React = require('react');
 
 require('./button.scss');
 
-var Button = React.createClass({
-    type: 'Button',
-    propTypes: {
+const Button = props => {
+    const classes = classNames('button', props.className);
 
-    },
-    render: function () {
-        var classes = classNames(
-            'button',
-            this.props.className
-        );
     return (
-            <button {... this.props} className={classes} >{this.props.children}</button>
+        <button
+            className={classes}
+            {...omit(props, ['className', 'children'])}
+        >
+            {props.children}
+        </button>
     );
-    }
-});
+};
+
+Button.propTypes = {
+    children: PropTypes.node,
+    className: PropTypes.string
+};
 
 module.exports = Button;

src/components/forms/charcount.jsx

@@ -1,28 +1,28 @@
-var classNames = require('classnames');
-var React = require('react');
+const classNames = require('classnames');
+const PropTypes = require('prop-types');
+const React = require('react');
 
 require('./charcount.scss');
 
-var CharCount = React.createClass({
-    type: 'CharCount',
-    getDefaultProps: function () {
-        return {
-            maxCharacters: 0,
-            currentCharacters: 0
-        };
-    },
-    render: function () {
-        var classes = classNames(
-            'char-count',
-            this.props.className,
-            {overmax: (this.props.currentCharacters > this.props.maxCharacters)}
-        );
-        return (
-            <p className={classes}>
-                {this.props.currentCharacters}/{this.props.maxCharacters}
+const CharCount = props => (
+    <p
+        className={classNames('char-count', props.className, {
+            overmax: (props.currentCharacters > props.maxCharacters)
+        })}
+    >
+        {props.currentCharacters}/{props.maxCharacters}
     </p>
-        );
-    }
-});
+);
+
+CharCount.propTypes = {
+    className: PropTypes.string,
+    currentCharacters: PropTypes.number,
+    maxCharacters: PropTypes.number
+};
+
+CharCount.defaultProps = {
+    currentCharacters: 0,
+    maxCharacters: 0
+};
 
 module.exports = CharCount;

src/components/forms/checkbox-group.jsx

@@ -1,25 +1,25 @@
-var classNames = require('classnames');
-var FRCCheckboxGroup = require('formsy-react-components').CheckboxGroup;
-var React = require('react');
-var defaultValidationHOC = require('./validations.jsx').defaultValidationHOC;
-var inputHOC = require('./input-hoc.jsx');
+const classNames = require('classnames');
+const FRCCheckboxGroup = require('formsy-react-components').CheckboxGroup;
+const PropTypes = require('prop-types');
+const React = require('react');
+
+const defaultValidationHOC = require('./validations.jsx').defaultValidationHOC;
+const inputHOC = require('./input-hoc.jsx');
 
 require('./row.scss');
 require('./checkbox-group.scss');
 
-var CheckboxGroup = React.createClass({
-    type: 'CheckboxGroup',
-    render: function () {
-        var classes = classNames(
-            'checkbox-group',
-            this.props.className
-        );
-        return (
-            <div className={classes}>
-                <FRCCheckboxGroup {... this.props} className={classes} />
+const CheckboxGroup = props => (
+    <div className={classNames('checkbox-group', props.className)}>
+        <FRCCheckboxGroup
+            className={classNames('checkbox-group', props.className)}
+            {... props}
+        />
     </div>
-        );
-    }
-});
+);
+
+CheckboxGroup.propTypes = {
+    className: PropTypes.string
+};
 
 module.exports = inputHOC(defaultValidationHOC(CheckboxGroup));

src/components/forms/checkbox.jsx

@@ -1,23 +1,23 @@
-var classNames = require('classnames');
-var FRCCheckbox = require('formsy-react-components').Checkbox;
-var React = require('react');
-var defaultValidationHOC = require('./validations.jsx').defaultValidationHOC;
-var inputHOC = require('./input-hoc.jsx');
+const classNames = require('classnames');
+const FRCCheckbox = require('formsy-react-components').Checkbox;
+const PropTypes = require('prop-types');
+const React = require('react');
+
+const defaultValidationHOC = require('./validations.jsx').defaultValidationHOC;
+const inputHOC = require('./input-hoc.jsx');
 
 require('./row.scss');
 require('./checkbox.scss');
 
-var Checkbox = React.createClass({
-    type: 'Checkbox',
-    render: function () {
-        var classes = classNames(
-            'checkbox-row',
-            this.props.className
-        );
-        return (
-            <FRCCheckbox rowClassName={classes} {... this.props} />
-        );
-    }
-});
+const Checkbox = props => (
+    <FRCCheckbox
+        rowClassName={classNames('checkbox-row', props.className)}
+        {...props}
+    />
+);
+
+Checkbox.propTypes = {
+    className: PropTypes.string
+};
 
 module.exports = inputHOC(defaultValidationHOC(Checkbox));

src/components/forms/form.jsx

@@ -1,47 +1,61 @@
-var classNames = require('classnames');
-var Formsy = require('formsy-react');
-var omit = require('lodash.omit');
-var React = require('react');
-var validations = require('./validations.jsx').validations;
+const bindAll = require('lodash.bindall');
+const classNames = require('classnames');
+const Formsy = require('formsy-react');
+const omit = require('lodash.omit');
+const PropTypes = require('prop-types');
+const React = require('react');
 
-for (var validation in validations) {
+const validations = require('./validations.jsx').validations;
+
+for (const validation in validations) {
     Formsy.addValidationRule(validation, validations[validation]);
 }
 
-var Form = React.createClass({
-    getDefaultProps: function () {
-        return {
-            noValidate: true,
-            onChange: function () {}
-        };
-    },
-    getInitialState: function () {
-        return {
+class Form extends React.Component {
+    constructor (props) {
+        super(props);
+        bindAll(this, [
+            'handleChange'
+        ]);
+        this.state = {
             allValues: {}
         };
-    },
-    onChange: function (currentValues, isChanged) {
+    }
+    handleChange (currentValues, isChanged) {
         this.setState({allValues: omit(currentValues, 'all')});
         this.props.onChange(currentValues, isChanged);
-    },
-    render: function () {
-        var classes = classNames(
-            'form',
-            this.props.className
-        );
+    }
+    render () {
         return (
-            <Formsy.Form {... this.props} className={classes} ref="formsy" onChange={this.onChange}>
-                {React.Children.map(this.props.children, function (child) {
+            <Formsy.Form
+                className={classNames('form', this.props.className)}
+                ref={form => {
+                    this.formsy = form;
+                }}
+                onChange={this.handleChange}
+                {...this.props}
+            >
+                {React.Children.map(this.props.children, child => {
                     if (!child) return child;
                     if (child.props.name === 'all') {
                         return React.cloneElement(child, {value: this.state.allValues});
-                    } else {
-                        return child;
                     }
-                }.bind(this))}
+                    return child;
+                })}
             </Formsy.Form>
         );
     }
-});
+}
+
+Form.propTypes = {
+    children: PropTypes.node,
+    className: PropTypes.string,
+    onChange: PropTypes.func
+};
+
+Form.defaultProps = {
+    noValidate: true,
+    onChange: function () {}
+};
 
 module.exports = Form;

src/components/forms/general-error.jsx

@@ -1,5 +1,6 @@
-var Formsy = require('formsy-react');
-var React = require('react');
+const Formsy = require('formsy-react');
+const PropTypes = require('prop-types');
+const React = require('react');
 
 require('./general-error.scss');
 
@@ -10,13 +11,18 @@ require('./general-error.scss');
  * give it a name, and apply your validation error to
  * the name of the GeneralError component.
  */
-module.exports = Formsy.HOC(React.createClass({
-    render: function () {
-        if (!this.props.showError()) return null;
+const GeneralError = props => {
+    if (!props.showError()) return null;
     return (
         <p className="general-error">
-                {this.props.getErrorMessage()}
+            {props.getErrorMessage()}
         </p>
     );
-    }
-}));
+};
+
+GeneralError.propTypes = {
+    getErrorMessage: PropTypes.func,
+    showError: PropTypes.func
+};
+
+module.exports = Formsy.HOC(GeneralError);

src/components/forms/input-hoc.jsx

@@ -1,20 +1,32 @@
-var React = require('react');
+const omit = require('lodash.omit');
+const PropTypes = require('prop-types');
+const React = require('react');
 
-module.exports = function InputComponentMixin (Component) {
-    var InputComponent = React.createClass({
-        getDefaultProps: function () {
-            return {
+/**
+ * Higher-order component for building an input field
+ * @param  {React.Component} Component an input component
+ * @return {React.Component}           a wrapped input component
+ */
+module.exports = Component => {
+    const InputComponent = props => (
+        <Component
+            help={props.required ? null : props.messages['general.notRequired']}
+            {...omit(props, ['messages'])}
+        />
+    );
+
+    InputComponent.propTypes = {
+        messages: PropTypes.shape({
+            'general.notRequired': PropTypes.string
+        }),
+        required: PropTypes.oneOfType([PropTypes.bool, PropTypes.string])
+    };
+
+    InputComponent.defaultProps = {
         messages: {
             'general.notRequired': 'Not Required'
         }
     };
-        },
-        render: function () {
-            return (
-                <Component help={this.props.required ? null : this.props.messages['general.notRequired']}
-                           {...this.props} />
-            );
-        }
-    });
+
     return InputComponent;
 };

src/components/forms/input.jsx

@@ -1,46 +1,57 @@
-var classNames = require('classnames');
-var FRCInput = require('formsy-react-components').Input;
-var React = require('react');
-var defaultValidationHOC = require('./validations.jsx').defaultValidationHOC;
-var inputHOC = require('./input-hoc.jsx');
+const bindAll = require('lodash.bindall');
+const classNames = require('classnames');
+const FRCInput = require('formsy-react-components').Input;
+const omit = require('lodash.omit');
+const PropTypes = require('prop-types');
+const React = require('react');
+
+const defaultValidationHOC = require('./validations.jsx').defaultValidationHOC;
+const inputHOC = require('./input-hoc.jsx');
 
 require('./input.scss');
 require('./row.scss');
 
-var Input = React.createClass({
-    type: 'Input',
-    getDefaultProps: function () {
-        return {};
-    },
-    getInitialState: function () {
-        return {
+class Input extends React.Component {
+    constructor (props) {
+        super(props);
+        bindAll(this, [
+            'handleInvalid',
+            'handleValid'
+        ]);
+        this.state = {
             status: ''
         };
-    },
-    onValid: function () {
+    }
+    handleValid () {
         this.setState({
             status: 'pass'
         });
-    },
-    onInvalid: function () {
+    }
+    handleInvalid () {
         this.setState({
             status: 'fail'
         });
-    },
-    render: function () {
-        var classes = classNames(
+    }
+    render () {
+        return (
+            <FRCInput
+                className="input"
+                rowClassName={classNames(
                     this.state.status,
                     this.props.className,
                     {'no-label': (typeof this.props.label === 'undefined')}
-        );
-        return (
-            <FRCInput {... this.props}
-                      className="input"
-                      rowClassName={classes}
-                      onValid={this.onValid}
-                      onInvalid={this.onInvalid} />
+                )}
+                onInvalid={this.handleInvalid}
+                onValid={this.handleValid}
+                {...omit(this.props, ['className'])}
+            />
         );
     }
-});
+}
+
+Input.propTypes = {
+    className: PropTypes.string,
+    label: PropTypes.string
+};
 
 module.exports = inputHOC(defaultValidationHOC(Input));

src/components/forms/phone-input.jsx

@@ -1,23 +1,33 @@
-var allCountries = require('react-telephone-input/lib/country_data').allCountries;
-var classNames = require('classnames');
-var ComponentMixin = require('formsy-react-components').ComponentMixin;
-var FormsyMixin = require('formsy-react').Mixin;
-var React = require('react');
-var ReactPhoneInput = require('react-telephone-input/lib/withStyles');
-var Row = require('formsy-react-components').Row;
+const allCountries = require('react-telephone-input/lib/country_data').allCountries;
+const classNames = require('classnames');
+const ComponentMixin = require('formsy-react-components').ComponentMixin;
+const createReactClass = require('create-react-class');
+const FormsyMixin = require('formsy-react').Mixin;
+const omit = require('lodash.omit');
+const PropTypes = require('prop-types');
+const React = require('react');
+const ReactPhoneInput = require('react-telephone-input/lib/withStyles').default;
+const Row = require('formsy-react-components').Row;
 
-var defaultValidationHOC = require('./validations.jsx').defaultValidationHOC;
-var inputHOC = require('./input-hoc.jsx');
-var intl = require('../../lib/intl.jsx');
-var validationHOCFactory = require('./validations.jsx').validationHOCFactory;
+const defaultValidationHOC = require('./validations.jsx').defaultValidationHOC;
+const inputHOC = require('./input-hoc.jsx');
+const intl = require('../../lib/intl.jsx');
+const validationHOCFactory = require('./validations.jsx').validationHOCFactory;
 
-var allIso2 = allCountries.map(function (country) {return country.iso2;});
+const allIso2 = allCountries.map(country => (country.iso2));
 
 require('./row.scss');
 require('./phone-input.scss');
 
-var PhoneInput = React.createClass({
+const PhoneInput = createReactClass({ // eslint-disable-line react/prefer-es6-class
     displayName: 'PhoneInput',
+    propTypes: {
+        className: PropTypes.string,
+        defaultCountry: PropTypes.string,
+        disabled: PropTypes.bool,
+        name: PropTypes.string,
+        onChange: PropTypes.func
+    },
     mixins: [
         FormsyMixin,
         ComponentMixin
@@ -31,29 +41,34 @@ var PhoneInput = React.createClass({
             defaultCountry: 'us'
         };
     },
-    onChangeInput: function (number, country) {
-        var value = {national_number: number, country_code: country};
+    handleChangeInput: function (number, country) {
+        const value = {
+            national_number: number,
+            country_code: country
+        };
         this.setValue(value);
         this.props.onChange(this.props.name, value);
     },
     render: function () {
-        var defaultCountry = PhoneInput.getDefaultProps().defaultCountry;
+        let defaultCountry = PhoneInput.getDefaultProps().defaultCountry;
         if (allIso2.indexOf(this.props.defaultCountry.toLowerCase()) !== -1) {
             defaultCountry = this.props.defaultCountry.toLowerCase();
         }
         return (
-            <Row {... this.getRowProperties()}
+            <Row
                 htmlFor={this.getId()}
                 rowClassName={classNames('phone-input', this.props.className)}
+                {...this.getRowProperties()}
             >
                 <div className="input-group">
-                    <ReactPhoneInput className="form-control"
-                                     {... this.props}
+                    <ReactPhoneInput
+                        className="form-control"
                         defaultCountry={defaultCountry}
-                                     onChange={this.onChangeInput}
+                        disabled={this.isFormDisabled() || this.props.disabled}
                         id={this.getId()}
                         label={null}
-                                     disabled={this.isFormDisabled() || this.props.disabled}
+                        onChange={this.handleChangeInput}
+                        {...omit(this.props, ['className', 'disabled', 'onChange'])}
                     />
                     {this.renderHelp()}
                     {this.renderErrorMessage()}
@@ -63,7 +78,7 @@ var PhoneInput = React.createClass({
     }
 });
 
-var phoneValidationHOC = validationHOCFactory({
+const phoneValidationHOC = validationHOCFactory({
     isPhone: <intl.FormattedMessage id="teacherRegistration.validationPhoneNumber" />
 });
 

src/components/forms/radio-group.jsx

@@ -1,23 +1,23 @@
-var classNames = require('classnames');
-var FRCRadioGroup = require('formsy-react-components').RadioGroup;
-var React = require('react');
-var defaultValidationHOC = require('./validations.jsx').defaultValidationHOC;
-var inputHOC = require('./input-hoc.jsx');
+const classNames = require('classnames');
+const FRCRadioGroup = require('formsy-react-components').RadioGroup;
+const PropTypes = require('prop-types');
+const React = require('react');
+
+const defaultValidationHOC = require('./validations.jsx').defaultValidationHOC;
+const inputHOC = require('./input-hoc.jsx');
 
 require('./row.scss');
 require('./radio-group.scss');
 
-var RadioGroup = React.createClass({
-    type: 'RadioGroup',
-    render: function () {
-        var classes = classNames(
-            'radio-group',
-            this.props.className
-        );
-        return (
-            <FRCRadioGroup {... this.props} className={classes} />
-        );
-    }
-});
+const RadioGroup = props => (
+    <FRCRadioGroup
+        className={classNames('radio-group', props.className)}
+        {... props}
+    />
+);
+
+RadioGroup.propTypes = {
+    className: PropTypes.string
+};
 
 module.exports = inputHOC(defaultValidationHOC(RadioGroup));

src/components/forms/select.jsx

@@ -1,33 +1,31 @@
-var classNames = require('classnames');
-var defaults = require('lodash.defaultsdeep');
-var FRCSelect = require('formsy-react-components').Select;
-var React = require('react');
-var defaultValidationHOC = require('./validations.jsx').defaultValidationHOC;
-var inputHOC = require('./input-hoc.jsx');
+const classNames = require('classnames');
+const defaults = require('lodash.defaultsdeep');
+const FRCSelect = require('formsy-react-components').Select;
+const PropTypes = require('prop-types');
+const React = require('react');
+
+const defaultValidationHOC = require('./validations.jsx').defaultValidationHOC;
+const inputHOC = require('./input-hoc.jsx');
 
 require('./row.scss');
 require('./select.scss');
 
-var Select = React.createClass({
-    type: 'Select',
-    propTypes: {
-        
-    },
-    render: function () {
-        var classes = classNames(
-            'select',
-            this.props.className
-        );
-        var props = this.props;
-        if (this.props.required && !this.props.value) {
-            props = defaults({}, this.props, {value: this.props.options[0].value});
+const Select = props => {
+    if (props.required && !props.value) {
+        props = defaults({}, props, {value: props.options[0].value});
     }
     return (
-            <div className={classes}>
-                <FRCSelect {... props} />
+        <div className={classNames('select', props.className)}>
+            <FRCSelect {...props} />
         </div>
     );
-    }
-});
+};
+
+Select.propTypes = {
+    className: PropTypes.string,
+    options: PropTypes.arrayOf(PropTypes.any),
+    required: PropTypes.bool,
+    value: PropTypes.oneOfType([PropTypes.number, PropTypes.string])
+};
 
 module.exports = inputHOC(defaultValidationHOC(Select));

src/components/forms/textarea.jsx

@@ -1,25 +1,25 @@
-var classNames = require('classnames');
-var FRCTextarea = require('formsy-react-components').Textarea;
-var React = require('react');
-var defaultValidationHOC = require('./validations.jsx').defaultValidationHOC;
-var inputHOC = require('./input-hoc.jsx');
+const classNames = require('classnames');
+const FRCTextarea = require('formsy-react-components').Textarea;
+const omit = require('lodash.omit');
+const PropTypes = require('prop-types');
+const React = require('react');
+
+const defaultValidationHOC = require('./validations.jsx').defaultValidationHOC;
+const inputHOC = require('./input-hoc.jsx');
 
 require('./row.scss');
 require('./textarea.scss');
 
-var TextArea = React.createClass({
-    type: 'TextArea',
-    render: function () {
-        var classes = classNames(
-            'textarea-row',
-            this.props.className
-        );
-        return (
-            <FRCTextarea {... this.props}
+const TextArea = props => (
+    <FRCTextarea
         className="textarea"
-                         rowClassName={classes} />
-        );
-    }
-});
+        rowClassName={classNames('textarea-row', props.className)}
+        {...omit(props, ['className'])}
+    />
+);
+
+TextArea.propTypes = {
+    className: PropTypes.string
+};
 
 module.exports = inputHOC(defaultValidationHOC(TextArea));

src/components/forms/validations.jsx

@@ -1,48 +1,46 @@
-var defaults = require('lodash.defaultsdeep');
-var intl = require('../../lib/intl.jsx');
-var libphonenumber = require('google-libphonenumber');
-var phoneNumberUtil = libphonenumber.PhoneNumberUtil.getInstance();
-var React = require('react');
-
-module.exports = {};
+const defaults = require('lodash.defaultsdeep');
+const intl = require('../../lib/intl.jsx');
+const libphonenumber = require('google-libphonenumber');
+const omit = require('lodash.omit');
+const phoneNumberUtil = libphonenumber.PhoneNumberUtil.getInstance();
+const PropTypes = require('prop-types');
+const React = require('react');
 
 module.exports.validations = {
-    notEquals: function (values, value, neq) {
-        return value !== neq;
-    },
-    notEqualsField: function (values, value, field) {
-        return value !== values[field];
-    },
-    isPhone: function (values, value) {
+    notEquals: (values, value, neq) => (value !== neq),
+    notEqualsField: (values, value, field) => (value !== values[field]),
+    isPhone: (values, value) => {
         if (typeof value === 'undefined') return true;
         if (value && value.national_number === '+') return true;
         try {
-            var parsed = phoneNumberUtil.parse(value.national_number, value.country_code.iso2);
+            const parsed = phoneNumberUtil.parse(value.national_number, value.country_code.iso2);
+            return phoneNumberUtil.isValidNumber(parsed);
         } catch (err) {
             return false;
         }
-        return phoneNumberUtil.isValidNumber(parsed);
     }
 };
+
 module.exports.validations.notEqualsUsername = module.exports.validations.notEquals;
 
-module.exports.validationHOCFactory = function (defaultValidationErrors) {
-    return function (Component) {
-        var ValidatedComponent = React.createClass({
-            render: function () {
-                var validationErrors = defaults(
+module.exports.validationHOCFactory = defaultValidationErrors => (Component => {
+    const ValidatedComponent = props => (
+        <Component
+            validationErrors={defaults(
                 {},
                 defaultValidationErrors,
-                    this.props.validationErrors
+                props.validationErrors
+            )}
+            {...omit(props, ['validationErrors'])}
+        />
     );
-                return (
-                    <Component {...this.props} validationErrors={validationErrors} />
-                );
-            }
-        });
-        return ValidatedComponent;
+
+    ValidatedComponent.propTypes = {
+        validationErrors: PropTypes.object // eslint-disable-line react/forbid-prop-types
     };
-};
+
+    return ValidatedComponent;
+});
 
 module.exports.defaultValidationHOC = module.exports.validationHOCFactory({
     isDefaultRequiredValue: <intl.FormattedMessage id="form.validationRequired" />

src/components/grid/grid.jsx

@@ -1,15 +1,61 @@
-var classNames = require('classnames');
-var React = require('react');
+const classNames = require('classnames');
+const PropTypes = require('prop-types');
+const React = require('react');
 
-var Thumbnail = require('../thumbnail/thumbnail.jsx');
-var FlexRow = require('../flex-row/flex-row.jsx');
+const Thumbnail = require('../thumbnail/thumbnail.jsx');
+const FlexRow = require('../flex-row/flex-row.jsx');
 
 require('./grid.scss');
 
-var Grid = React.createClass({
-    type: 'Grid',
-    getDefaultProps: function () {
-        return {
+const Grid = props => (
+    <div className={classNames('grid', props.className)}>
+        <FlexRow>
+            {props.items.map((item, key) => {
+                const href = `/${props.itemType}/${item.id}/`;
+                if (props.itemType === 'projects') {
+                    return (
+                        <Thumbnail
+                            avatar={`https://cdn2.scratch.mit.edu/get_image/user/${item.author.id}_32x32.png`}
+                            creator={item.author.username}
+                            favorites={item.stats.favorites}
+                            href={href}
+                            key={key}
+                            loves={item.stats.loves}
+                            remixes={item.stats.remixes}
+                            showAvatar={props.showAvatar}
+                            showFavorites={props.showFavorites}
+                            showLoves={props.showLoves}
+                            showRemixes={props.showRemixes}
+                            showViews={props.showViews}
+                            src={item.image}
+                            title={item.title}
+                            type={'project'}
+                            views={item.stats.views}
+                        />
+                    );
+                }
+                return (
+                    <Thumbnail
+                        href={href}
+                        key={key}
+                        owner={item.owner}
+                        src={item.image}
+                        title={item.title}
+                        type={'gallery'}
+                    />
+                );
+            })}
+        </FlexRow>
+    </div>
+);
+
+Grid.propTypes = {
+    className: PropTypes.string,
+    itemType: PropTypes.string,
+    items: PropTypes.arrayOf(PropTypes.object)
+};
+
+Grid.defaultProps = {
     items: require('./grid.json'),
     itemType: 'projects',
     showLoves: false,
@@ -17,63 +63,6 @@ var Grid = React.createClass({
     showRemixes: false,
     showViews: false,
     showAvatar: false
-        };
-    },
-    render: function () {
-        var classes = classNames(
-            'grid',
-            this.props.className
-        );
-        return (
-            <div className={classes}>
-                <FlexRow>
-                    {this.props.items.map(function (item, key) {
-                        var href = '/' + this.props.itemType + '/' + item.id + '/';
-
-                        if (this.props.itemType == 'projects') {
-                            return (
-                                <Thumbnail
-                                    key={key}
-                                    showLoves={this.props.showLoves}
-                                    showFavorites={this.props.showFavorites}
-                                    showRemixes={this.props.showRemixes}
-                                    showViews={this.props.showViews}
-                                    showAvatar={this.props.showAvatar}
-                                    type={'project'}
-                                    href={href}
-                                    title={item.title}
-                                    src={item.image}
-                                    avatar={
-                                       'https://uploads.scratch.mit.edu/users/avatars/' +
-                                       item.author.id +
-                                       '.png'
-                                    }
-                                    creator={item.author.username}
-                                    loves={item.stats.loves}
-                                    favorites={item.stats.favorites}
-                                    remixes={item.stats.remixes}
-                                    views={item.stats.views}
-                                />
-                            );
-                        }
-                        else {
-                            return (
-                                <Thumbnail
-                                    key={key}
-                                    type={'gallery'}
-                                    href={href}
-                                    title={item.title}
-                                    src={item.image}
-                                    srcDefault={'https://uploads.scratch.mit.edu/galleries/thumbnails/default.png'}
-                                    owner={item.owner}
-                                />
-                            );
-                        }
-                    }.bind(this))}
-                </FlexRow>
-            </div>
-        );
-    }
-});
+};
 
 module.exports = Grid;

src/components/informationpage/informationpage.jsx

@@ -1,39 +1,34 @@
-var classNames = require('classnames');
-var React = require('react');
-var TitleBanner = require('../../components/title-banner/title-banner.jsx');
+const classNames = require('classnames');
+const PropTypes = require('prop-types');
+const React = require('react');
+
+const TitleBanner = require('../../components/title-banner/title-banner.jsx');
 
 require('./informationpage.scss');
 
-/**
+/*
  * Container for a table of contents
  * alongside a long body of text
  */
-var InformationPage = React.createClass({
-    type: 'InformationPage',
-    propTypes: {
-        title: React.PropTypes.string.isRequired
-    },
-    render: function () {
-        var classes = classNames(
-            'info-outer',
-            'inner',
-            this.props.className
-        );
-        return (
+const InformationPage = props => (
     <div className="information-page">
         <TitleBanner className="masthead">
             <div className="inner">
                 <h1 className="title-banner-h1">
-                            {this.props.title}
+                    {props.title}
                 </h1>
             </div>
         </TitleBanner>
-                <div className={classes}>
-                    {this.props.children}
+        <div className={classNames('info-outer', 'inner', props.className)}>
+            {props.children}
         </div>
     </div>
-        );
-    }
-});
+);
+
+InformationPage.propTypes = {
+    children: PropTypes.node,
+    className: PropTypes.string,
+    title: PropTypes.string.isRequired
+};
 
 module.exports = InformationPage;

src/components/intro/intro.jsx

@@ -1,17 +1,180 @@
-var connect = require('react-redux').connect;
-var React = require('react');
+const bindAll = require('lodash.bindall');
+const connect = require('react-redux').connect;
+const PropTypes = require('prop-types');
+const React = require('react');
 
-var sessionActions = require('../../redux/session.js');
+const sessionActions = require('../../redux/session.js');
 
-var IframeModal = require('../modal/iframe/modal.jsx');
-var Registration = require('../registration/registration.jsx');
+const IframeModal = require('../modal/iframe/modal.jsx');
+const Registration = require('../registration/registration.jsx');
 
 require('./intro.scss');
 
-var Intro = React.createClass({
-    type: 'Intro',
-    getDefaultProps: function () {
-        return {
+class Intro extends React.Component {
+    constructor (props) {
+        super(props);
+        bindAll(this, [
+            'handleShowVideo',
+            'handleCloseVideo',
+            'handleJoinClick',
+            'handleCloseRegistration',
+            'handleCompleteRegistration'
+        ]);
+        this.state = {
+            videoOpen: false
+        };
+    }
+    handleShowVideo () {
+        this.setState({videoOpen: true});
+    }
+    handleCloseVideo () {
+        this.setState({videoOpen: false});
+    }
+    handleJoinClick (e) {
+        e.preventDefault();
+        this.setState({registrationOpen: true});
+    }
+    handleCloseRegistration () {
+        this.setState({registrationOpen: false});
+    }
+    handleCompleteRegistration () {
+        this.props.dispatch(sessionActions.refreshSession());
+        this.closeRegistration();
+    }
+    render () {
+        return (
+            <div className="intro">
+                <div className="content">
+                    <h1
+                        dangerouslySetInnerHTML={{ // eslint-disable-line react/no-danger
+                            __html: this.props.messages['intro.tagLine']
+                        }}
+                    />
+                    <div className="sprites">
+                        <a
+                            className="sprite sprite-1"
+                            href="/projects/editor/?tip_bar=getStarted"
+                        >
+                            <img
+                                alt="Scratch Cat"
+                                className="costume costume-1"
+                                src="//cdn.scratch.mit.edu/scratchr2/static/images/cat-a.png"
+                            />
+                            <img
+                                alt="Scratch Cat"
+                                className="costume costume-2"
+                                src="//cdn.scratch.mit.edu/scratchr2/static/images/cat-b.png"
+                            />
+                            <div className="circle" />
+                            <div className="text">
+                                {this.props.messages['intro.tryItOut']}
+                            </div>
+                        </a>
+                        <a
+                            className="sprite sprite-2"
+                            href="/starter_projects/"
+                        >
+                            <img
+                                alt="Tera"
+                                className="costume costume-1"
+                                src="//cdn.scratch.mit.edu/scratchr2/static/images/tera-a.png"
+                            />
+                            <img
+                                alt="Tera"
+                                className="costume costume-2"
+                                src="//cdn.scratch.mit.edu/scratchr2/static/images/tera-b.png"
+                            />
+                            <div className="circle" />
+                            <div className="text">
+                                {this.props.messages['intro.seeExamples']}
+                            </div>
+                        </a>
+                        <a
+                            className="sprite sprite-3"
+                            href="#"
+                            onClick={this.handleJoinClick}
+                        >
+                            <img
+                                alt="Gobo"
+                                className="costume costume-1"
+                                src="//cdn.scratch.mit.edu/scratchr2/static/images/gobo-a.png"
+                            />
+                            <img
+                                alt="Gobo"
+                                className="costume costume-2"
+                                src="//cdn.scratch.mit.edu/scratchr2/static/images/gobo-b.png"
+                            />
+                            <div className="circle" />
+                            <div className="text">
+                                {this.props.messages['intro.joinScratch']}
+                            </div>
+                            <div className="text subtext">{this.props.messages['intro.itsFree']}</div>
+                        </a>
+                        <Registration
+                            isOpen={this.state.registrationOpen}
+                            key="registration"
+                            onRegistrationDone={this.handleCompleteRegistration}
+                            onRequestClose={this.handleCloseRegistration}
+                        />
+                    </div>
+                    <div
+                        className="description"
+                        dangerouslySetInnerHTML={{ // eslint-disable-line react/no-danger
+                            __html: this.props.messages['intro.description']
+                        }}
+                    />
+                    <div className="links">
+                        <a href="/about/">
+                            {this.props.messages['intro.aboutScratch']}
+                        </a>
+                        <a href="/educators/">
+                            {this.props.messages['intro.forEducators']}
+                        </a>
+                        <a
+                            className="last"
+                            href="/parents/"
+                        >
+                            {this.props.messages['intro.forParents']}
+                        </a>
+                    </div>
+                </div>
+                <div className="video">
+                    <div
+                        className="play-button"
+                        onClick={this.handleShowVideo}
+                    />
+                    <img
+                        alt="Intro Video"
+                        src="//cdn.scratch.mit.edu/scratchr2/static/images/hp-video-screenshot.png"
+                    />
+                </div>
+                <IframeModal
+                    className="mod-intro-video"
+                    isOpen={this.state.videoOpen}
+                    src="//player.vimeo.com/video/65583694?title=0&amp;byline=0&amp;portrait=0"
+                    onRequestClose={this.handleCloseVideo}
+                />
+            </div>
+        );
+    }
+}
+
+Intro.propTypes = {
+    dispatch: PropTypes.func.isRequired,
+    messages: PropTypes.shape({
+        'intro.aboutScratch': PropTypes.string,
+        'intro.forEducators': PropTypes.string,
+        'intro.forParents': PropTypes.string,
+        'intro.itsFree': PropTypes.string,
+        'intro.joinScratch': PropTypes.string,
+        'intro.seeExamples': PropTypes.string,
+        'intro.tagLine': PropTypes.string,
+        'intro.tryItOut': PropTypes.string,
+        'intro.description': PropTypes.string
+    })
+};
+
+Intro.defaultProps = {
     messages: {
         'intro.aboutScratch': 'ABOUT SCRATCH',
         'intro.forEducators': 'FOR EDUCATORS',
@@ -25,121 +188,12 @@ var Intro = React.createClass({
                              'over 14 million </span>projects shared'
     },
     session: {}
-        };
-    },
-    getInitialState: function () {
-        return {
-            videoOpen: false
-        };
-    },
-    showVideo: function () {
-        this.setState({videoOpen: true});
-    },
-    closeVideo: function () {
-        this.setState({videoOpen: false});
-    },
-    handleJoinClick: function (e) {
-        e.preventDefault();
-        this.setState({'registrationOpen': true});
-    },
-    closeRegistration: function () {
-        this.setState({'registrationOpen': false});
-    },
-    completeRegistration: function () {
-        this.props.dispatch(sessionActions.refreshSession());
-        this.closeRegistration();
-    },
-    render: function () {
-        return (
-            <div className="intro">
-                <div className="content">
-                    <h1 dangerouslySetInnerHTML={{__html: this.props.messages['intro.tagLine']}}>
-                    </h1>
-                    <div className="sprites">
-                        <a className="sprite sprite-1" href="/projects/editor/?tip_bar=getStarted">
-                            <img
-                                className="costume costume-1"
-                                src="//cdn.scratch.mit.edu/scratchr2/static/images/cat-a.png"
-                                alt="Scratch Cat" />
-                            <img
-                                className="costume costume-2"
-                                src="//cdn.scratch.mit.edu/scratchr2/static/images/cat-b.png"
-                                alt="Scratch Cat" />
-                            <div className="circle"></div>
-                            <div className="text">
-                                {this.props.messages['intro.tryItOut']}
-                            </div>
-                        </a>
-                        <a className="sprite sprite-2" href="/starter_projects/">
-                            <img
-                                className="costume costume-1"
-                                src="//cdn.scratch.mit.edu/scratchr2/static/images/tera-a.png"
-                                alt="Tera" />
-                            <img
-                                className="costume costume-2"
-                                src="//cdn.scratch.mit.edu/scratchr2/static/images/tera-b.png"
-                                alt="Tera" />
-                            <div className="circle"></div>
-                            <div className="text">
-                                {this.props.messages['intro.seeExamples']}
-                            </div>
-                        </a>
-                        <a className="sprite sprite-3" href="#" onClick={this.handleJoinClick}>
-                            <img
-                                className="costume costume-1"
-                                src="//cdn.scratch.mit.edu/scratchr2/static/images/gobo-a.png"
-                                alt="Gobo" />
-                            <img
-                                className="costume costume-2"
-                                src="//cdn.scratch.mit.edu/scratchr2/static/images/gobo-b.png"
-                                alt="Gobo" />
-                            <div className="circle"></div>
-                            <div className="text">
-                                {this.props.messages['intro.joinScratch']}
-                            </div>
-                            <div className="text subtext">{this.props.messages['intro.itsFree']}</div>
-                        </a>
-                        <Registration key="registration"
-                                      isOpen={this.state.registrationOpen}
-                                      onRequestClose={this.closeRegistration}
-                                      onRegistrationDone={this.completeRegistration} />
-                    </div>
-                    <div className="description"
-                         dangerouslySetInnerHTML={{__html: this.props.messages['intro.description']}}></div>
-                    <div className="links">
-                        <a href="/about/">
-                            {this.props.messages['intro.aboutScratch']}
-                        </a>
-                        <a href="/educators/">
-                            {this.props.messages['intro.forEducators']}
-                        </a>
-                        <a className="last" href="/parents/">
-                            {this.props.messages['intro.forParents']}
-                        </a>
-                    </div>
-                </div>
-                <div className="video">
-                    <div className="play-button" onClick={this.showVideo}></div>
-                    <img src="//cdn.scratch.mit.edu/scratchr2/static/images/hp-video-screenshot.png"
-                         alt="Intro Video" />
-                </div>
-                <IframeModal
-                    className="mod-intro-video"
-                    isOpen={this.state.videoOpen}
-                    onRequestClose={this.closeVideo}
-                    src="//player.vimeo.com/video/65583694?title=0&amp;byline=0&amp;portrait=0"
-                />
-            </div>
-        );
-    }
-});
-
-var mapStateToProps = function (state) {
-    return {
-        session: state.session
-    };
 };
 
-var ConnectedIntro = connect(mapStateToProps)(Intro);
+const mapStateToProps = state => ({
+    session: state.session
+});
+
+const ConnectedIntro = connect(mapStateToProps)(Intro);
 
 module.exports = ConnectedIntro;

src/components/languagechooser/languagechooser.jsx

@@ -1,46 +1,57 @@
-var classNames = require('classnames');
-var React = require('react');
+const bindAll = require('lodash.bindall');
+const classNames = require('classnames');
+const PropTypes = require('prop-types');
+const React = require('react');
 
-var jar  = require('../../lib/jar.js');
-var languages = require('../../../languages.json');
-var Form = require('../forms/form.jsx');
-var Select = require('../forms/select.jsx');
+const jar = require('../../lib/jar.js');
+const languages = require('../../../languages.json');
+const Form = require('../forms/form.jsx');
+const Select = require('../forms/select.jsx');
 
 require('./languagechooser.scss');
 
 /**
  * Footer dropdown menu that allows one to change their language.
  */
-var LanguageChooser = React.createClass({
-    type: 'LanguageChooser',
-    getDefaultProps: function () {
-        return {
-            languages: languages,
-            locale: 'en'
-        };
-    },
-    onSetLanguage: function (name, value) {
+class LanguageChooser extends React.Component {
+    constructor (props) {
+        super(props);
+        bindAll(this, [
+            'handleSetLanguage'
+        ]);
+    }
+    handleSetLanguage (name, value) {
         jar.set('scratchlanguage', value);
         window.location.reload();
-    },
-    render: function () {
-        var classes = classNames(
-            'language-chooser',
-            this.props.className
-        );
-        var languageOptions = Object.keys(this.props.languages).map(function (value) {
-            return {value: value, label: this.props.languages[value]};
-        }.bind(this));
+    }
+    render () {
+        const languageOptions = Object.keys(this.props.languages).map(value => ({
+            value: value,
+            label: this.props.languages[value]
+        }));
         return (
-            <Form className={classes}>
-                <Select name="language"
+            <Form className={classNames('language-chooser', this.props.className)}>
+                <Select
+                    required
+                    name="language"
                     options={languageOptions}
                     value={this.props.locale}
-                        onChange={this.onSetLanguage}
-                        required />
+                    onChange={this.handleSetLanguage}
+                />
             </Form>
         );
     }
-});
+}
+
+LanguageChooser.propTypes = {
+    className: PropTypes.string,
+    languages: PropTypes.object, // eslint-disable-line react/forbid-prop-types
+    locale: PropTypes.string
+};
+
+LanguageChooser.defaultProps = {
+    languages: languages,
+    locale: 'en'
+};
 
 module.exports = LanguageChooser;

src/components/login/login.jsx

@@ -1,66 +1,108 @@
-var React = require('react');
-var FormattedMessage = require('react-intl').FormattedMessage;
+const bindAll = require('lodash.bindall');
+const FormattedMessage = require('react-intl').FormattedMessage;
+const PropTypes = require('prop-types');
+const React = require('react');
 
-var log = require('../../lib/log.js');
+const log = require('../../lib/log.js');
 
-var Form = require('../forms/form.jsx');
-var Input = require('../forms/input.jsx');
-var Button = require('../forms/button.jsx');
-var Spinner = require('../spinner/spinner.jsx');
+const Form = require('../forms/form.jsx');
+const Input = require('../forms/input.jsx');
+const Button = require('../forms/button.jsx');
+const Spinner = require('../spinner/spinner.jsx');
 
 require('./login.scss');
 
-var Login = React.createClass({
-    type: 'Login',
-    propTypes: {
-        onLogIn: React.PropTypes.func,
-        error: React.PropTypes.string
-    },
-    getInitialState: function () {
-        return {
+class Login extends React.Component {
+    constructor (props) {
+        super(props);
+        bindAll(this, [
+            'handleSubmit'
+        ]);
+        this.state = {
             waiting: false
         };
-    },
-    handleSubmit: function (formData) {
+    }
+    handleSubmit (formData) {
         this.setState({waiting: true});
-        this.props.onLogIn(formData, function (err) {
+        this.props.onLogIn(formData, err => {
             if (err) log.error(err);
             this.setState({waiting: false});
-        }.bind(this));
-    },
-    render: function () {
-        var error;
+        });
+    }
+    render () {
+        let error;
         if (this.props.error) {
             error = <div className="error">{this.props.error}</div>;
         }
         return (
             <div className="login">
                 <Form onSubmit={this.handleSubmit}>
-                    <label htmlFor="username" key="usernameLabel">
-                        <FormattedMessage id='general.username' />
+                    <label
+                        htmlFor="username"
+                        key="usernameLabel"
+                    >
+                        <FormattedMessage id="general.username" />
                     </label>
-                    <Input type="text" ref="username" name="username" maxLength="30" key="usernameInput" required />
-                    <label htmlFor="password" key="passwordLabel">
-                        <FormattedMessage id='general.password' />
+                    <Input
+                        required
+                        key="usernameInput"
+                        maxLength="30"
+                        name="username"
+                        ref={input => {
+                            this.username = input;
+                        }}
+                        type="text"
+                    />
+                    <label
+                        htmlFor="password"
+                        key="passwordLabel"
+                    >
+                        <FormattedMessage id="general.password" />
                     </label>
-                    <Input type="password" ref="password" name="password" key="passwordInput" required />
+                    <Input
+                        required
+                        key="passwordInput"
+                        name="password"
+                        ref={input => {
+                            this.password = input;
+                        }}
+                        type="password"
+                    />
                     {this.state.waiting ? [
-                        <Button className="submit-button white" type="submit" disabled="disabled" key="submitButton">
+                        <Button
+                            className="submit-button white"
+                            disabled="disabled"
+                            key="submitButton"
+                            type="submit"
+                        >
                             <Spinner />
                         </Button>
                     ] : [
-                        <Button className="submit-button white" type="submit" key="submitButton">
-                            <FormattedMessage id='general.signIn' />
+                        <Button
+                            className="submit-button white"
+                            key="submitButton"
+                            type="submit"
+                        >
+                            <FormattedMessage id="general.signIn" />
                         </Button>
                     ]}
-                    <a className="right" href="/accounts/password_reset/" key="passwordResetLink">
-                        <FormattedMessage id='login.needHelp' />
+                    <a
+                        className="right"
+                        href="/accounts/password_reset/"
+                        key="passwordResetLink"
+                    >
+                        <FormattedMessage id="login.needHelp" />
                     </a>
                     {error}
                 </Form>
             </div>
         );
     }
-});
+}
+
+Login.propTypes = {
+    error: PropTypes.string,
+    onLogIn: PropTypes.func
+};
 
 module.exports = Login;

src/components/masonrygrid/masonrygrid.jsx

@@ -1,60 +1,68 @@
-var classNames = require('classnames');
-var React = require('react');
-var MediaQuery = require('react-responsive');
-var frameless = require('../../lib/frameless');
+const bindAll = require('lodash.bindall');
+const classNames = require('classnames');
+const MediaQuery = require('react-responsive').default;
+const PropTypes = require('prop-types');
+const React = require('react');
+
+const frameless = require('../../lib/frameless');
 
 require('./masonrygrid.scss');
 
-var MasonryGrid = React.createClass({
-    type: 'MasonryGrid',
-    getDefaultProps: function () {
-        return {
-            as: 'div'
-        };
-    },
-    reorderColumns: function (items, cols) {
-        var a1 = [];
-        var a2 = [];
-        var a3 = [];
-        var i = 0;
-        //only implemented for 2 and 3 columns so far - easy to extend if needed
+class MasonryGrid extends React.Component {
+    constructor (props) {
+        super(props);
+        bindAll(this, [
+            'reorderColumns'
+        ]);
+    }
+    reorderColumns (items, cols) {
+        const a1 = [];
+        const a2 = [];
+        const a3 = [];
+        let i = 0;
+        // only implemented for 2 and 3 columns so far - easy to extend if needed
         if (cols > 1 && cols < 4) {
-            for (i=0;i<items.length;i++){
-                var col = (i+cols)%cols;
+            for (i = 0; i < items.length; i++){
+                const col = (i + cols) % cols;
                 if (col === 0) {
                     a1.push(items[i]);
-                }
-                else if (col === 1) {
+                } else if (col === 1) {
                     a2.push(items[i]);
-                }
-                else if (col === 2) {
+                } else if (col === 2) {
                     a3.push(items[i]);
                 }
             }
-            return a1.concat(a2,a3);
-        } else {
+            return a1.concat(a2, a3);
+        }
         return items;
     }
-    },
-    render: function () {
-        var classes = classNames(
-            'masonry',
-            this.props.className
-        );
+    render () {
         return (
-            <this.props.as className={classes}>
-                <MediaQuery maxWidth={frameless.tablet - 1} >
+            <this.props.as className={classNames('masonry', this.props.className)}>
+                <MediaQuery maxWidth={frameless.tablet - 1}>
                     {this.props.children}
                 </MediaQuery>
-                <MediaQuery minWidth={frameless.tablet} maxWidth={frameless.desktop - 1} >
+                <MediaQuery
+                    maxWidth={frameless.desktop - 1}
+                    minWidth={frameless.tablet}
+                >
                     {this.reorderColumns(this.props.children, 2)}
                 </MediaQuery>
-                <MediaQuery minWidth={frameless.desktop} >
+                <MediaQuery minWidth={frameless.desktop}>
                     {this.reorderColumns(this.props.children, 3)}
                 </MediaQuery>
             </this.props.as>
         );
     }
-});
+}
+
+MasonryGrid.propTypes = {
+    children: PropTypes.node,
+    className: PropTypes.string
+};
+
+MasonryGrid.defaultProps = {
+    as: 'div'
+};
 
 module.exports = MasonryGrid;

src/components/microworld/microworld.jsx

@@ -1,39 +1,53 @@
-var React = require('react');
+const bindAll = require('lodash.bindall');
+const PropTypes = require('prop-types');
+const React = require('react');
+
+const Box = require('../box/box.jsx');
+const LegacyCarousel = require('../carousel/legacy-carousel.jsx');
+const IframeModal = require('../modal/iframe/modal.jsx');
+const NestedCarousel = require('../nestedcarousel/nestedcarousel.jsx');
 
 require('./microworld.scss');
 
-var Box = require('../box/box.jsx');
-var LegacyCarousel = require('../carousel/legacy-carousel.jsx');
-var IframeModal = require('../modal/iframe/modal.jsx');
-var NestedCarousel = require('../nestedcarousel/nestedcarousel.jsx');
-
-var Microworld = React.createClass({
-    type: 'Microworld',
-    propTypes: {
-        microworldData: React.PropTypes.node.isRequired
-    },
-    markVideoOpen: function (key) {
-        {/* When a video is clicked, mark it as an open video, so the video Modal will open.
-        Key is the number of the video, so distinguish between different videos on the page */}
-
-        var videoOpenArr = this.state.videoOpen;
-        videoOpenArr[key] = true;
-        this.setState({videoOpen: videoOpenArr});
-    },
-    markVideoClosed: function (key) {
-        {/* When a video's x is clicked, mark it as closed, so the video Modal will disappear.
-        Key is the number of the video, so distinguish between different videos on the page */}
-        var videoOpenArr = this.state.videoOpen;
-        videoOpenArr[key] = false;
-        this.setState({videoOpen: videoOpenArr});
-    },
-    getInitialState: function () {
-        return {
+class Microworld extends React.Component {
+    constructor (props) {
+        super(props);
+        bindAll(this, [
+            'markVideoOpen',
+            'markVideoClosed',
+            'renderVideos',
+            'renderVideo',
+            'renderEditorWindow',
+            'renderTips',
+            'renderStarterProject',
+            'renderProjectIdeasBox',
+            'renderForum',
+            'renderDesignStudio'
+        ]);
+        this.state = {
             videoOpen: {}
         };
-    },
-    renderVideos: function () {
-        var videos = this.props.microworldData.videos;
+    }
+    markVideoOpen (key) {
+        /* 
+            When a video is clicked, mark it as an open video, so the video Modal will open.
+            Key is the number of the video, so distinguish between different videos on the page
+        */
+        const videoOpenArr = this.state.videoOpen;
+        videoOpenArr[key] = true;
+        this.setState({videoOpen: videoOpenArr});
+    }
+    markVideoClosed (key) {
+        /*
+            When a video's x is clicked, mark it as closed, so the video Modal will disappear.
+            Key is the number of the video, so distinguish between different videos on the page
+        */
+        const videoOpenArr = this.state.videoOpen;
+        videoOpenArr[key] = false;
+        this.setState({videoOpen: videoOpenArr});
+    }
+    renderVideos () {
+        const videos = this.props.microworldData.videos;
         if (!videos || videos.length <= 0) {
             return null;
         }
@@ -48,26 +62,32 @@ var Microworld = React.createClass({
                 </div>
             </div>
         );
-    },
-    renderVideo: function (video, key) {
+    }
+    renderVideo (video, key) {
         return (
             <div>
                 <div className="video">
-                    <div className="play-button" onClick={this.markVideoOpen.bind(this, key)}>
-                    </div>
+                    <div
+                        className="play-button"
+                        onClick={() => { // eslint-disable-line react/jsx-no-bind
+                            this.markVideoOpen(key);
+                        }}
+                    />
                     <img src={video.image} />
                 </div>
                 <IframeModal
                     className="mod-microworld-video"
                     isOpen={this.state.videoOpen[key]}
-                    onRequestClose={this.markVideoClosed.bind(this, key)}
                     src={video.link}
+                    onRequestClose={() => { // eslint-disable-line react/jsx-no-bind
+                        this.markVideoClosed(key);
+                    }}
                 />
             </div>
         );
-    },
-    renderEditorWindow: function () {
-        var projectId = this.props.microworldData.microworld_project_id;
+    }
+    renderEditorWindow () {
+        const projectId = this.props.microworldData.microworld_project_id;
         
         if (!projectId) {
             return null;
@@ -75,30 +95,37 @@ var Microworld = React.createClass({
         return (
             <div className="editor section">
                 <h1 className="sectionheader">Start Creating!</h1>
-                <iframe src={'//scratch.mit.edu/projects/embed-editor/' + projectId + '/?isMicroworld=true'}
-                        frameBorder="0"> </iframe>
+                <iframe
+                    frameBorder="0"
+                    src={`//scratch.mit.edu/projects/embed-editor/${projectId}/?isMicroworld=true`}
+                />
                 {this.renderTips()}
             </div>
         );
-    },
-    renderTips: function () {
-        var tips =  this.props.microworldData.tips;
+    }
+    renderTips () {
+        const tips = this.props.microworldData.tips;
         if (!tips || tips.length <= 0) {
             return null;
         }
 
         return (
             <div className="box nestedcarousel">
-                <div className="box-header">
-                </div>
+                <div className="box-header" />
                 <div className="box-content">
-                    <NestedCarousel items={tips} settings={{slidesToShow:1,slidesToScroll:1}}/>
+                    <NestedCarousel
+                        items={tips}
+                        settings={{
+                            slidesToShow: 1,
+                            slidesToScroll: 1
+                        }}
+                    />
                 </div>
             </div>
         );
-    },
-    renderStarterProject: function () {
-        var starterProjects = this.props.microworldData.starter_projects;
+    }
+    renderStarterProject () {
+        const starterProjects = this.props.microworldData.starter_projects;
         if (!starterProjects || starterProjects.length <= 0){
             return null;
         }
@@ -107,28 +134,30 @@ var Microworld = React.createClass({
             <div className="project-ideas">
                 <h1 className="sectionheader">Check out ideas for more projects</h1>
                 <Box
+                    key="starter_projects"
                     title="More Starter Projects"
-                    key="starter_projects">
+                >
                     <LegacyCarousel items={starterProjects} />
                 </Box>
             </div>
         );
-    },
-    renderProjectIdeasBox: function () {
-        var communityProjects = this.props.microworldData.community_projects;
+    }
+    renderProjectIdeasBox () {
+        const communityProjects = this.props.microworldData.community_projects;
         if (!communityProjects || communityProjects.size <= 0) {
             return null;
         }
 
-        var featured = communityProjects.featured_projects;
-        var all = communityProjects.newest_projects;
+        const featured = communityProjects.featured_projects;
+        const all = communityProjects.newest_projects;
 
-        var rows = [];
+        const rows = [];
         if (featured && featured.length > 0){
             rows.push(
                 <Box
+                    key="community_featured_projects"
                     title="Featured Community Projects"
-                    key="community_featured_projects">
+                >
                     <LegacyCarousel items={featured} />
                 </Box>
             );
@@ -136,8 +165,9 @@ var Microworld = React.createClass({
         if (all && all.length > 0) {
             rows.push(
                 <Box
+                    key="community_all_projects"
                     title="All Community Projects"
-                     key="community_all_projects">
+                >
                     <LegacyCarousel items={all} />
                 </Box>
             );
@@ -151,8 +181,8 @@ var Microworld = React.createClass({
                 {rows}
             </div>
         );
-    },
-    renderForum: function () {
+    }
+    renderForum () {
         if (!this.props.microworldData.show_forum) {
             return null;
         }
@@ -160,58 +190,79 @@ var Microworld = React.createClass({
         return (
             <div className="forum">
                 <h1 className="sectionheader">Chat with others!</h1>
-            <img src="/images/forum-image.png"/>
+                <img src="/images/forum-image.png" />
             </div>
         );
-    },
-    renderDesignStudio: function () {
-        var designChallenge = this.props.microworldData.design_challenge;
+    }
+    renderDesignStudio () {
+        const designChallenge = this.props.microworldData.design_challenge;
         if (!designChallenge) {
             return null;
         }
+
+        let studioHref = '';
         if (designChallenge.studio_id) {
-            var studioHref = 'https://scratch.mit.edu//studios/' + designChallenge.studio_id + '/';
+            studioHref = `https://scratch.mit.edu//studios/${designChallenge.studio_id}/`;
         }
         if (designChallenge.project_id) {
             return (
                 <div className="side-by-side section">
                     <h1 className="sectionheader">Join our Design Challenge!</h1>
                     <div className="design-studio">
-                        <iframe src={'https://scratch.mit.edu/projects/' + designChallenge.project_id +
-                                     '/#fullscreen'} frameBorder="0"> </iframe>
+                        <iframe
+                            frameBorder="0"
+                            src={`https://scratch.mit.edu/projects/${designChallenge.project_id}/#fullscreen`}
+                        />
                     </div>
                     <div className="design-studio-projects">
-                        <Box title="Examples"
+                        <Box
                             key="scratch_design_studio"
+                            moreHref={studioHref ? studioHref : null}
                             moreTitle={studioHref ? 'Visit the studio' : null}
-                             moreHref={studioHref ? studioHref : null}>
+                            title="Examples"
+                        >
                             {/* The two carousels are used to show two rows of projects, one above the
                                 other. This should be probably be changed, to allow better scrolling. */}
-                            <LegacyCarousel settings={{slidesToShow:2,slidesToScroll:2}}
-                                      items={this.props.microworldData.design_challenge.studio1} />
-                            <LegacyCarousel settings={{slidesToShow:2,slidesToScroll:2}}
-                                      items={this.props.microworldData.design_challenge.studio2} />
+                            <LegacyCarousel
+                                items={this.props.microworldData.design_challenge.studio1}
+                                settings={{
+                                    slidesToShow: 2,
+                                    slidesToScroll: 2
+                                }}
+                            />
+                            <LegacyCarousel
+                                items={this.props.microworldData.design_challenge.studio2}
+                                settings={{
+                                    slidesToShow: 2,
+                                    slidesToScroll: 2
+                                }}
+                            />
                         </Box>
                     </div>
                 </div>
             );
-        } else {
+        }
         return (
             <div className="section">
                 <h1 className="sectionheader">Join our Design Challenge!</h1>
                 <Box
-                        title="design Challenge Projects"
                     key="scratch_design_studio"
+                    moreHref={studioHref ? studioHref : null}
                     moreTitle={studioHref ? 'Visit the studio' : null}
-                        moreHref={studioHref ? studioHref : null}>
-                        <LegacyCarousel items={this.props.microworldData.design_challenge.studio1.concat(
-                            this.props.microworldData.design_challenge.studio2)} />
-                   </Box>
+                    title="design Challenge Projects"
+                >
+                    <LegacyCarousel
+                        items={
+                            this.props.microworldData.design_challenge.studio1.concat(
+                                this.props.microworldData.design_challenge.studio2
+                            )
+                        }
+                    />
+               `</Box>
             </div>
         );
     }
-    },
-    render: function () {
+    render () {
         return (
             <div className="inner microworld">
                 <div className="top-banner section">
@@ -231,6 +282,10 @@ var Microworld = React.createClass({
 
         );
     }
-});
+}
+
+Microworld.propTypes = {
+    microworldData: PropTypes.node.isRequired
+};
 
 module.exports = Microworld;

src/components/modal/base/modal.jsx

@@ -1,7 +1,9 @@
-var classNames = require('classnames');
-var omit = require('lodash.omit');
-var React = require('react');
-var ReactModal = require('react-modal');
+const bindAll = require('lodash.bindall');
+const classNames = require('classnames');
+const omit = require('lodash.omit');
+const PropTypes = require('prop-types');
+const React = require('react');
+const ReactModal = require('react-modal');
 
 require('./modal.scss');
 
@@ -10,47 +12,55 @@ ReactModal.setAppElement(document.getElementById('view'));
 /**
  * Container for pop up windows (See: registration window)
  */
-var Modal = React.createClass({
-    type: 'Modal',
-    propTypes: {
-        className: React.PropTypes.string,
-        overlayClassName: React.PropTypes.string
-    },
-    requestClose: function () {
+class Modal extends React.Component {
+    constructor (props) {
+        super(props);
+        bindAll(this, [
+            'handleRequestClose'
+        ]);
+    }
+    handleRequestClose () {
         return this.modal.portal.requestClose();
-    },
-    render: function () {
-        var modalClasses = classNames(
-            'modal-content',
-            this.props.className
-        );
-        var overlayClasses = classNames(
-            'modal-overlay',
-            this.props.overlayClassName
-        );
-        
+    }
+    render () {
         return (
             <ReactModal
-                ref={
-                    function (component) {
+                appElement={document.getElementById('view')}
+                className={{
+                    base: classNames('modal-content', this.props.className),
+                    afterOpen: classNames('modal-content', this.props.className),
+                    beforeClose: classNames('modal-content', this.props.className)
+                }}
+                overlayClassName={{
+                    base: classNames('modal-overlay', this.props.overlayClassName),
+                    afterOpen: classNames('modal-overlay', this.props.overlayClassName),
+                    beforeClose: classNames('modal-overlay', this.props.overlayClassName)
+                }}
+                ref={component => {
                     this.modal = component;
-                    }.bind(this)
-                }
-                className={modalClasses}
-                overlayClassName={overlayClasses}
+                }}
                 {...omit(this.props, ['className', 'overlayClassName'])}
             >
-                <div className="modal-content-close" onClick={this.requestClose}>
+                <div
+                    className="modal-content-close"
+                    onClick={this.handleRequestClose}
+                >
                     <img
+                        alt="close-icon"
                         className="modal-content-close-img"
                         src="/svgs/modal/close-x.svg"
-                        alt="close-icon"
                     />
                 </div>
                 {this.props.children}
             </ReactModal>
         );
     }
-});
+}
+
+Modal.propTypes = {
+    children: PropTypes.node,
+    className: PropTypes.string,
+    overlayClassName: PropTypes.string
+};
 
 module.exports = Modal;

src/components/modal/base/modal.scss

@@ -21,7 +21,7 @@
     background-color: transparentize($ui-blue, .3);
 }
 
-.ReactModal__Content:focus {
+.modal-content:focus {
     outline: none;
 }
 

src/components/modal/iframe/modal.jsx

@@ -1,34 +1,28 @@
-var classNames = require('classnames');
-var omit = require('lodash.omit');
-var React = require('react');
+const classNames = require('classnames');
+const omit = require('lodash.omit');
+const PropTypes = require('prop-types');
+const React = require('react');
 
-var Modal = require('../base/modal.jsx');
+const Modal = require('../base/modal.jsx');
 
 require('./modal.scss');
 
-var IframeModal = React.createClass({
-    propTypes: {
-        isOpen: React.PropTypes.bool,
-        onRequestClose: React.PropTypes.func,
-        className: React.PropTypes.string,
-        componentRef: React.PropTypes.func,
-        src: React.PropTypes.string
-    },
-    render: function () {
-        var iframeClasses = classNames(
-            'modal-content-iframe',
-            this.props.className
-        );
-        return (
-            <Modal {...omit(this.props, ['src'])}>
+const IframeModal = props => (
+    <Modal {...omit(props, ['src'])}>
         <iframe
-                    ref={this.props.componentRef}
-                    src={this.props.src}
-                    className={iframeClasses}
+            className={classNames('modal-content-iframe', props.className)}
+            ref={props.componentRef}
+            src={props.src}
         />
     </Modal>
-        );
-    }
-});
+);
+
+IframeModal.propTypes = {
+    className: PropTypes.string,
+    componentRef: PropTypes.func,
+    isOpen: PropTypes.bool,
+    onRequestClose: PropTypes.func,
+    src: PropTypes.string
+};
 
 module.exports = IframeModal;

src/components/modal/ttt/modal.jsx

@@ -1,28 +1,23 @@
-var FormattedMessage = require('react-intl').FormattedMessage;
-var MediaQuery = require('react-responsive');
-var omit = require('lodash.omit');
-var React = require('react');
+const FormattedMessage = require('react-intl').FormattedMessage;
+const MediaQuery = require('react-responsive').default;
+const omit = require('lodash.omit');
+const PropTypes = require('prop-types');
+const React = require('react');
 
-var FlexRow = require('../../flex-row/flex-row.jsx');
-var frameless = require('../../../lib/frameless');
-var Modal = require('../base/modal.jsx');
-var TitleBanner = require('../../title-banner/title-banner.jsx');
+const FlexRow = require('../../flex-row/flex-row.jsx');
+const frameless = require('../../../lib/frameless');
+const Modal = require('../base/modal.jsx');
+const TitleBanner = require('../../title-banner/title-banner.jsx');
 
 require('../../forms/button.scss');
 require('./modal.scss');
 
-var TTTModal = React.createClass({
-    propTypes: {
-        title: React.PropTypes.string.isRequired,
-        description: React.PropTypes.string.isRequired,
-        tutorialLoc: React.PropTypes.string.isRequired,
-        activityLoc: React.PropTypes.string.isRequired,
-        guideLoc: React.PropTypes.string.isRequired,
-        thumbUrl: React.PropTypes.string.isRequired,
-        bannerUrl: React.PropTypes.string.isRequired
-    },
-    render: function () {
-        var modalOmit = [
+const TTTModal = props => (
+    <Modal
+        className="mod-ttt"
+        {...omit(
+            props,
+            [
                 'title',
                 'description',
                 'tutorialLoc',
@@ -30,32 +25,40 @@ var TTTModal = React.createClass({
                 'guideLoc',
                 'thumbUrl',
                 'bannerUrl'
-        ];
-        return (
-            <Modal
-                className="mod-ttt"
-                {...omit(this.props, modalOmit)}
+            ]
+        )}
     >
         <TitleBanner className="mod-ttt">
             <MediaQuery minWidth={frameless.mobile}>
-                        <img className="mod-ttt-img" src={this.props.bannerUrl} alt="" />
+                <img
+                    alt=""
+                    className="mod-ttt-img"
+                    src={props.bannerUrl}
+                />
             </MediaQuery>
             <MediaQuery maxWidth={frameless.mobile - 1}>
-                        <img className="mod-ttt-img" src={this.props.thumbUrl} alt="" />
+                <img
+                    alt=""
+                    className="mod-ttt-img"
+                    src={props.thumbUrl}
+                />
             </MediaQuery>
         </TitleBanner>
         <div className="ttt-title">
-                    <h2>{this.props.title}</h2>
-                    <p className="ttt-description">{this.props.description}</p>
+            <h2>{props.title}</h2>
+            <p className="ttt-description">{props.description}</p>
         </div>
         <ul className="modal-content-ttt">
-                    <FlexRow as="li" className="mod-ttt-item">
+            <FlexRow
+                as="li"
+                className="mod-ttt-item"
+            >
                 <div className="modal-content-ttt-text">
                     <div className="modal-content-ttt-title">
                         <img
+                            alt="tutorial-icon"
                             className="modal-content-ttt-title-img"
                             src="/svgs/ttt/tutorial.svg"
-                                    alt="tutorial-icon"
                         />
                         <FormattedMessage id="ttt.tutorial" />
                     </div>
@@ -64,19 +67,22 @@ var TTTModal = React.createClass({
                     </p>
                 </div>
                 <a
-                            href={this.props.tutorialLoc}
                     className="button white mod-ttt-item"
+                    href={props.tutorialLoc}
                 >
                     <FormattedMessage id="tile.tryIt" />
                 </a>
             </FlexRow>
-                    <FlexRow as="li" className="mod-ttt-item">
+            <FlexRow
+                as="li"
+                className="mod-ttt-item"
+            >
                 <div className="modal-content-ttt-text">
                     <div className="modal-content-ttt-title">
                         <img
+                            alt="activity-cards-icon"
                             className="modal-content-ttt-title-img"
                             src="/svgs/ttt/activity-cards.svg"
-                                    alt="activity-cards-icon"
                         />
                         <FormattedMessage id="ttt.activityTitle" />
                     </div>
@@ -85,19 +91,22 @@ var TTTModal = React.createClass({
                     </p>
                 </div>
                 <a
-                            href={this.props.activityLoc}
                     className="button white mod-ttt-item"
+                    href={props.activityLoc}
                 >
                     <FormattedMessage id="ttt.open" />
                 </a>
             </FlexRow>
-                    <FlexRow as="li" className="mod-ttt-item">
+            <FlexRow
+                as="li"
+                className="mod-ttt-item"
+            >
                 <div className="modal-content-ttt-text">
                     <div className="modal-content-ttt-title">
                         <img
+                            alt="educator-guide-icon"
                             className="modal-content-ttt-title-img"
                             src="/svgs/ttt/educator-guide.svg"
-                                    alt="educator-guide-icon"
                         />
                         <FormattedMessage id="ttt.educatorTitle" />
                     </div>
@@ -106,16 +115,24 @@ var TTTModal = React.createClass({
                     </p>
                 </div>
                 <a
-                            href={this.props.guideLoc}
                     className="button white mod-ttt-item"
+                    href={props.guideLoc}
                 >
                     <FormattedMessage id="ttt.open" />
                 </a>
             </FlexRow>
         </ul>
     </Modal>
-        );
-    }
-});
+);
+
+TTTModal.propTypes = {
+    activityLoc: PropTypes.string.isRequired,
+    bannerUrl: PropTypes.string.isRequired,
+    description: PropTypes.string.isRequired,
+    guideLoc: PropTypes.string.isRequired,
+    thumbUrl: PropTypes.string.isRequired,
+    title: PropTypes.string.isRequired,
+    tutorialLoc: PropTypes.string.isRequired
+};
 
 module.exports = TTTModal;

src/components/navigation/base/navigation.jsx

@@ -1,21 +1,18 @@
-var classNames = require('classnames');
-var React = require('react');
+const classNames = require('classnames');
+const PropTypes = require('prop-types');
+const React = require('react');
 
 require('./navigation.scss');
 
-var NavigationBox = React.createClass({
-    type: 'NavigationBox',
-    render: function () {
-        var classes = classNames(
-            'inner',
-            this.props.className
-        );
-        return (
-            <div className={classes}>
-                {this.props.children}
+const NavigationBox = props => (
+    <div className={classNames('inner', props.className)}>
+        {props.children}
     </div>
-        );
-    }
-});
+);
+
+NavigationBox.propTypes = {
+    children: PropTypes.node,
+    className: PropTypes.string
+};
 
 module.exports = NavigationBox;

src/components/navigation/conference/2016/navigation.jsx

@@ -1,21 +1,21 @@
-var React = require('react');
+const React = require('react');
 
-var NavigationBox = require('../../base/navigation.jsx');
+const NavigationBox = require('../../base/navigation.jsx');
 
 require('./navigation.scss');
 
-var Navigation = React.createClass({
-    type: 'Navigation',
-    render: function () {
-        return (
+const Navigation = () => (
     <NavigationBox>
         <ul className="ul mod-2016">
             <li className="li-left mod-logo mod-2016">
-                        <a href="/conference/2016" className="logo-a">
+                <a
+                    className="logo-a"
+                    href="/conference/2016"
+                >
                     <img
-                                src="/images/logo_sm.png"
                         alt="Scratch Logo"
                         className="logo-a-image"
+                        src="/images/logo_sm.png"
                     />
                     <p className="logo-a-title">Conference</p>
                 </a>
@@ -23,20 +23,33 @@ var Navigation = React.createClass({
             <li className="li-right mod-2016">
                 <ul className="li-right-ul mod-2016">
                     <li className="link expect">
-                                <a href="/conference/2016/expect" className="link-a">What to Expect</a>
+                        <a
+                            className="link-a"
+                            href="/conference/2016/expect"
+                        >
+                            What to Expect
+                        </a>
                     </li>
                     <li className="link plan">
-                                <a href="/conference/2016/plan" className="link-a">Plan Your Visit</a>
+                        <a
+                            className="link-a"
+                            href="/conference/2016/plan"
+                        >
+                            Plan Your Visit
+                        </a>
                     </li>
                     <li className="link schedule">
-                                <a href="/conference/2016/schedule" className="link-a">Schedule</a>
+                        <a
+                            className="link-a"
+                            href="/conference/2016/schedule"
+                        >
+                            Schedule
+                        </a>
                     </li>
                 </ul>
             </li>
         </ul>
     </NavigationBox>
-        );
-    }
-});
+);
 
 module.exports = Navigation;

src/components/navigation/conference/2017/navigation.jsx

@@ -1,29 +1,27 @@
-var React = require('react');
+const React = require('react');
 
-var NavigationBox = require('../../base/navigation.jsx');
+const NavigationBox = require('../../base/navigation.jsx');
 
 require('./navigation.scss');
 
-var Navigation = React.createClass({
-    type: 'Navigation',
-    render: function () {
-        return (
+const Navigation = () => (
     <NavigationBox>
         <ul className="ul mod-2017">
             <li className="li-left mod-logo mod-2017">
-                        <a href="/conference" className="logo-a">
+                <a
+                    className="logo-a"
+                    href="/conference"
+                >
                     <img
-                                src="/images/logo_sm.png"
                         alt="Scratch Logo"
                         className="logo-a-image"
+                        src="/images/logo_sm.png"
                     />
                     <p className="logo-a-title">Conferences</p>
                 </a>
             </li>
         </ul>
     </NavigationBox>
-        );
-    }
-});
+);
 
 module.exports = Navigation;

src/components/navigation/conference/2018/navigation.jsx

@@ -1,29 +1,27 @@
-var React = require('react');
+const React = require('react');
 
-var NavigationBox = require('../../base/navigation.jsx');
+const NavigationBox = require('../../base/navigation.jsx');
 
 require('./navigation.scss');
 
-var Navigation = React.createClass({
-    type: 'Navigation',
-    render: function () {
-        return (
+const Navigation = () => (
     <NavigationBox>
         <ul className="ul mod-2018">
             <li className="li-left mod-logo mod-2018">
-                        <a href="/" className="logo-a">
+                <a
+                    className="logo-a"
+                    href="/"
+                >
                     <img
-                                src="/images/logo_sm.png"
                         alt="Scratch Logo"
                         className="logo-a-image"
+                        src="/images/logo_sm.png"
                     />
                     <p className="logo-a-title">Conferences</p>
                 </a>
             </li>
         </ul>
     </NavigationBox>
-        );
-    }
-});
+);
 
 module.exports = Navigation;

src/components/navigation/www/navigation.jsx

@@ -1,31 +1,48 @@
-var classNames = require('classnames');
-var connect = require('react-redux').connect;
-var React = require('react');
-var ReactIntl = require('react-intl');
-var FormattedMessage = ReactIntl.FormattedMessage;
-var injectIntl = ReactIntl.injectIntl;
+const bindAll = require('lodash.bindall');
+const classNames = require('classnames');
+const connect = require('react-redux').connect;
+const FormattedMessage = require('react-intl').FormattedMessage;
+const injectIntl = require('react-intl').injectIntl;
+const intlShape = require('react-intl').intlShape;
+const PropTypes = require('prop-types');
+const React = require('react');
 
-var messageCountActions = require('../../../redux/message-count.js');
-var sessionActions = require('../../../redux/session.js');
+const messageCountActions = require('../../../redux/message-count.js');
+const sessionActions = require('../../../redux/session.js');
 
-var api = require('../../../lib/api');
-var Avatar = require('../../avatar/avatar.jsx');
-var Button = require('../../forms/button.jsx');
-var Dropdown = require('../../dropdown/dropdown.jsx');
-var Form = require('../../forms/form.jsx');
-var Input = require('../../forms/input.jsx');
-var log = require('../../../lib/log.js');
-var Login = require('../../login/login.jsx');
-var Modal = require('../../modal/base/modal.jsx');
-var NavigationBox = require('../base/navigation.jsx');
-var Registration = require('../../registration/registration.jsx');
+const api = require('../../../lib/api');
+const Avatar = require('../../avatar/avatar.jsx');
+const Button = require('../../forms/button.jsx');
+const Dropdown = require('../../dropdown/dropdown.jsx');
+const Form = require('../../forms/form.jsx');
+const Input = require('../../forms/input.jsx');
+const log = require('../../../lib/log.js');
+const Login = require('../../login/login.jsx');
+const Modal = require('../../modal/base/modal.jsx');
+const NavigationBox = require('../base/navigation.jsx');
+const Registration = require('../../registration/registration.jsx');
 
 require('./navigation.scss');
 
-var Navigation = React.createClass({
-    type: 'Navigation',
-    getInitialState: function () {
-        return {
+class Navigation extends React.Component {
+    constructor (props) {
+        super(props);
+        bindAll(this, [
+            'getProfileUrl',
+            'handleJoinClick',
+            'handleLoginClick',
+            'handleCloseLogin',
+            'handleLogIn',
+            'handleLogOut',
+            'handleAccountNavClick',
+            'handleCloseAccountNav',
+            'showCanceledDeletion',
+            'handleCloseCanceledDeletion',
+            'handleCloseRegistration',
+            'handleCompleteRegistration',
+            'handleSearchSubmit'
+        ]);
+        this.state = {
             accountNavOpen: false,
             canceledDeletionOpen: false,
             loginOpen: false,
@@ -33,155 +50,153 @@ var Navigation = React.createClass({
             registrationOpen: false,
             messageCountIntervalId: -1 // javascript method interval id for getting messsage count.
         };
-    },
-    getDefaultProps: function () {
-        return {
-            session: {},
-            unreadMessageCount: 0, // bubble number to display how many notifications someone has.
-            searchTerm: ''
-        };
-    },
-    componentDidMount: function () {
-        if (this.props.session.session.user) {
-            var intervalId = setInterval(function () {
-                this.props.dispatch(messageCountActions.getCount(this.props.session.session.user.username));
-            }.bind(this), 120000); // check for new messages every 2 mins.
-            this.setState({'messageCountIntervalId': intervalId});
     }
-    },
-    componentDidUpdate: function (prevProps) {
-        if (prevProps.session.session.user != this.props.session.session.user) {
-            this.setState({
-                'loginOpen': false,
-                'accountNavOpen': false
+    componentDidMount () {
+        if (this.props.session.session.user) {
+            const intervalId = setInterval(() => {
+                this.props.dispatch(
+                    messageCountActions.getCount(this.props.session.session.user.username)
+                );
+            }, 120000); // check for new messages every 2 mins.
+            this.setState({ // eslint-disable-line react/no-did-mount-set-state
+                messageCountIntervalId: intervalId
+            });
+        }
+    }
+    componentDidUpdate (prevProps) {
+        if (prevProps.session.session.user !== this.props.session.session.user) {
+            this.setState({ // eslint-disable-line react/no-did-update-set-state
+                loginOpen: false,
+                accountNavOpen: false
             });
             if (this.props.session.session.user) {
-                var intervalId = setInterval(function () {
-                    this.props.dispatch(messageCountActions.getCount(this.props.session.session.user.username));
-                }.bind(this), 120000); // check for new messages every 2 mins.
-                this.setState({'messageCountIntervalId': intervalId});
+                const intervalId = setInterval(() => {
+                    this.props.dispatch(
+                        messageCountActions.getCount(this.props.session.session.user.username)
+                    );
+                }, 120000); // check for new messages every 2 mins.
+                this.setState({ // eslint-disable-line react/no-did-update-set-state
+                    messageCountIntervalId: intervalId
+                });
             } else {
                 // clear message count check, and set to default id.
                 clearInterval(this.state.messageCountIntervalId);
                 this.props.dispatch(messageCountActions.setCount(0));
-                this.setState({
-                    'messageCountIntervalId': -1
+                this.setState({ // eslint-disable-line react/no-did-update-set-state
+                    messageCountIntervalId: -1
                 });
             }
         }
-    },
-    componentWillUnmount: function () {
+    }
+    componentWillUnmount () {
         // clear message interval if it exists
-        if (this.state.messageCountIntervalId != -1) {
+        if (this.state.messageCountIntervalId !== -1) {
             clearInterval(this.state.messageCountIntervalId);
             this.props.dispatch(messageCountActions.setCount(0));
             this.setState({
-                'messageCountIntervalId': -1
+                messageCountIntervalId: -1
             });
         }
-    },
-    getProfileUrl: function () {
+    }
+    getProfileUrl () {
         if (!this.props.session.session.user) return;
-        return '/users/' + this.props.session.session.user.username + '/';
-    },
-    handleJoinClick: function (e) {
+        return `/users/${this.props.session.session.user.username}/`;
+    }
+    handleJoinClick (e) {
         e.preventDefault();
-        this.setState({'registrationOpen': true});
-    },
-    handleLoginClick: function (e) {
+        this.setState({registrationOpen: true});
+    }
+    handleLoginClick (e) {
         e.preventDefault();
-        this.setState({'loginOpen': !this.state.loginOpen});
-    },
-    closeLogin: function () {
-        this.setState({'loginOpen': false});
-    },
-    handleLogIn: function (formData, callback) {
-        this.setState({'loginError': null});
-        formData['useMessages'] = true;
+        this.setState({loginOpen: !this.state.loginOpen});
+    }
+    handleCloseLogin () {
+        this.setState({loginOpen: false});
+    }
+    handleLogIn (formData, callback) {
+        this.setState({loginError: null});
+        formData.useMessages = true;
         api({
             method: 'post',
             host: '',
             uri: '/accounts/login/',
             json: formData,
             useCsrf: true
-        }, function (err, body) {
-            if (err) this.setState({'loginError': err.message});
+        }, (err, body) => {
+            if (err) this.setState({loginError: err.message});
             if (body) {
                 body = body[0];
-                if (!body.success) {
+                if (body.success) {
+                    this.handleCloseLogin();
+                    body.messages.map(message => { // eslint-disable-line array-callback-return
+                        if (message.message === 'canceled-deletion') {
+                            this.showCanceledDeletion();
+                        }
+                    });
+                    this.props.dispatch(sessionActions.refreshSession());
+                } else {
                     if (body.redirect) {
                         window.location = body.redirect;
                     }
                     // Update login error message to a friendlier one if it exists
-                    this.setState({'loginError': body.msg});
-                } else {
-                    this.closeLogin();
-                    body.messages.map(function (message) {
-                        if (message.message == 'canceled-deletion') {
-                            this.showCanceledDeletion();
-                        }
-                    }.bind(this));
-                    this.props.dispatch(sessionActions.refreshSession());
+                    this.setState({loginError: body.msg});
                 }
             }
             // JS error already logged by api mixin
             callback();
-        }.bind(this));
-    },
-    handleLogOut: function (e) {
+        });
+    }
+    handleLogOut (e) {
         e.preventDefault();
         api({
             host: '',
             method: 'post',
             uri: '/accounts/logout/',
             useCsrf: true
-        }, function (err) {
+        }, err => {
             if (err) log.error(err);
-            this.closeLogin();
+            this.handleCloseLogin();
             window.location = '/';
-        }.bind(this));
-    },
-    handleAccountNavClick: function (e) {
+        });
+    }
+    handleAccountNavClick (e) {
         e.preventDefault();
-        this.setState({'accountNavOpen': true});
-    },
-    closeAccountNav: function () {
-        this.setState({'accountNavOpen': false});
-    },
-    showCanceledDeletion: function () {
-        this.setState({'canceledDeletionOpen': true});
-    },
-    closeCanceledDeletion: function () {
-        this.setState({'canceledDeletionOpen': false});
-    },
-    closeRegistration: function () {
-        this.setState({'registrationOpen': false});
-    },
-    completeRegistration: function () {
+        this.setState({accountNavOpen: true});
+    }
+    handleCloseAccountNav () {
+        this.setState({accountNavOpen: false});
+    }
+    showCanceledDeletion () {
+        this.setState({canceledDeletionOpen: true});
+    }
+    handleCloseCanceledDeletion () {
+        this.setState({canceledDeletionOpen: false});
+    }
+    handleCloseRegistration () {
+        this.setState({registrationOpen: false});
+    }
+    handleCompleteRegistration () {
         this.props.dispatch(sessionActions.refreshSession());
-        this.closeRegistration();
-    },
-    onSearchSubmit: function (formData) {
-        window.location.href = '/search/projects?q=' + encodeURIComponent(formData.q);
-    },
-    render: function () {
-        var classes = classNames({
-            'logged-in': this.props.session.session.user
-        });
-        var messageClasses = classNames({
-            'message-count': true,
-            'show': this.props.unreadMessageCount > 0
-        });
-        var dropdownClasses = classNames({
-            'user-info': true,
-            'open': this.state.accountNavOpen
-        });
-        var formatMessage = this.props.intl.formatMessage;
-        var createLink = this.props.session.session.user ? '/projects/editor/' : '/projects/editor/?tip_bar=home';
+        this.handleCloseRegistration();
+    }
+    handleSearchSubmit (formData) {
+        window.location.href = `/search/projects?q=${encodeURIComponent(formData.q)}`;
+    }
+    render () {
+        const createLink = this.props.session.session.user ? '/projects/editor/' : '/projects/editor/?tip_bar=home';
         return (
-            <NavigationBox className={classes}>
+            <NavigationBox
+                className={classNames({
+                    'logged-in': this.props.session.session.user
+                })}
+            >
                 <ul>
-                    <li className="logo"><a href="/" aria-label="Scratch"></a></li>
+                    <li className="logo">
+                        <a
+                            aria-label="Scratch"
+                            href="/"
+                        />
+                    </li>
 
                     <li className="link create">
                         <a href={createLink}>
@@ -205,47 +220,76 @@ var Navigation = React.createClass({
                     </li>
 
                     <li className="search">
-                        <Form onSubmit={this.onSearchSubmit}>
-                            <Button type="submit" className="btn-search" />
-                            <Input type="text"
+                        <Form onSubmit={this.handleSearchSubmit}>
+                            <Button
+                                className="btn-search"
+                                type="submit"
+                            />
+                            <Input
+                                aria-label={this.props.intl.formatMessage({id: 'general.search'})}
+                                name="q"
+                                placeholder={this.props.intl.formatMessage({id: 'general.search'})}
+                                type="text"
                                 value={this.props.searchTerm}
-                                   aria-label={formatMessage({id: 'general.search'})}
-                                   placeholder={formatMessage({id: 'general.search'})}
-                                   name="q" />
+                            />
                         </Form>
                     </li>
                     {this.props.session.status === sessionActions.Status.FETCHED ? (
                         this.props.session.session.user ? [
-                            <li className="link right messages" key="messages">
+                            <li
+                                className="link right messages"
+                                key="messages"
+                            >
                                 <a
                                     href="/messages/"
-                                    title={formatMessage({id: 'general.messages'})}>
-
-                                    <span className={messageClasses}>{this.props.unreadMessageCount}</span>
+                                    title={this.props.intl.formatMessage({id: 'general.messages'})}
+                                >
+                                    <span
+                                        className={classNames({
+                                            'message-count': true,
+                                            'show': this.props.unreadMessageCount > 0
+                                        })}
+                                    >{this.props.unreadMessageCount}</span>
                                     <FormattedMessage id="general.messages" />
                                 </a>
                             </li>,
-                            <li className="link right mystuff" key="mystuff">
+                            <li
+                                className="link right mystuff"
+                                key="mystuff"
+                            >
                                 <a
                                     href="/mystuff/"
-                                    title={formatMessage({id: 'general.myStuff'})}>
-
+                                    title={this.props.intl.formatMessage({id: 'general.myStuff'})}
+                                >
                                     <FormattedMessage id="general.myStuff" />
                                 </a>
                             </li>,
-                            <li className="link right account-nav" key="account-nav">
-                                <a className={dropdownClasses}
-                                    href="#" onClick={this.handleAccountNavClick}>
-                                    <Avatar src={this.props.session.session.user.thumbnailUrl} alt="" />
-                                    <span className='profile-name'>
+                            <li
+                                className="link right account-nav"
+                                key="account-nav"
+                            >
+                                <a
+                                    className={classNames({
+                                        'user-info': true,
+                                        'open': this.state.accountNavOpen
+                                    })}
+                                    href="#"
+                                    onClick={this.handleAccountNavClick}
+                                >
+                                    <Avatar
+                                        alt=""
+                                        src={this.props.session.session.user.thumbnailUrl}
+                                    />
+                                    <span className="profile-name">
                                         {this.props.session.session.user.username}
                                     </span>
                                 </a>
                                 <Dropdown
                                     as="ul"
+                                    className={process.env.SCRATCH_ENV}
                                     isOpen={this.state.accountNavOpen}
-                                        onRequestClose={this.closeAccountNav}
-                                        className={process.env.SCRATCH_ENV}>
+                                    onRequestClose={this.handleCloseAccountNav}
+                                >
                                     <li>
                                         <a href={this.getProfileUrl()}>
                                             <FormattedMessage id="general.profile" />
@@ -264,8 +308,8 @@ var Navigation = React.createClass({
                                         </li>
                                     ] : []}
                                     {this.props.permissions.student ? [
-                                        <li>
-                                            <a href={'/classes/' + this.props.session.session.user.classroomId + '/'}>
+                                        <li key="my-class-li">
+                                            <a href={`/classes/${this.props.session.session.user.classroomId}/`}>
                                                 <FormattedMessage id="general.myClass" />
                                             </a>
                                         </li>
@@ -276,69 +320,123 @@ var Navigation = React.createClass({
                                         </a>
                                     </li>
                                     <li className="divider">
-                                        <a href="#" onClick={this.handleLogOut}>
+                                        <a
+                                            href="#"
+                                            onClick={this.handleLogOut}
+                                        >
                                             <FormattedMessage id="navigation.signOut" />
                                         </a>
                                     </li>
                                 </Dropdown>
                             </li>
                         ] : [
-                            <li className="link right join" key="join">
-                                <a href="#" onClick={this.handleJoinClick}>
+                            <li
+                                className="link right join"
+                                key="join"
+                            >
+                                <a
+                                    href="#"
+                                    onClick={this.handleJoinClick}
+                                >
                                     <FormattedMessage id="general.joinScratch" />
                                 </a>
                             </li>,
                             <Registration
-                                    key="registration"
                                 isOpen={this.state.registrationOpen}
-                                    onRequestClose={this.closeRegistration}
-                                    onRegistrationDone={this.completeRegistration} />,
-                            <li className="link right login-item" key="login">
+                                key="registration"
+                                onRegistrationDone={this.handleCompleteRegistration}
+                                onRequestClose={this.handleCloseRegistration}
+                            />,
+                            <li
+                                className="link right login-item"
+                                key="login"
+                            >
                                 <a
-                                    href="#"
-                                    onClick={this.handleLoginClick}
                                     className="ignore-react-onclickoutside"
-                                    key="login-link">
+                                    href="#"
+                                    key="login-link"
+                                    onClick={this.handleLoginClick}
+                                >
                                     <FormattedMessage id="general.signIn" />
                                 </a>
                                 <Dropdown
                                     className="login-dropdown with-arrow"
                                     isOpen={this.state.loginOpen}
-                                        onRequestClose={this.closeLogin}
-                                        key="login-dropdown">
+                                    key="login-dropdown"
+                                    onRequestClose={this.handleCloseLogin}
+                                >
                                     <Login
+                                        error={this.state.loginError}
                                         onLogIn={this.handleLogIn}
-                                        error={this.state.loginError} />
+                                    />
                                 </Dropdown>
                             </li>
-                        ]) : [
-                        ]}
+                        ]) : []}
                 </ul>
-                <Modal isOpen={this.state.canceledDeletionOpen}
-                       onRequestClose={this.closeCanceledDeletion}
-                       style={{content:{padding: 15}}}>
+                <Modal
+                    isOpen={this.state.canceledDeletionOpen}
+                    style={{
+                        content: {
+                            padding: 15
+                        }
+                    }}
+                    onRequestClose={this.handleCloseCanceledDeletion}
+                >
                     <h4>Your Account Will Not Be Deleted</h4>
+                    <h4><FormattedMessage id="general.noDeletionTitle" /></h4>
                     <p>
-                        Your account was scheduled for deletion but you logged in. Your account has been reactivated.
-                        If you didn’t request for your account to be deleted, you should
-                        {' '}<a href="/accounts/password_reset/">change your password</a>{' '}
-                        to make sure your account is secure.
+                        <FormattedMessage
+                            id="general.noDeletionDescription"
+                            values={{
+                                resetLink: <a href="/accounts/password_reset/">
+                                    {this.props.intl.formatMessage({id: 'general.noDeletionLink'})}
+                                </a>
+                            }}
+                        />
                     </p>
                 </Modal>
             </NavigationBox>
         );
     }
-});
+}
 
-var mapStateToProps = function (state) {
-    return {
+Navigation.propTypes = {
+    dispatch: PropTypes.func,
+    intl: intlShape,
+    permissions: PropTypes.shape({
+        admin: PropTypes.bool,
+        social: PropTypes.bool,
+        educator: PropTypes.bool,
+        educator_invitee: PropTypes.bool,
+        student: PropTypes.bool
+    }),
+    searchTerm: PropTypes.string,
+    session: PropTypes.shape({
+        session: PropTypes.shape({
+            user: PropTypes.shape({
+                classroomId: PropTypes.oneOfType([PropTypes.number, PropTypes.string]),
+                thumbnailUrl: PropTypes.string,
+                username: PropTypes.string
+            })
+        }),
+        status: PropTypes.string
+    }),
+    unreadMessageCount: PropTypes.oneOfType([PropTypes.number, PropTypes.string])
+};
+
+Navigation.defaultProps = {
+    session: {},
+    unreadMessageCount: 0, // bubble number to display how many notifications someone has.
+    searchTerm: ''
+};
+
+const mapStateToProps = state => ({
     session: state.session,
     permissions: state.permissions,
     unreadMessageCount: state.messageCount.messageCount,
     searchTerm: state.navigation
-    };
-};
+});
 
-var ConnectedNavigation = connect(mapStateToProps)(Navigation);
+const ConnectedNavigation = connect(mapStateToProps)(Navigation);
 
 module.exports = injectIntl(ConnectedNavigation);

src/components/nestedcarousel/nestedcarousel.jsx

@@ -1,35 +1,25 @@
-var classNames = require('classnames');
-var defaults = require('lodash.defaults');
-var React = require('react');
-var Slider = require('react-slick');
+const classNames = require('classnames');
+const defaults = require('lodash.defaults');
+const PropTypes = require('prop-types');
+const React = require('react');
+const Slider = require('react-slick');
 
-var Thumbnail = require('../thumbnail/thumbnail.jsx');
+const Thumbnail = require('../thumbnail/thumbnail.jsx');
 
 require('slick-carousel/slick/slick.scss');
 require('slick-carousel/slick/slick-theme.scss');
 require('./nestedcarousel.scss');
 
 
-{/*
+/*
     NestedCarousel is used to show a carousel, where each slide is composed of a few
     thumbnails (for example, to show step-by-syep tips, where each stage has a few steps).
     It creates the thumbnails without links.
 
     Each slide has a title, and then a list of thumbnails, that will be shown together.
-*/}
-var NestedCarousel = React.createClass({
-    type: 'NestedCarousel',
-    propTypes: {
-        items: React.PropTypes.array
-    },
-    getDefaultProps: function () {
-        return {
-            items: require('./nestedcarousel.json')
-        };
-    },
-    render: function () {
-        var settings = this.props.settings || {};
-        defaults(settings, {
+*/
+const NestedCarousel = props => {
+    defaults(props.settings, {
         dots: true,
         infinite: false,
         lazyLoad: true,
@@ -38,38 +28,57 @@ var NestedCarousel = React.createClass({
         variableWidth: false
     });
         
-        var arrows = this.props.items.length > settings.slidesToShow;
+    const arrows = props.items.length > props.settings.slidesToShow;
+    const stages = [];
 
-        var classes = classNames(
-            'nestedcarousel',
-            'carousel',
-            this.props.className
-        );
-        
-        var stages = [];
-        for (var i=0; i < this.props.items.length; i++) {
-            var items = this.props.items[i].thumbnails;
-            var thumbnails = [];
-            for (var j=0; j < items.length; j++) {
-                var item = items[j];
+    for (let i = 0; i < props.items.length; i++) {
+        const items = props.items[i].thumbnails;
+        const thumbnails = [];
+        for (let j = 0; j < items.length; j++) {
+            const item = items[j];
             thumbnails.push(
-                    <Thumbnail key={'inner_' + i + '_' + j}
-                               title={item.title}
+                <Thumbnail
+                    key={`inner_${i}_${j}`}
+                    linkTitle={false}
                     src={item.thumbnailUrl}
-                               linkTitle = {false} />);
+                    title={item.title}
+                />
+            );
         }
         stages.push(
-            <div key={'outer_' + i}>
-                <h3>{this.props.items[i].title}</h3>
+            <div key={`outer_${i}`}>
+                <h3>{props.items[i].title}</h3>
                 {thumbnails}
-            </div>);
+            </div>
+        );
     }
     return (
-            <Slider className={classes} arrows={arrows} {... settings}>
+        <Slider
+            arrows={arrows}
+            className={classNames('nestedcarousel', 'carousel', props.className)}
+            {...props.settings}
+        >
             {stages}
         </Slider>
     );
-    }
-});
+};
+
+NestedCarousel.propTypes = {
+    className: PropTypes.string,
+    items: PropTypes.arrayOf(PropTypes.object),
+    settings: PropTypes.shape({
+        dots: PropTypes.bool,
+        infinite: PropTypes.bool,
+        lazyLoad: PropTypes.bool,
+        slidesToShow: PropTypes.number,
+        slidesToScroll: PropTypes.number,
+        variableWidth: PropTypes.bool
+    })
+};
+
+NestedCarousel.defaultProps = {
+    settings: {},
+    items: require('./nestedcarousel.json')
+};
 
 module.exports = NestedCarousel;

src/components/news/news.jsx

@@ -1,41 +1,27 @@
-var React = require('react');
+const PropTypes = require('prop-types');
+const React = require('react');
 
-var Box = require('../box/box.jsx');
+const Box = require('../box/box.jsx');
 
 require('./news.scss');
 
-var News = React.createClass({
-    type: 'News',
-    propTypes: {
-        items: React.PropTypes.array
-    },
-    getDefaultProps: function () {
-        return {
-            items: require('./news.json'),
-            messages: {
-                'general.viewAll': 'View All',
-                'news.scratchNews': 'Scratch News'
-            }
-        };
-    },
-    render: function () {
-        return (
+const News = props => (
     <Box
         className="news"
-                title={this.props.messages['news.scratchNews']}
-                moreTitle={this.props.messages['general.viewAll']}
-                moreHref="/discuss/5/">
-
+        moreHref="/discuss/5/"
+        moreTitle={props.messages['general.viewAll']}
+        title={props.messages['news.scratchNews']}
+    >
         <ul>
-                    {this.props.items.map(function (item) {
-                        return (
+            {props.items.map(item => (
                 <li key={item.id}>
                     <a href={item.url}>
-                                    <img src={item.image}
-                                         className="news-image"
-                                         width="53"
-                                         height="53"
+                        <img
                             alt=""
+                            className="news-image"
+                            height="53"
+                            src={item.image}
+                            width="53"
                         />
                         <div className="news-description">
                             <h4>{item.headline}</h4>
@@ -43,12 +29,25 @@ var News = React.createClass({
                         </div>
                     </a>
                 </li>
-                        );
-                    })}
+            ))}
         </ul>
     </Box>
-        );
+);
+
+News.propTypes = {
+    items: PropTypes.arrayOf(PropTypes.object),
+    messages: PropTypes.shape({
+        'general.viewAll': PropTypes.string,
+        'news.scratchNews': PropTypes.string
+    })
+};
+
+News.defaultProps = {
+    items: require('./news.json'),
+    messages: {
+        'general.viewAll': 'View All',
+        'news.scratchNews': 'Scratch News'
     }
-});
+};
 
 module.exports = News;

src/components/page/conference/2016/page.jsx

@@ -1,27 +1,27 @@
-var React = require('react');
+const PropTypes = require('prop-types');
+const React = require('react');
 
-var Navigation = require('../../../navigation/conference/2016/navigation.jsx');
-var Footer = require('../../../footer/conference/2016/footer.jsx');
+const Navigation = require('../../../navigation/conference/2016/navigation.jsx');
+const Footer = require('../../../footer/conference/2016/footer.jsx');
 
 require('../page.scss');
 
-var Page = React.createClass({
-    type: 'Page',
-    render: function () {
-        return (
+const Page = props => (
     <div className="page mod-conference">
         <div id="navigation">
             <Navigation />
         </div>
         <div id="view">
-                    {this.props.children}
+            {props.children}
         </div>
         <div id="footer">
             <Footer />
         </div>
     </div>
-        );
-    }
-});
+);
+
+Page.propTypes = {
+    children: PropTypes.node
+};
 
 module.exports = Page;

src/components/page/conference/2017/page.jsx

@@ -1,27 +1,27 @@
-var React = require('react');
+const PropTypes = require('prop-types');
+const React = require('react');
 
-var Navigation = require('../../../navigation/conference/2017/navigation.jsx');
-var Footer = require('../../../footer/conference/2017/footer.jsx');
+const Navigation = require('../../../navigation/conference/2017/navigation.jsx');
+const Footer = require('../../../footer/conference/2017/footer.jsx');
 
 require('../page.scss');
 
-var Page = React.createClass({
-    type: 'Page',
-    render: function () {
-        return (
+const Page = props => (
     <div className="page mod-conference">
         <div id="navigation">
             <Navigation />
         </div>
         <div id="view">
-                    {this.props.children}
+            {props.children}
         </div>
         <div id="footer">
             <Footer />
         </div>
     </div>
-        );
-    }
-});
+);
+
+Page.propTypes = {
+    children: PropTypes.node
+};
 
 module.exports = Page;

src/components/page/conference/2018/page.jsx

@@ -1,27 +1,27 @@
-var React = require('react');
+const PropTypes = require('prop-types');
+const React = require('react');
 
-var Navigation = require('../../../navigation/conference/2018/navigation.jsx');
-var Footer = require('../../../footer/conference/2018/footer.jsx');
+const Navigation = require('../../../navigation/conference/2018/navigation.jsx');
+const Footer = require('../../../footer/conference/2018/footer.jsx');
 
 require('../page.scss');
 
-var Page = React.createClass({
-    type: 'Page',
-    render: function () {
-        return (
+const Page = props => (
     <div className="page mod-conference">
         <div id="navigation">
             <Navigation />
         </div>
         <div id="view">
-                    {this.props.children}
+            {props.children}
         </div>
         <div id="footer">
             <Footer />
         </div>
     </div>
-        );
-    }
-});
+);
+
+Page.propTypes = {
+    children: PropTypes.node
+};
 
 module.exports = Page;

src/components/page/www/page.jsx

@@ -1,29 +1,31 @@
-var React = require('react');
-var classNames = require('classnames');
+const classNames = require('classnames');
+const PropTypes = require('prop-types');
+const React = require('react');
 
-var Navigation = require('../../navigation/www/navigation.jsx');
-var Footer = require('../../footer/www/footer.jsx');
+const Navigation = require('../../navigation/www/navigation.jsx');
+const Footer = require('../../footer/www/footer.jsx');
 
-var Page = React.createClass({
-    type: 'Page',
-    render: function () {
-        var classes = classNames({
-            'staging': process.env.SCRATCH_ENV == 'staging'
-        });
-        return (
+const Page = props => (
     <div className="page">
-                <div id="navigation" className={classes}>
+        <div
+            className={classNames({
+                staging: process.env.SCRATCH_ENV === 'staging'
+            })}
+            id="navigation"
+        >
             <Navigation />
         </div>
         <div id="view">
-                    {this.props.children}
+            {props.children}
         </div>
         <div id="footer">
             <Footer />
         </div>
     </div>
-        );
-    }
-});
+);
+
+Page.propTypes = {
+    children: PropTypes.node
+};
 
 module.exports = Page;

src/components/progression/progression.jsx

@@ -1,42 +1,45 @@
-var classNames = require('classnames');
-var React = require('react');
+const classNames = require('classnames');
+const PropTypes = require('prop-types');
+const React = require('react');
 
-module.exports = React.createClass({
-    displayName: 'Progression',
-    propTypes: {
-        step: function (props, propName, componentName) {
-            var stepValidator = function (props, propName) {
-                if (props[propName] > -1 && props[propName] < props.children.length) {
-                    return null;
-                } else {
-                    return new Error('Prop `step` out of range');
-                }
+const Progression = props => {
+    const childProps = {
+        activeStep: props.step,
+        totalSteps: React.Children.count(props.children)
     };
     return (
-                React.PropTypes.number.isRequired(props, propName, componentName) ||
+        <div
+            className={classNames('progression', props.className)}
+            {...props}
+        >
+            {React.Children.map(props.children, (child, id) => {
+                if (id === props.step) {
+                    return React.cloneElement(child, childProps);
+                }
+            })}
+        </div>
+    );
+};
+
+Progression.propTypes = {
+    children: PropTypes.node,
+    className: PropTypes.string,
+    step: function (props, propName, componentName) {
+        const stepValidator = (propz, name) => {
+            if (propz[name] > -1 && propz[name] < propz.children.length) {
+                return null;
+            }
+            return new Error('Prop `step` out of range');
+        };
+        return (
+            (typeof props[propName] === 'number' ? null : new Error('Not a number')) ||
             stepValidator(props, propName, componentName)
         );
     }
-    },
-    getDefaultProps: function () {
-        return {
+};
+
+Progression.defaultProps = {
     step: 0
-        };
-    },
-    render: function () {
-        var childProps = {
-            activeStep: this.props.step,
-            totalSteps: React.Children.count(this.props.children)
-        };
-        return (
-            <div {... this.props}
-                 className={classNames('progression', this.props.className)}>
-                {React.Children.map(this.props.children, function (child, id) {
-                    if (id === this.props.step) {
-                        return React.cloneElement(child, childProps);
-                    }
-                }, this)}
-            </div>
-        );
-    }
-});
+};
+
+module.exports = Progression;

src/components/registration/registration.jsx

@@ -1,53 +1,62 @@
-var React = require('react');
-var IframeModal = require('../modal/iframe/modal.jsx');
+const bindAll = require('lodash.bindall');
+const PropTypes = require('prop-types');
+const React = require('react');
+
+const IframeModal = require('../modal/iframe/modal.jsx');
 
 require('./registration.scss');
 
-var Registration = React.createClass({
-    propTypes: {
-        isOpen: React.PropTypes.bool,
-        onRegistrationDone: React.PropTypes.func,
-        onRequestClose: React.PropTypes.func
-    },
-    onMessage: function (e) {
-        if (e.origin != window.location.origin) return;
-        if (e.source != this.registrationIframe.contentWindow) return;
-        if (e.data == 'registration-done') this.props.onRegistrationDone();
-        if (e.data == 'registration-relaunch') {
+class Registration extends React.Component {
+    constructor (props) {
+        super(props);
+        bindAll(this, [
+            'handleMessage',
+            'toggleMessageListener'
+        ]);
+    }
+    componentDidMount () {
+        if (this.props.isOpen) this.toggleMessageListener(true);
+    }
+    componentDidUpdate (prevProps) {
+        this.toggleMessageListener(this.props.isOpen && !prevProps.isOpen);
+    }
+    componentWillUnmount () {
+        this.toggleMessageListener(false);
+    }
+    handleMessage (e) {
+        if (e.origin !== window.location.origin) return;
+        if (e.source !== this.registrationIframe.contentWindow) return;
+        if (e.data === 'registration-done') this.props.onRegistrationDone();
+        if (e.data === 'registration-relaunch') {
             this.registrationIframe.contentWindow.location.reload();
         }
-    },
-    toggleMessageListener: function (present) {
-        if (present) {
-            window.addEventListener('message', this.onMessage);
-        } else {
-            window.removeEventListener('message', this.onMessage);
     }
-    },
-    componentDidMount: function () {
-        if (this.props.isOpen) this.toggleMessageListener(true);
-    },
-    componentDidUpdate: function (prevProps) {
-        this.toggleMessageListener(this.props.isOpen && !prevProps.isOpen);
-    },
-    componentWillUnmount: function () {
-        this.toggleMessageListener(false);
-    },
-    render: function () {
+    toggleMessageListener (present) {
+        if (present) {
+            window.addEventListener('message', this.handleMessage);
+        } else {
+            window.removeEventListener('message', this.handleMessage);
+        }
+    }
+    render () {
         return (
             <IframeModal
-                isOpen={this.props.isOpen}
-                onRequestClose={this.props.onRequestClose}
                 className="mod-registration"
-                componentRef={
-                    function (iframe) {
+                componentRef={iframe => { // eslint-disable-line react/jsx-no-bind
                     this.registrationIframe = iframe;
-                    }.bind(this)
-                }
+                }}
+                isOpen={this.props.isOpen}
                 src="/accounts/standalone-registration/"
+                onRequestClose={this.props.onRequestClose}
             />
         );
     }
-});
+}
+
+Registration.propTypes = {
+    isOpen: PropTypes.bool,
+    onRegistrationDone: PropTypes.func,
+    onRequestClose: PropTypes.func
+};
 
 module.exports = Registration;

src/components/slide/slide.jsx

@@ -1,17 +1,18 @@
-var classNames = require('classnames');
-var React = require('react');
+const classNames = require('classnames');
+const PropTypes = require('prop-types');
+const React = require('react');
 
 require('./slide.scss');
 
-var Slide = React.createClass({
-    displayName: 'Slide',
-    render: function () {
-        return (
-            <div className={classNames(['slide', this.props.className])}>
-                {this.props.children}
+const Slide = props => (
+    <div className={classNames(['slide', props.className])}>
+        {props.children}
     </div>
-        );
-    }
-});
+);
+
+Slide.propTypes = {
+    children: PropTypes.node,
+    className: PropTypes.string
+};
 
 module.exports = Slide;

src/components/social-message/social-message.jsx

@@ -1,57 +1,47 @@
-var classNames = require('classnames');
-var FormattedRelative = require('react-intl').FormattedRelative;
-var React = require('react');
+const classNames = require('classnames');
+const FormattedRelative = require('react-intl').FormattedRelative;
+const PropTypes = require('prop-types');
+const React = require('react');
 
-var FlexRow = require('../flex-row/flex-row.jsx');
+const FlexRow = require('../flex-row/flex-row.jsx');
 
 require('./social-message.scss');
 
-var SocialMessage = React.createClass({
-    type: 'SocialMessage',
-    propTypes: {
-        as: React.PropTypes.string,
-        datetime: React.PropTypes.string.isRequired,
-        iconSrc: React.PropTypes.string,
-        iconAlt: React.PropTypes.string,
-        imgClassName: React.PropTypes.string
-    },
-    getDefaultProps: function () {
-        return {
-            as: 'li'
-        };
-    },
-    render: function () {
-        var classes = classNames(
-            'social-message',
-            this.props.className
-        );
-        var imgClass = classNames(
-            'social-message-icon',
-            this.props.imgClassName
-        );
-        return (
-            <this.props.as className={classes}>
+const SocialMessage = props => (
+    <props.as className={classNames('social-message', props.className)}>
         <FlexRow className="mod-social-message">
             <div className="social-message-content">
-                        {typeof this.props.iconSrc !== 'undefined' ? [
+                {typeof props.iconSrc === 'undefined' ? [] : [
                     <img
+                        alt={props.iconAlt}
+                        className={classNames('social-message-icon', props.imgClassName)}
                         key="social-message-icon"
-                                className={imgClass}
-                                src={this.props.iconSrc}
-                                alt={this.props.iconAlt}
+                        src={props.iconSrc}
                     />
-                        ] : []}
+                ]}
                 <div>
-                            {this.props.children}
+                    {props.children}
                 </div>
             </div>
             <span className="social-message-date">
-                        <FormattedRelative value={new Date(this.props.datetime)} />
+                <FormattedRelative value={new Date(props.datetime)} />
             </span>
         </FlexRow>
-            </this.props.as>
-        );
-    }
-});
+    </props.as>
+);
+
+SocialMessage.propTypes = {
+    as: PropTypes.string, // eslint-disable-line react/no-unused-prop-types
+    children: PropTypes.node,
+    className: PropTypes.string,
+    datetime: PropTypes.string.isRequired,
+    iconAlt: PropTypes.string,
+    iconSrc: PropTypes.string,
+    imgClassName: PropTypes.string
+};
+
+SocialMessage.defaultProps = {
+    as: 'li'
+};
 
 module.exports = SocialMessage;

src/components/spinner/spinner.jsx

@@ -1,20 +1,18 @@
-var range = require('lodash.range');
-var React = require('react');
+const range = require('lodash.range');
+const React = require('react');
 
 require('./spinner.scss');
 
-var Spinner = React.createClass({
-    // Adapted from http://tobiasahlin.com/spinkit/
-    type: 'Spinner',
-    render: function () {
-        return (
+// Adapted from http://tobiasahlin.com/spinkit/
+const Spinner = () => (
     <div className="spinner">
-                {range(1,13).map(function (id) {
-                    return <div className={'circle' + id + ' circle'}></div>;
-                })}
+        {range(1, 13).map(id => (
+            <div
+                className={`circle${id} circle`}
+                key={`circle${id}`}
+            />
+        ))}
     </div>
-        );
-    }
-});
+);
 
 module.exports = Spinner;

src/components/stepnavigation/stepnavigation.jsx

@@ -1,28 +1,29 @@
-var classNames = require('classnames');
-var React = require('react');
+const classNames = require('classnames');
+const PropTypes = require('prop-types');
+const React = require('react');
 
 require('./stepnavigation.scss');
 
-var StepNavigation = React.createClass({
-    type: 'Navigation',
-    render: function () {
-        return (
-            <ul className={classNames('step-navigation', this.props.className)}>
-                {Array.apply(null, Array(this.props.steps)).map(function (v, step) {
-                    return (
-                        <li key={step}
+const StepNavigation = props => (
+    <ul className={classNames('step-navigation', props.className)}>
+        {Array.apply(null, Array(props.steps)).map((v, step) => (
+            <li
                 className={classNames({
-                                active: step < this.props.active,
-                                selected: step === this.props.active
+                    active: step < props.active,
+                    selected: step === props.active
                 })}
+                key={step}
             >
                 <div className="indicator" />
             </li>
-                    );
-                }.bind(this))}
+        ))}
     </ul>
-        );
-    }
-});
+);
+
+StepNavigation.propTypes = {
+    active: PropTypes.number,
+    className: PropTypes.string,
+    steps: PropTypes.number
+};
 
 module.exports = StepNavigation;

src/components/subnavigation/subnavigation.jsx

@@ -1,36 +1,38 @@
-var classNames = require('classnames');
-var React = require('react');
+const classNames = require('classnames');
+const PropTypes = require('prop-types');
+const React = require('react');
 
 require('./subnavigation.scss');
 
-/**
+/*
  * Container for a custom, horizontal list of navigation elements
  * that can be displayed within a view or component.
  */
-var SubNavigation = React.createClass({
-    type: 'SubNavigation',
-    getDefaultProps: function () {
-        return {
-            align: 'middle'
-        };
-    },
-    render: function () {
-        var classes = classNames(
+const SubNavigation = props => (
+    <div
+        className={classNames(
             [
                 'sub-nav',
-                this.props.className
+                props.className
             ],
             {
-                'sub-nav-align-left': this.props.align === 'left',
-                'sub-nav-align-right': this.props.align === 'right'
+                'sub-nav-align-left': props.align === 'left',
+                'sub-nav-align-right': props.align === 'right'
             }
-        );
-        return (
-            <div className={classes}>
-                {this.props.children}
+        )}
+    >
+        {props.children}
     </div>
-        );
-    }
-});
+);
+
+SubNavigation.propTypes = {
+    align: PropTypes.string,
+    children: PropTypes.node,
+    className: PropTypes.string
+};
+
+SubNavigation.defaultProps = {
+    align: 'middle'
+};
 
 module.exports = SubNavigation;

src/components/tabs/tabs.jsx

@@ -1,28 +1,26 @@
-var classNames = require('classnames');
-var SubNavigation = require('../../components/subnavigation/subnavigation.jsx');
-var React = require('react');
+const classNames = require('classnames');
+const PropTypes = require('prop-types');
+const React = require('react');
+
+const SubNavigation = require('../../components/subnavigation/subnavigation.jsx');
 
 require('./tabs.scss');
 
-/**
+/*
  * Container for a custom, horizontal list of navigation elements
  * that can be displayed within a view or component.
  */
-var Tabs = React.createClass({
-    type: 'Tabs',
-    render: function () {
-        var classes = classNames(
-            'tabs',
-            this.props.className
-        );
-        return (
-            <div className='tab-background'>
-                <SubNavigation className={classes}>
-                    {this.props.children}
+const Tabs = props => (
+    <div className="tab-background">
+        <SubNavigation className={classNames('tabs', props.className)}>
+            {props.children}
         </SubNavigation>
     </div>
-        );
-    }
-});
+);
+
+Tabs.propTypes = {
+    children: PropTypes.node,
+    className: PropTypes.string
+};
 
 module.exports = Tabs;

src/components/teacher-banner/teacher-banner.jsx

@@ -1,19 +1,85 @@
-var classNames = require('classnames');
-var connect = require('react-redux').connect;
-var React = require('react');
+const classNames = require('classnames');
+const connect = require('react-redux').connect;
+const PropTypes = require('prop-types');
+const React = require('react');
 
-var sessionActions = require('../../redux/session.js');
+const sessionActions = require('../../redux/session.js');
 
-var TitleBanner = require('../title-banner/title-banner.jsx');
-var Button = require('../forms/button.jsx');
-var FlexRow = require('../flex-row/flex-row.jsx');
+const TitleBanner = require('../title-banner/title-banner.jsx');
+const Button = require('../forms/button.jsx');
+const FlexRow = require('../flex-row/flex-row.jsx');
 
 require('./teacher-banner.scss');
 
-var TeacherBanner = React.createClass({
-    type: 'TeacherBanner',
-    getDefaultProps: function () {
-        return {
+const TeacherBanner = props => (
+    <TitleBanner className={classNames('teacher-banner', props.className)}>
+        <FlexRow className="inner">
+            <div className="welcome">
+                {props.sessionStatus === sessionActions.Status.FETCHED ? (
+                    props.user ? [
+                        <h3 key="greeting">
+                            {props.messages['teacherbanner.greeting']},{' '}
+                            {props.user.username}
+                        </h3>,
+                        <p
+                            className="title-banner-p"
+                            key="subgreeting"
+                        >
+                            {props.messages['teacherbanner.subgreeting']}
+                        </p>
+                    ] : []
+                ) : []}
+            </div>
+            <FlexRow className="quick-links">
+                {props.sessionStatus === sessionActions.Status.FETCHED ? (
+                    props.user ? [
+                        <a
+                            href="/educators/classes"
+                            key="classes-button"
+                        >
+                            <Button>
+                                {props.messages['teacherbanner.classesButton']}
+                            </Button>
+                        </a>,
+                        <a
+                            href="/info/educators"
+                            key="resources-button"
+                        >
+                            <Button>
+                                {props.messages['teacherbanner.resourcesButton']}
+                            </Button>
+                        </a>,
+                        <a
+                            href="/educators/faq"
+                            key="faq-button"
+                        >
+                            <Button>
+                                {props.messages['teacherbanner.faqButton']}
+                            </Button>
+                        </a>
+                    ] : []
+                ) : []}
+            </FlexRow>
+        </FlexRow>
+    </TitleBanner>
+);
+
+TeacherBanner.propTypes = {
+    className: PropTypes.string,
+    messages: PropTypes.shape({
+        'teacherbanner.greeting': PropTypes.string,
+        'teacherbanner.subgreeting': PropTypes.string,
+        'teacherbanner.classesButton': PropTypes.string,
+        'teacherbanner.resourcesButton': PropTypes.string,
+        'teacherbanner.faqButton': PropTypes.string
+    }),
+    sessionStatus: PropTypes.string,
+    user: PropTypes.shape({
+        username: PropTypes.string
+    })
+};
+
+TeacherBanner.defaultProps = {
     messages: {
         'teacherbanner.greeting': 'Hi',
         'teacherbanner.subgreeting': 'Teacher Account',
@@ -21,66 +87,14 @@ var TeacherBanner = React.createClass({
         'teacherbanner.resourcesButton': 'Educator Resources',
         'teacherbanner.faqButton': 'Teacher Account FAQ'
     },
-            session: {}
-        };
-    },
-    render: function () {
-        var classes = classNames(
-            'teacher-banner',
-            this.props.className
-        );
-        return (
-            <TitleBanner className={classes}>
-                <FlexRow className="inner">
-                    <div className="welcome">
-                        {this.props.session.status === sessionActions.Status.FETCHED ? (
-                            this.props.session.session.user ? [
-                                <h3 key="greeting">
-                                    {this.props.messages['teacherbanner.greeting']},{' '}
-                                    {this.props.session.session.user.username}
-                                </h3>,
-                                <p
-                                    key="subgreeting"
-                                    className="title-banner-p"
-                                >
-                                    {this.props.messages['teacherbanner.subgreeting']}
-                                </p>
-                            ] : []
-                        ): []}
-                    </div>
-                    <FlexRow className="quick-links">
-                        {this.props.session.status === sessionActions.Status.FETCHED ? (
-                            this.props.session.session.user ? [
-                                <a href="/educators/classes" key="classes-button">
-                                    <Button>
-                                        {this.props.messages['teacherbanner.classesButton']}
-                                    </Button>
-                                </a>,
-                                <a href="/info/educators" key="resources-button">
-                                    <Button>
-                                        {this.props.messages['teacherbanner.resourcesButton']}
-                                    </Button>
-                                </a>,
-                                <a href="/educators/faq" key="faq-button">
-                                    <Button>
-                                        {this.props.messages['teacherbanner.faqButton']}
-                                    </Button>
-                                </a>
-                            ] : []
-                        ): []}
-                    </FlexRow>
-                </FlexRow>
-            </TitleBanner>
-        );
-    }
-});
-
-var mapStateToProps = function (state) {
-    return {
-        session: state.session
-    };
+    user: {}
 };
 
-var ConnectedTeacherBanner = connect(mapStateToProps)(TeacherBanner);
+const mapStateToProps = state => ({
+    sessionStatus: state.session.status,
+    user: state.session.session.user
+});
+
+const ConnectedTeacherBanner = connect(mapStateToProps)(TeacherBanner);
 
 module.exports = ConnectedTeacherBanner;

src/components/thumbnail/thumbnail.jsx

@@ -1,175 +1,122 @@
-var classNames = require('classnames');
-var React = require('react');
+const classNames = require('classnames');
+const PropTypes = require('prop-types');
+const React = require('react');
 
 require('./thumbnail.scss');
 
-var Thumbnail = React.createClass({
-    type: 'Thumbnail',
-    propTypes: {
-        src: React.PropTypes.string
-    },
-    getInitialState: function () {
-        return {
-            srcFallback: false,
-            avatarFallback: false
-        };
-    },
-    getDefaultProps: function () {
-        return {
-            href: '#',
-            title: 'Project',
-            src: '',
-            srcDefault: 'https://uploads.scratch.mit.edu/projects/thumbnails/default.png',
-            avatar: '',
-            avatarDefault: 'https://uploads.scratch.mit.edu/users/avatars/default.png',
-            type: 'project',
-            showLoves: false,
-            showFavorites: false,
-            showRemixes: false,
-            showViews: false,
-            showAvatar: false,
-            linkTitle: true,
-            alt: ''
-        };
-    },
-    handleSrcError: function () {
-        this.setState({srcFallback: true});
-    },
-    handleAvatarError: function () {
-        this.setState({avatarFallback: true});
-    },
-    render: function () {
-        var classes = classNames(
-            'thumbnail',
-            this.props.type,
-            this.props.className
-        );
-        var extra = [];
-        var info = [];
+const Thumbnail = props => {
+    const extra = [];
+    const info = [];
 
-        if (this.props.loves && this.props.showLoves) {
+    if (props.loves && props.showLoves) {
         extra.push(
             <div
-                    key="loves"
                 className="thumbnail-loves"
-                    title={this.props.loves + ' loves'}>
-                    {this.props.loves}
+                key="loves"
+                title={`${props.loves} loves`}
+            >
+                {props.loves}
             </div>
         );
     }
-        if (this.props.favorites && this.props.showFavorites) {
+    if (props.favorites && props.showFavorites) {
         extra.push(
             <div
-                    key="favorites"
                 className="thumbnail-favorites"
-                    title={this.favorites + ' favorites'}>
-                    {this.props.favorites}
+                key="favorites"
+                title={`${props.favorites} favorites`}
+            >
+                {props.favorites}
             </div>
         );
     }
-        if (this.props.remixes && this.props.showRemixes) {
+    if (props.remixes && props.showRemixes) {
         extra.push(
             <div
-                    key="remixes"
                 className="thumbnail-remixes"
-                    title={this.props.remixes + ' remixes'}
+                key="remixes"
+                title={`${props.remixes} remixes`}
             >
-                    {this.props.remixes}
+                {props.remixes}
             </div>
         );
     }
-        if (this.props.views && this.props.showViews) {
+    if (props.views && props.showViews) {
         extra.push(
             <div
-                    key="views"
                 className="thumbnail-views"
-                    title={this.props.views + ' views'}
+                key="views"
+                title={`${props.views} views`}
             >
-                    {this.props.views}
+                {props.views}
             </div>
         );
     }
 
-        var imgElement, titleElement, avatarElement;
-        if (this.props.linkTitle) {
-            if (this.state.srcFallback) {
+    let imgElement;
+    let titleElement;
+    let avatarElement;
+
+    if (props.linkTitle) {
         imgElement = (
             <a
                 className="thumbnail-image"
-                        href={this.props.href}
+                href={props.href}
                 key="imgElement"
             >
                 <img
-                            alt={this.props.alt}
-                            src={this.props.srcDefault}
+                    alt={props.alt}
+                    src={props.src}
                 />
             </a>
         );
-            } else {
-                imgElement = (
-                    <a
-                        className="thumbnail-image"
-                        href={this.props.href}
-                        key="imgElement"
-                    >
-                        <img
-                            alt={this.props.alt}
-                            src={this.props.src}
-                            onError={this.handleSrcError}
-                        />
-                    </a>
-                );
-            }
         titleElement = (
-                <a href={this.props.href} key="titleElement">
-                    {this.props.title}
+            <a
+                href={props.href}
+                key="titleElement"
+            >
+                {props.title}
             </a>
         );
     } else {
-            imgElement = <img src={this.props.src} />;
-            titleElement = this.props.title;
+        imgElement = <img src={props.src} />;
+        titleElement = props.title;
     }
 
     info.push(titleElement);
 
-        if (this.props.creator) {
+    if (props.creator) {
         info.push(
-                <div key="creator" className="thumbnail-creator">
-                    <a href={'/users/' + this.props.creator + '/'}>{this.props.creator}</a>
+            <div
+                className="thumbnail-creator"
+                key="creator"
+            >
+                <a href={`/users/${props.creator}/`}>{props.creator}</a>
             </div>
         );
     }
 
-        if (this.props.avatar && this.props.showAvatar) {
-            if (this.state.avatarFallback) {
+    if (props.avatar && props.showAvatar) {
         avatarElement = (
             <a
                 className="creator-image"
-                        href={'/users/' + this.props.creator + '/'}
+                href={`/users/${props.creator}/`}
             >
                 <img
-                            alt={this.props.creator}
-                            src={this.props.avatarDefault}
+                    alt={props.creator}
+                    src={props.avatar}
                 />
             </a>
         );
-            } else {
-                avatarElement = (
-                    <a
-                        className="creator-image"
-                        href={'/users/' + this.props.creator + '/'}
-                    >
-                        <img
-                            alt={this.props.creator}
-                            src={this.props.avatar}
-                            onError={this.handleAvatarError}
-                        />
-                    </a>
-                );
-            }
     }
     return (
-            <div className={classes} >
+        <div
+            className={classNames(
+                'thumbnail',
+                props.type,
+                props.className
+            )}
+        >
             {imgElement}
             <div className="thumbnail-info">
                 {avatarElement}
@@ -180,7 +127,42 @@ var Thumbnail = React.createClass({
             {extra}
         </div>
     );
-    }
-});
+};
+
+Thumbnail.propTypes = {
+    alt: PropTypes.string,
+    avatar: PropTypes.string,
+    className: PropTypes.string,
+    creator: PropTypes.string,
+    favorites: PropTypes.oneOfType([PropTypes.number, PropTypes.string]),
+    href: PropTypes.string,
+    linkTitle: PropTypes.bool,
+    loves: PropTypes.oneOfType([PropTypes.number, PropTypes.string]),
+    remixes: PropTypes.oneOfType([PropTypes.number, PropTypes.string]),
+    showAvatar: PropTypes.bool,
+    showFavorites: PropTypes.bool,
+    showLoves: PropTypes.bool,
+    showRemixes: PropTypes.bool,
+    showViews: PropTypes.bool,
+    src: PropTypes.string,
+    title: PropTypes.string,
+    type: PropTypes.string,
+    views: PropTypes.oneOfType([PropTypes.number, PropTypes.string])
+};
+
+Thumbnail.defaultProps = {
+    alt: '',
+    avatar: '',
+    href: '#',
+    linkTitle: true,
+    showAvatar: false,
+    showFavorites: false,
+    showLoves: false,
+    showRemixes: false,
+    showViews: false,
+    src: '',
+    title: 'Project',
+    type: 'project'
+};
 
 module.exports = Thumbnail;

src/components/title-banner/title-banner.jsx

@@ -1,21 +1,18 @@
-var classNames = require('classnames');
-var React = require('react');
+const classNames = require('classnames');
+const PropTypes = require('prop-types');
+const React = require('react');
 
 require('./title-banner.scss');
 
-var TitleBanner = React.createClass({
-    type: 'TitleBanner',
-    render: function () {
-        var classes = classNames(
-            'title-banner',
-            this.props.className
-        );
-        return (
-            <div className={classes}>
-                {this.props.children}
+const TitleBanner = props => (
+    <div className={classNames('title-banner', props.className)}>
+        {props.children}
     </div>
-        );
-    }
-});
+);
+
+TitleBanner.propTypes = {
+    children: PropTypes.node,
+    className: PropTypes.string
+};
 
 module.exports = TitleBanner;

src/components/tooltip/tooltip.jsx

@@ -1,33 +1,39 @@
-var classNames = require('classnames');
-var React = require('react');
+const classNames = require('classnames');
+const PropTypes = require('prop-types');
+const React = require('react');
 
 require('./tooltip.scss');
 
-var Tooltip = React.createClass({
-    type: 'Tooltip',
-    getDefaultProps: function () {
-        return {
-            title: '',
-            tipContent: ''
-        };
-    },
-    render: function () {
-        var classes = classNames(
+const Tooltip = props => (
+    <span
+        className={classNames(
             'tooltip',
-            this.props.className,
-            {overmax: (this.props.currentCharacters > this.props.maxCharacters)}
-        );
-        return (
-            <span className={classes}>
+            props.className,
+            {overmax: (props.currentCharacters > props.maxCharacters)}
+        )}
+    >
         <span className="tip">
-                    <img src="/svgs/tooltip/info.svg" alt="info icon" />
+            <img
+                alt="info icon"
+                src="/svgs/tooltip/info.svg"
+            />
         </span>
         <span className="expand">
-                    {this.props.tipContent}
+            {props.tipContent}
         </span>
     </span>
-        );
-    }
-});
+);
+
+Tooltip.propTypes = {
+    className: PropTypes.string,
+    currentCharacters: PropTypes.number,
+    maxCharacters: PropTypes.number,
+    tipContent: PropTypes.node
+};
+
+Tooltip.defaultProps = {
+    title: '',
+    tipContent: ''
+};
 
 module.exports = Tooltip;

src/components/ttt-tile/ttt-tile.jsx

@@ -1,30 +1,21 @@
-var classNames = require('classnames');
-var React = require('react');
-var FormattedMessage = require('react-intl').FormattedMessage;
+const classNames = require('classnames');
+const FormattedMessage = require('react-intl').FormattedMessage;
+const PropTypes = require('prop-types');
+const React = require('react');
 
 require('../forms/button.scss');
 require('./ttt-tile.scss');
 
-var TTTTile = React.createClass({
-    type: 'TTTTile',
-    propTypes: {
-        title: React.PropTypes.string.isRequired,
-        description: React.PropTypes.string,
-        thumbUrl: React.PropTypes.string.isRequired,
-        tutorialLoc: React.PropTypes.string.isRequired,
-        onGuideClick: React.PropTypes.func
-    },
-    render: function () {
-        var classes = classNames(
-            'ttt-tile',
-            this.props.className
-        );
-        return (
-            <div className={classes} >
-                <a href={this.props.tutorialLoc}>
+const TTTTile = props => (
+    <div className={classNames('ttt-tile', props.className)}>
+        <a href={props.tutorialLoc}>
             <div className="ttt-tile-tutorial">
                 <div className="ttt-tile-image">
-                            <img className="ttt-tile-image-img" src={this.props.thumbUrl} alt="" />
+                    <img
+                        alt=""
+                        className="ttt-tile-image-img"
+                        src={props.thumbUrl}
+                    />
                     <div className="ttt-tile-image-try">
                         <div className="button mod-ttt-try-button">
                             <FormattedMessage id="tile.tryIt" />
@@ -34,25 +25,44 @@ var TTTTile = React.createClass({
                 <div className="ttt-tile-info">
 
                     <div className="ttt-tile-tag">
-                                <FormattedMessage id='ttt.tutorial' defaultMessage='Tutorial'/>
+                        <FormattedMessage
+                            defaultMessage="Tutorial"
+                            id="ttt.tutorial"
+                        />
                     </div>
-                            <h4 className="ttt-tile-title">{this.props.title}</h4>
+                    <h4 className="ttt-tile-title">{props.title}</h4>
                     <p className="ttt-tile-description">
-                                {this.props.description}
+                        {props.description}
                     </p>
                 </div>
             </div>
 
         </a>
-                {this.props.onGuideClick && (
-                    <div className="ttt-tile-guides" onClick={this.props.onGuideClick}>
-                        <FormattedMessage id='tile.guides' defaultMessage='See Cards and Guides'/>
-                        <img className="ttt-tile-open-modal" src="/svgs/modal/open-blue.svg" />
+        {props.onGuideClick && (
+            <div
+                className="ttt-tile-guides"
+                onClick={props.onGuideClick}
+            >
+                <FormattedMessage
+                    defaultMessage="See Cards and Guides"
+                    id="tile.guides"
+                />
+                <img
+                    className="ttt-tile-open-modal"
+                    src="/svgs/modal/open-blue.svg"
+                />
             </div>
         )}
     </div>
-        );
-    }
-});
+);
+
+TTTTile.propTypes = {
+    className: PropTypes.string,
+    description: PropTypes.string,
+    onGuideClick: PropTypes.func,
+    thumbUrl: PropTypes.string.isRequired,
+    title: PropTypes.string.isRequired,
+    tutorialLoc: PropTypes.string.isRequired
+};
 
 module.exports = TTTTile;

src/components/welcome/welcome.jsx

@@ -1,69 +1,81 @@
-var React = require('react');
+const PropTypes = require('prop-types');
+const React = require('react');
 
-var Box = require('../box/box.jsx');
+const Box = require('../box/box.jsx');
 
 require('./welcome.scss');
 
-var Welcome = React.createClass({
-    type: 'Welcome',
-    propTypes: {
-        onDismiss: React.PropTypes.func
-    },
-    getDefaultProps: function () {
-        return {
+const Welcome = props => (
+    <Box
+        className="welcome"
+        moreHref="#"
+        moreProps={{
+            className: 'close',
+            title: 'Dismiss',
+            onClick: props.onDismiss
+        }}
+        moreTitle="x"
+        title={props.messages['welcome.welcomeToScratch']}
+    >
+        <div className="welcome-col blue">
+            <h4>
+                <a href="/projects/editor/?tip_bar=getStarted">
+                    {props.messages['welcome.learn']}
+                </a>
+            </h4>
+            <a href="/projects/editor/?tip_bar=getStarted">
+                <img
+                    alt="Get Started"
+                    src="/images/welcome-learn.png"
+                />
+            </a>
+        </div>
+        <div className="welcome-col green">
+            <h4>
+                <a href="/starter_projects/">
+                    {props.messages['welcome.tryOut']}
+                </a>
+            </h4>
+            <a href="/starter_projects/">
+                <img
+                    alt="Starter Projects"
+                    src="/images/welcome-try.png"
+                />
+            </a>
+        </div>
+        <div className="welcome-col pink">
+            <h4>
+                <a href="/studios/146521/">
+                    {props.messages['welcome.connect']}
+                </a>
+            </h4>
+            <a href="/studios/146521/">
+                <img
+                    alt="Connect"
+                    src="/images/welcome-connect.png"
+                />
+            </a>
+        </div>
+    </Box>
+);
+
+Welcome.propTypes = {
+    messages: PropTypes.shape({
+        'welcome.welcomeToScratch': PropTypes.string,
+        'welcome.learn': PropTypes.string,
+        'welcome.tryOut': PropTypes.string,
+        'welcome.connect': PropTypes.string
+    }),
+    onDismiss: PropTypes.func
+};
+
+Welcome.defaultProps = {
     messages: {
         'welcome.welcomeToScratch': 'Welcome to Scratch!',
         'welcome.learn': 'Learn how to make a project in Scratch',
         'welcome.tryOut': 'Try out starter projects',
         'welcome.connect': 'Connect with other Scratchers'
     }
-        };
-    },
-    render: function () {
-        return (
-            <Box title={this.props.messages['welcome.welcomeToScratch']}
-                 className="welcome"
-                 moreTitle="x"
-                 moreHref="#"
-                 moreProps={{
-                     className: 'close',
-                     title: 'Dismiss',
-                     onClick: this.props.onDismiss
-                 }}>
-
-                <div className="welcome-col blue">
-                    <h4>
-                        <a href="/projects/editor/?tip_bar=getStarted">
-                            {this.props.messages['welcome.learn']}
-                        </a>
-                    </h4>
-                    <a href="/projects/editor/?tip_bar=getStarted">
-                        <img src="/images/welcome-learn.png" alt="Get Started" />
-                    </a>
-                </div>
-                <div className="welcome-col green">
-                    <h4>
-                        <a href="/starter_projects/">
-                            {this.props.messages['welcome.tryOut']}
-                        </a>
-                    </h4>
-                    <a href="/starter_projects/">
-                        <img src="/images/welcome-try.png" alt="Starter Projects" />
-                    </a>
-                </div>
-                <div className="welcome-col pink">
-                    <h4>
-                        <a href="/studios/146521/">
-                            {this.props.messages['welcome.connect']}
-                        </a>
-                    </h4>
-                    <a href="/studios/146521/">
-                        <img src="/images/welcome-connect.png" alt="Connect" />
-                    </a>
-                </div>
-            </Box>
-        );
-    }
-});
+};
 
 module.exports = Welcome;

src/init.js

@@ -1,12 +1,12 @@
-var jar = require('./lib/jar');
-var Raven = require('raven-js');
+const jar = require('./lib/jar');
+const Raven = require('raven-js');
 
 /**
  * -----------------------------------------------------------------------------
  * Error handling
  * -----------------------------------------------------------------------------
  */
-(function () {
+(() => {
     if (process.env.SENTRY_DSN !== '') {
         Raven.config(process.env.SENTRY_DSN).install();
     }
@@ -17,22 +17,22 @@ var Raven = require('raven-js');
  * L10N
  * -----------------------------------------------------------------------------
  */
-(function () {
-    /**
+(() => {
+    /*
      * Bind locale code from cookie if available. Uses navigator language API as a fallback.
      *
      * @return {string}
      */
-    function updateLocale () {
-        var obj = jar.get('scratchlanguage');
+    const updateLocale = () => {
+        let obj = jar.get('scratchlanguage');
         if (typeof obj === 'undefined') {
             obj = window.navigator.userLanguage || window.navigator.language;
-            if (['pt','pt-pt','PT','PT-PT'].indexOf(obj) !== -1) {
+            if (['pt', 'pt-pt', 'PT', 'PT-PT'].indexOf(obj) !== -1) {
                 obj = 'pt-br'; // default Portuguese users to Brazilian Portuguese due to our user base. Added in 2.2.5.
             }
         }
         return obj;
-    }
+    };
 
     window._locale = updateLocale();
 })();

src/l10n.json

@@ -47,6 +47,9 @@
     "general.myClass": "My Class",
     "general.myClasses": "My Classes",
     "general.myStuff": "My Stuff",
+    "general.noDeletionTitle": "Your Account Will Not Be Deleted",
+    "general.noDeletionDescription": "Your account was scheduled for deletion but you logged in. Your account has been reactivated. If you didn’t request for your account to be deleted, you should {resetLink} to make sure your account is secure.",
+    "general.noDeletionLink": "change your password",
     "general.notRequired": "Not Required",
     "general.other": "Other",
     "general.offlineEditor": "Offline Editor",

src/lib/api.js

@@ -1,9 +1,9 @@
-var defaults = require('lodash.defaults');
-var xhr = require('xhr');
+const defaults = require('lodash.defaults');
+const xhr = require('xhr');
 
-var jar  = require('./jar');
-var log = require('./log');
-var urlParams = require('./url-params');
+const jar = require('./jar');
+const log = require('./log');
+const urlParams = require('./url-params');
 
 /**
  * Helper method that constructs requests to the scratch api.
@@ -12,9 +12,11 @@ var urlParams = require('./url-params');
  *       CSRF forgeries (see: https://www.squarefree.com/securitytips/web-developers.html#CSRF)
  *
  * It also takes in other arguments specified in the xhr library spec.
+ * 
+ * @param  {object}   opts     optional xhr args (see above)
+ * @param  {Function} callback [description]
  */
-
-module.exports = function (opts, callback) {
+module.exports = (opts, callback) => {
     defaults(opts, {
         host: process.env.API_HOST,
         headers: {},
@@ -40,26 +42,29 @@ module.exports = function (opts, callback) {
         opts.headers['Content-Type'] = 'application/x-www-form-urlencoded';
     }
 
-    var apiRequest = function (opts) {
-        if (opts.host !== '') {
+    const apiRequest = options => {
+        if (options.host !== '') {
             if ('withCredentials' in new XMLHttpRequest()) {
-                opts.useXDR = false;
+                options.useXDR = false;
             } else {
                 // For IE < 10, we must use XDR for cross-domain requests. XDR does not support
                 // custom headers.
-                opts.useXDR = true;
-                delete opts.headers;
-                if (opts.authentication) {
-                    var authenticationParams = ['x-token=' + opts.authentication];
-                    var parts = opts.uri.split('?');
-                    var qs = (parts[1] || '').split('&').concat(authenticationParams).join('&');
-                    opts.uri = parts[0] + '?' + qs;
+                options.useXDR = true;
+                delete options.headers;
+                if (options.authentication) {
+                    const authenticationParams = [`x-token=${options.authentication}`];
+                    const parts = options.uri.split('?');
+                    const qs = (parts[1] || '')
+                        .split('&')
+                        .concat(authenticationParams)
+                        .join('&');
+                    options.uri = `${parts[0]}?${qs}`;
                 }
             }
         }
-        xhr(opts, function (err, res, body) {
+        xhr(options, (err, res, body) => {
             if (err) log.error(err);
-            if (opts.responseType === 'json' && typeof body === 'string') {
+            if (options.responseType === 'json' && typeof body === 'string') {
                 // IE doesn't parse responses as JSON without the json attribute,
                 // even with responseType: 'json'.
                 // See https://github.com/Raynos/xhr/issues/123
@@ -73,25 +78,25 @@ module.exports = function (opts, callback) {
             // [{success: true, redirect: "/location/to/redirect"}]
             try {
                 if ('redirect' in body[0]) window.location = body[0].redirect;
-            } catch (err) {
+            } catch (e) {
                 // do nothing
             }
             callback(err, body, res);
         });
-    }.bind(this);
+    };
 
     if (typeof jar.get('scratchlanguage') !== 'undefined') {
-        opts.headers['Accept-Language'] = jar.get('scratchlanguage') + ', en;q=0.8';
+        opts.headers['Accept-Language'] = `${jar.get('scratchlanguage')}, en;q=0.8`;
     }
     if (opts.authentication) {
         opts.headers['X-Token'] = opts.authentication;
     }
     if (opts.useCsrf) {
-        jar.use('scratchcsrftoken', '/csrf_token/', function (err, csrftoken) {
+        jar.use('scratchcsrftoken', '/csrf_token/', (err, csrftoken) => {
             if (err) return log.error('Error while retrieving CSRF token', err);
             opts.headers['X-CSRFToken'] = csrftoken;
             apiRequest(opts);
-        }.bind(this));
+        });
     } else {
         apiRequest(opts);
     }

src/lib/country-data.js

@@ -1,22 +1,28 @@
 module.exports = {};
-var countries = module.exports.data = require('iso-3166-2').data;
+const countries = module.exports.data = require('iso-3166-2').data;
 
-module.exports.countryOptions = Object.keys(countries).map(function (code) {
-    return {value: code.toLowerCase(), label: countries[code].name};
-}).sort(function (a, b) {
-    return a.label < b.label ? -1 : 1;
-});
+module.exports.countryOptions = Object.keys(countries).map(code => ({
+    value: code.toLowerCase(),
+    label: countries[code].name
+}))
+    .sort((a, b) => {
+        if (a.label < b.label) {
+            return -1;
+        }
+        return 1;
+    });
 
-module.exports.subdivisionOptions =
-Object.keys(countries).reduce(function (subByCountry, code) {
-    subByCountry[code.toLowerCase()] = Object.keys(countries[code].sub).map(function (subCode) {
-        return {
+module.exports.subdivisionOptions = Object.keys(countries).reduce((subByCountry, code) => {
+    subByCountry[code.toLowerCase()] = Object.keys(countries[code].sub).map(subCode => ({
         value: subCode.toLowerCase(),
         label: countries[code].sub[subCode].name,
         type: countries[code].sub[subCode].type
-        };
-    }).sort(function (a, b) {
-        return a.label < b.label ? -1 : 1;
+    }))
+        .sort((a, b) => {
+            if (a.label < b.label) {
+                return -1;
+            }
+            return 1;
         });
     return subByCountry;
 }, {});

src/lib/format.js

@@ -1,34 +0,0 @@
-/**
- * Takes an ISO time and returns a string representing how long ago the date
- * represents. For example, "2015-01-01T00:00:00" becomes "1 minute ago".
- *
- * Based on "JavaScript Pretty Date"
- * Copyright (c) 2011 John Resig (ejohn.org)
- * Licensed under the MIT and GPL licenses.
- */
-
-var Format = {
-    date: function (stamp) {
-        stamp = (stamp || '').replace(/-/g,'/').replace(/[TZ]/g,' ');
-
-        var date = new Date(stamp);
-        var diff = (((new Date()).getTime() - date.getTime()) / 1000);
-        var day_diff = Math.floor(diff / 86400);
-            
-        if (isNaN(day_diff) || day_diff < 0 || day_diff >= 31) {
-            return 'A while ago';
-        }
-                
-        return day_diff == 0 && (
-                diff < 60 && 'Just now' ||
-                diff < 120 && '1 minute ago' ||
-                diff < 3600 && Math.floor( diff / 60 ) + ' minutes ago' ||
-                diff < 7200 && '1 hour ago' ||
-                diff < 86400 && Math.floor( diff / 3600 ) + ' hours ago') ||
-            day_diff == 1 && 'Yesterday' ||
-            day_diff < 7 && day_diff + ' days ago' ||
-            day_diff < 31 && Math.ceil( day_diff / 7 ) + ' weeks ago';
-    }
-};
-
-module.exports = Format;

src/lib/frameless.js

@@ -1,9 +1,10 @@
 /* This file contains breakpoints from _frameless.scss, to be used in MediaQuery elements.
  * All units are in px, as per _frameless.scss and the MediaQuery default arguments.
  */
-
-module.exports = {
+const frameless = {
     desktop: 942,
     tablet: 640,
     mobile: 480
 };
+
+module.exports = frameless;

src/lib/intl.jsx

@@ -1,20 +1,20 @@
-var requireAll = require('./require-all');
-var ReactIntl = require('react-intl');
+const requireAll = require('./require-all');
+const ReactIntl = require('react-intl');
 
-var allLocaleData = requireAll(require.context('react-intl/locale-data', true, /^\.\/.*\.js$/));
-var customLocaleData = require('../../custom-locales.json');
+const allLocaleData = requireAll(require.context('react-intl/locale-data', true, /^\.\/.*\.js$/));
+const customLocaleData = require('../../custom-locales.json');
 
 /**
   * Add all locales
   */
-for (var locale in allLocaleData) {
+for (const locale in allLocaleData) {
     ReactIntl.addLocaleData(allLocaleData[locale]);
 }
 
 /**
  * Add custom locales to react-intl if it doesn't have them.
  */
-for (var customLocale in customLocaleData) {
+for (const customLocale in customLocaleData) {
     ReactIntl.addLocaleData(customLocaleData[customLocale]);
 }
 

src/lib/jar.js

@@ -1,7 +1,7 @@
-var cookie = require('cookie');
-var defaults = require('lodash.defaults');
-var xhr = require('xhr');
-var pako = require('pako');
+const cookie = require('cookie');
+const defaults = require('lodash.defaults');
+const xhr = require('xhr');
+const pako = require('pako');
 
 /**
  * Module that handles coookie interactions.
@@ -11,16 +11,16 @@ var pako = require('pako');
  * set(name, value) – synchronously sets the cookie
  * use(name, uri, callback) – can by sync or async, gets cookie from the uri if not there.
  */
-var Jar = {
-    unsign: function (value, callback) {
+const Jar = {
+    unsign: (value, callback) => {
         // Return the usable content portion of a signed, compressed cookie generated by
         // Django's signing module
         // https://github.com/django/django/blob/stable/1.8.x/django/core/signing.py
         if (typeof value === 'undefined') return callback(null, value);
         
         try {
-            var b64Data = value.split(':')[0];
-            var decompress = false;
+            let b64Data = value.split(':')[0];
+            let decompress = false;
             if (b64Data[0] === '.') {
                 decompress = true;
                 b64Data = b64Data.substring(1);
@@ -29,24 +29,29 @@ var Jar = {
             // Django makes its base64 strings url safe by replacing + and / with - and _ respectively
             // using base64.urlsafe_b64encode
             // https://docs.python.org/2/library/base64.html#base64.b64encode
-            b64Data = b64Data.replace(/[-_]/g, function (c) {return {'-':'+', '_':'/'}[c]; });
-            var strData = atob(b64Data);
+            b64Data = b64Data.replace(
+                /[-_]/g,
+                c => ({
+                    '-': '+',
+                    '_': '/'
+                }[c])
+            );
+            let strData = atob(b64Data);
 
             if (decompress) {
-                var charData = strData.split('').map(function (c) { return c.charCodeAt(0); });
-                var binData = new Uint8Array(charData);
-                var data = pako.inflate(binData);
+                const charData = strData.split('').map(c => (c.charCodeAt(0)));
+                const binData = new Uint8Array(charData);
+                const data = pako.inflate(binData);
                 strData = String.fromCharCode.apply(null, new Uint16Array(data));
             }
-
             return callback(null, strData);
         } catch (e) {
             return callback(e);
         }
     },
-    get: function (name, callback) {
+    get: (name, callback) => {
         // Get cookie by name
-        var obj = cookie.parse(document.cookie) || {};
+        const obj = cookie.parse(document.cookie) || {};
 
         // Handle optional callback
         if (typeof callback === 'function') {
@@ -56,44 +61,44 @@ var Jar = {
 
         return obj[name];
     },
-    use: function (name, uri, callback) {
+    use: (name, uri, callback) => {
         // Attempt to get cookie
-        Jar.get(name, function (err, obj) {
+        Jar.get(name, (err, obj) => {
             if (typeof obj !== 'undefined') return callback(null, obj);
 
             // Make XHR request to cookie setter uri
             xhr({
                 uri: uri
-            }, function (err) {
-                if (err) return callback(err);
+            }, e => {
+                if (e) return callback(e);
                 Jar.get(name, callback);
             });
         });
     },
-    set: function (name, value, opts) {
+    set: (name, value, opts) => {
         opts = opts || {};
         defaults(opts, {
             expires: new Date(new Date().setYear(new Date().getFullYear() + 1))
         });
         opts.path = '/';
-        var obj = cookie.serialize(name, value, opts);
+        const obj = cookie.serialize(name, value, opts);
         document.cookie = obj;
     },
-    getUnsignedValue: function (cookieName, signedValue, callback) {
+    getUnsignedValue: (cookieName, signedValue, callback) => {
         // Get a value from a signed object
-        Jar.get(cookieName, function (err, value) {
+        Jar.get(cookieName, (err, value) => {
             if (err) return callback(err);
             if (typeof value === 'undefined') return callback(null, value);
             
-            Jar.unsign(value, function (err, contents) {
-                if (err) return callback(err);
+            Jar.unsign(value, (e, contents) => {
+                if (e) return callback(e);
                 
                 try {
-                    var data = JSON.parse(contents);
-                } catch (err) {
-                    return callback(err);
-                }
+                    const data = JSON.parse(contents);
                     return callback(null, data[signedValue]);
+                } catch (error) {
+                    return callback(error);
+                }
             });
         });
     }

src/lib/log.js

@@ -1,4 +1,4 @@
-var minilog = require('minilog');
+const minilog = require('minilog');
 minilog.enable();
 
 module.exports = minilog('www');

src/lib/render.jsx

@@ -1,21 +1,27 @@
-var redux = require('redux');
-var thunk = require('redux-thunk').default;
+const redux = require('redux');
+const thunk = require('redux-thunk').default;
 // JSX syntax transforms to React.createElement
-var React = require('react'); // eslint-disable-line
-var ReactDOM = require('react-dom');
-var StoreProvider = require('react-redux').Provider;
+const React = require('react'); // eslint-disable-line
+const ReactDOM = require('react-dom');
+const StoreProvider = require('react-redux').Provider;
 
-var IntlProvider = require('./intl.jsx').IntlProvider;
-var permissionsActions = require('../redux/permissions.js');
-var sessionActions = require('../redux/session.js');
-var reducer = require('../redux/reducer.js');
+const IntlProvider = require('./intl.jsx').IntlProvider;
+const permissionsActions = require('../redux/permissions.js');
+const sessionActions = require('../redux/session.js');
+const reducer = require('../redux/reducer.js');
 
 require('../main.scss');
 
-var render = function (jsx, element, reducers) {
+/**
+ * Function to render views into a full page
+ * @param  {object} jsx      jsx component of the view
+ * @param  {object} element  html element to render to on the template
+ * @param  {array}  reducers list of view-specific reducers
+ */
+const render = (jsx, element, reducers) => {
     // Get locale and messages from global namespace (see "init.js")
-    var locale = window._locale || 'en';
-    var messages = {};
+    let locale = window._locale || 'en';
+    let messages = {};
     if (typeof window._messages !== 'undefined') {
         if (typeof window._messages[locale] === 'undefined') {
             // Fall back on the split
@@ -28,8 +34,8 @@ var render = function (jsx, element, reducers) {
         messages = window._messages[locale];
     }
 
-    var allReducers = reducer(reducers);
-    var store = redux.createStore(
+    const allReducers = reducer(reducers);
+    const store = redux.createStore(
         allReducers,
         redux.applyMiddleware(thunk)
     );
@@ -37,7 +43,10 @@ var render = function (jsx, element, reducers) {
     // Render view component
     ReactDOM.render(
         <StoreProvider store={store}>
-            <IntlProvider locale={locale} messages={messages}>
+            <IntlProvider
+                locale={locale}
+                messages={messages}
+            >
                 {jsx}
             </IntlProvider>
         </StoreProvider>,

src/lib/require-all.js

@@ -1,5 +1,5 @@
-var requireAll = function (requireContext) {
-    return requireContext.keys().map(requireContext);
-};
+const requireAll = requireContext => (
+    requireContext.keys().map(requireContext)
+);
 
 module.exports = requireAll;

src/lib/shuffle.js

@@ -1,16 +1,12 @@
 /*
 * Function that shuffles an array using a Fisher-Yates shuffle.
 */
-
-module.exports.shuffle = function (arr) {
-    var i, j = 0;
-    var temp = null;
+module.exports.shuffle = arr => {
+    let i = 0;
+    let j = 0;
+    let temp = null;
     if (arr) {
-        var tempArray = arr.slice(0);
-    } else {
-        return arr;
-    }
-
+        const tempArray = arr.slice(0);
         for (i = arr.length - 1; i > 0; i -= 1) {
             j = Math.floor(Math.random() * (i + 1));
             temp = tempArray[i];
@@ -18,4 +14,6 @@ module.exports.shuffle = function (arr) {
             tempArray[j] = temp;
         }
         return tempArray;
+    }
+    return arr;
 };

src/lib/url-params.js

@@ -2,21 +2,18 @@
  * urlParams({a: 1, b: 2, c: 3})
  * // a=1&b=2&c=3
  */
-module.exports = function urlParams (values) {
-    return Object
-        .keys(values)
-        .map(function (key) {
-            var value = typeof values[key] === 'undefined' ? '' : values[key];
-            function encodeKeyValuePair (value) {
-                return [key, value]
-                    .map(encodeURIComponent)
-                    .join('=');
-            }
+const params = values => (
+    Object.keys(values).map(key => {
+        const value = typeof values[key] === 'undefined' ? '' : values[key];
+        const encodeKeyValuePair = val => (
+            [key, val].map(encodeURIComponent).join('=')
+        );
         if (Array.isArray(value)) {
             return value.map(encodeKeyValuePair).join('&');
-            } else {
-                return encodeKeyValuePair(value);
         }
+        return encodeKeyValuePair(value);
     })
-        .join('&');
-};
+        .join('&')
+);
+
+module.exports = params;

src/redux/conference-details.js

@@ -1,13 +1,13 @@
-var keyMirror = require('keymirror');
-var api = require('../lib/api');
+const keyMirror = require('keymirror');
+const api = require('../lib/api');
 
-var Types = keyMirror({
+const Types = keyMirror({
     SET_DETAILS: null,
     SET_DETAILS_FETCHING: null,
     SET_DETAILS_ERROR: null
 });
 
-module.exports.detailsReducer = function (state, action) {
+module.exports.detailsReducer = (state, action) => {
     if (typeof state === 'undefined') {
         state = {};
     }
@@ -23,49 +23,35 @@ module.exports.detailsReducer = function (state, action) {
     }
 };
 
-module.exports.setDetailsError = function (error) {
-    return {
+module.exports.setDetailsError = error => ({
     type: Types.SET_DETAILS_ERROR,
     error: error
-    };
-};
+});
 
-module.exports.setDetails = function (details) {
-    return {
+module.exports.setDetails = details => ({
     type: Types.SET_DETAILS,
     details: details
-    };
-};
+});
 
-module.exports.setDetailsFetching = function () {
-    return {
+module.exports.setDetailsFetching = () => ({
     type: Types.SET_DETAILS_FETCHING,
     fetching: true
-    };
-};
+});
 
-module.exports.startGetDetails = function (id) {
-    return function (dispatch) {
-        dispatch(module.exports.setDetailsFetching());
-        dispatch(module.exports.getDetails(id));
-    };
-};
-
-module.exports.getDetails = function (id) {
-    return function (dispatch) {
+module.exports.getDetails = id => (dispatch => {
     api({
-            uri: '/conference/' + id + '/details'
-        }, function (err, body) {
+        uri: `/conference/${id}/details`
+    }, (err, body) => {
         if (err) {
             dispatch(module.exports.setDetailsError(err));
             return;
         }
 
         if (typeof body !== 'undefined') {
-                var columns = body.columns;
+            const columns = body.columns;
             if (body.rows) {
-                    var details = body.rows[0];
-                    var detailsObject = details.reduce(function (prev, cur, index) {
+                const details = body.rows[0];
+                const detailsObject = details.reduce((prev, cur, index) => {
                     prev[columns[index]] = cur;
                     return prev;
                 }, {});
@@ -74,10 +60,13 @@ module.exports.getDetails = function (id) {
                 dispatch(module.exports.setDetailsError('Not Found'));
             }
             return;
-            } else {
+        }
         dispatch(module.exports.setDetailsError('An unexpected error occurred'));
         return;
-            }
     });
-    };
-};
+});
+
+module.exports.startGetDetails = id => (dispatch => {
+    dispatch(module.exports.setDetailsFetching());
+    dispatch(module.exports.getDetails(id));
+});

src/redux/conference-schedule.js

@@ -1,13 +1,13 @@
-var keyMirror = require('keymirror');
-var api = require('../lib/api');
+const keyMirror = require('keymirror');
+const api = require('../lib/api');
 
-var Types = keyMirror({
+const Types = keyMirror({
     SET_SCHEDULE: null,
     SET_SCHEDULE_FETCHING: null,
     SET_SCHEDULE_ERROR: null
 });
 
-module.exports.scheduleReducer = function (state, action) {
+module.exports.scheduleReducer = (state, action) => {
     if (typeof state === 'undefined') {
         state = {
             timeSlots: [],
@@ -26,40 +26,27 @@ module.exports.scheduleReducer = function (state, action) {
     }
 };
 
-module.exports.setSchedule = function (schedule) {
-    return {
+module.exports.setSchedule = schedule => ({
     type: Types.SET_SCHEDULE,
     schedule: schedule
-    };
-};
+});
 
-module.exports.setScheduleFetching = function () {
-    return {
+module.exports.setScheduleFetching = () => ({
     type: Types.SET_SCHEDULE_FETCHING,
     fetching: true
-    };
-};
+});
 
-module.exports.setScheduleError = function (error) {
-    return {
+module.exports.setScheduleError = error => ({
     type: Types.SET_SCHEDULE_ERROR,
     error: error
-    };
-};
-
-module.exports.startGetSchedule = function (day) {
-    return function (dispatch) {
-        dispatch(module.exports.setScheduleFetching());
-        dispatch(module.exports.getDaySchedule(day));
-    };
-};
+});
 
 // group periods of time by start time
-module.exports.sortTimeSlots = function (timeSlot1, timeSlot2) {
-    var timeSlot1Am = (timeSlot1.time.substr(timeSlot1.time.length - 1, timeSlot1.time.length) === 'a') ? true : false;
-    var timeSlot2Am = (timeSlot2.time.substr(timeSlot2.time.length - 1, timeSlot2.time.length) === 'a') ? true : false;
-    var timeSlot1Time = parseInt(timeSlot1.time.substr(0, timeSlot1.time.length - 1));
-    var timeSlot2Time = parseInt(timeSlot2.time.substr(0, timeSlot2.time.length - 1));
+module.exports.sortTimeSlots = (timeSlot1, timeSlot2) => {
+    const timeSlot1Am = (timeSlot1.time.substr(timeSlot1.time.length - 1, timeSlot1.time.length) === 'a');
+    const timeSlot2Am = (timeSlot2.time.substr(timeSlot2.time.length - 1, timeSlot2.time.length) === 'a');
+    let timeSlot1Time = parseInt(timeSlot1.time.substr(0, timeSlot1.time.length - 1), 10);
+    let timeSlot2Time = parseInt(timeSlot2.time.substr(0, timeSlot2.time.length - 1), 10);
     
     // convert to 24-hour for sorting
     if (timeSlot1Time !== 12 && !timeSlot1Am) {
@@ -71,40 +58,38 @@ module.exports.sortTimeSlots = function (timeSlot1, timeSlot2) {
     
     if (timeSlot1Time < timeSlot2Time) {
         return -1;
-    } else {
-        return 1;
     }
+    return 1;
 };
 
 /**
  * Gets the schedule for the given day from the api
- * @param  {String} day  Day of the conference (Thursday, Friday or Satrurday)
+ * @param  {string} day  Day of the conference (Thursday, Friday or Satrurday)
  *
- *  @return {Object}     Schedule for the day, broken into chunks
+ *  @return {object}     Schedule for the day, broken into chunks
  */
-module.exports.getDaySchedule = function (day) {
-    return function (dispatch) {
+module.exports.getDaySchedule = day => (dispatch => {
     api({
-            uri: '/conference/schedule/' + day
-        }, function (err, body) {
+        uri: `/conference/schedule/${day}`
+    }, (err, body) => {
         if (err) {
             dispatch(module.exports.setScheduleError(err));
             return;
         }
 
         if (typeof body !== 'undefined') {
-                var columns = body.columns;
-                var rows = body.rows || [];
+            const columns = body.columns;
+            const rows = body.rows || [];
             // Group events by the time period in which they occur (for presentation)
-                var scheduleByTimeSlot = rows.reduce(function (prev, cur) {
-                    var cleanedRow = {};
-                    for (var i = 0; i < columns.length; i++) {
+            const scheduleByTimeSlot = rows.reduce((prev, cur) => {
+                const cleanedRow = {};
+                for (let i = 0; i < columns.length; i++) {
                     if (cur[i].length > 0) {
                         cleanedRow[columns[i]] = cur[i];
                     }
                 }
-                    cleanedRow['uri'] = '/conference/2016/' + cleanedRow.rowid + '/details';
-                    var timeSlot = cleanedRow.Chunk + cleanedRow.Start;
+                cleanedRow.uri = `/conference/2016/${cleanedRow.rowid}/details`;
+                const timeSlot = cleanedRow.Chunk + cleanedRow.Start;
                 if (typeof prev.timeSlots[timeSlot] === 'undefined') {
                     prev.timeSlots[timeSlot] = [cleanedRow];
                     prev.info.push({
@@ -118,21 +103,22 @@ module.exports.getDaySchedule = function (day) {
             }, {timeSlots: [], info: []});
 
             scheduleByTimeSlot.info.sort(module.exports.sortTimeSlots);
-                var schedule = scheduleByTimeSlot.info.map(function (timeSlot) {
-                    return {
+            const schedule = scheduleByTimeSlot.info.map(timeSlot => ({
                 info: timeSlot,
                 items: scheduleByTimeSlot.timeSlots[timeSlot.name + timeSlot.time]
-                    };
-                });
+            }));
             dispatch(module.exports.setSchedule({
                 timeSlots: schedule,
                 day: day
             }));
             return;
-            } else {
+        }
         dispatch(module.exports.setScheduleError('An unexpected error occurred'));
         return;
-            }
     });
-    };
-};
+});
+
+module.exports.startGetSchedule = day => (dispatch => {
+    dispatch(module.exports.setScheduleFetching());
+    dispatch(module.exports.getDaySchedule(day));
+});

src/redux/message-count.js

@@ -1,22 +1,22 @@
-var keyMirror = require('keymirror');
-var defaults = require('lodash.defaults');
+const keyMirror = require('keymirror');
+const defaults = require('lodash.defaults');
 
-var api = require('../lib/api');
+const api = require('../lib/api');
 
-var Types = keyMirror({
+const Types = keyMirror({
     SET_MESSAGE_COUNT: null,
     SET_MESSAGE_COUNT_ERROR: null,
     SET_STATUS: null
 });
 
-module.exports.getInitialState = function (){
-    return {messageCount: 0};
-};
+const getInitialState = () => ({
+    messageCount: 0
+});
 
-module.exports.messageCountReducer = function (state, action) {
+module.exports.messageCountReducer = (state, action) => {
     // Reducer for handling changes to session state
     if (typeof state === 'undefined') {
-        state = module.exports.getInitialState();
+        state = getInitialState();
     }
     switch (action.type) {
     case Types.SET_MESSAGE_COUNT:
@@ -31,40 +31,32 @@ module.exports.messageCountReducer = function (state, action) {
     }
 };
 
-module.exports.setSessionError = function (error) {
-    return {
+module.exports.setSessionError = error => ({
     type: Types.SET_MESSAGE_COUNT_ERROR,
     error: error
-    };
-};
+});
 
-module.exports.setCount = function (count) {
-    return {
+module.exports.setCount = count => ({
     type: Types.SET_MESSAGE_COUNT,
     count: count
-    };
-};
+});
 
-module.exports.setStatus = function (status){
-    return {
+module.exports.setStatus = status => ({
     type: Types.SET_STATUS,
     status: status
-    };
-};
+});
 
-module.exports.getCount = function (username) {
-    return function (dispatch) {
+module.exports.getCount = username => (dispatch => {
     api({
         method: 'get',
-            uri: '/users/' + username + '/messages/count'
-        }, function (err, body) {
+        uri: `/users/${username}/messages/count`
+    }, (err, body) => {
         if (err) {
             dispatch(module.exports.setCount(0));
             dispatch(module.exports.setSessionError(err));
             return;
         }
-            var count = parseInt(body.count, 10);
+        const count = parseInt(body.count, 10);
         dispatch(module.exports.setCount(count));
     });
-    };
-};
+});

src/redux/messages.js

@@ -1,10 +1,10 @@
-var defaults = require('lodash.defaults');
-var defaultsDeep = require('lodash.defaultsdeep');
-var keyMirror = require('keymirror');
+const defaults = require('lodash.defaults');
+const defaultsDeep = require('lodash.defaultsdeep');
+const keyMirror = require('keymirror');
 
-var api = require('../lib/api');
-var log = require('../lib/log');
-var messageCountActions = require('./message-count.js');
+const api = require('../lib/api');
+const log = require('../lib/log');
+const messageCountActions = require('./message-count.js');
 
 module.exports.Status = keyMirror({
     FETCHED: null,
@@ -17,8 +17,7 @@ module.exports.Status = keyMirror({
     DELETE_ERROR: null
 });
 
-module.exports.getInitialState = function () {
-    return {
+module.exports.getInitialState = () => ({
     status: {
         admin: module.exports.Status.NOT_FETCHED,
         message: module.exports.Status.NOT_FETCHED,
@@ -30,10 +29,9 @@ module.exports.getInitialState = function () {
         social: [],
         invite: {}
     }
-    };
-};
+});
 
-module.exports.messagesReducer = function (state, action) {
+module.exports.messagesReducer = (state, action) => {
     if (typeof state === 'undefined') {
         state = module.exports.getInitialState();
     }
@@ -68,61 +66,48 @@ module.exports.messagesReducer = function (state, action) {
     }
 };
 
-module.exports.setMessagesError = function (error) {
-    return {
+module.exports.setMessagesError = error => ({
     type: 'ERROR',
     error: error
-    };
-};
+});
 
-module.exports.setMessages = function (messages) {
-    return {
+module.exports.setMessages = messages => ({
     type: 'SET_MESSAGES',
     messages: messages
-    };
-};
+});
 
-module.exports.setMessagesOffset = function (offset) {
-    return {
+module.exports.setMessagesOffset = offset => ({
     type: 'SET_MESSAGES_OFFSET',
     offset: offset
-    };
-};
+});
 
-module.exports.setAdminMessages = function (messages) {
-    return {
+module.exports.setAdminMessages = messages => ({
     type: 'SET_ADMIN_MESSAGES',
     messages: messages
-    };
-};
+});
 
-module.exports.setScratcherInvite = function (invite) {
-    return {
+module.exports.setScratcherInvite = invite => ({
     type: 'SET_SCRATCHER_INVITE',
     invite: invite
-    };
-};
+});
 
-module.exports.setStatus = function (type, status){
-    return {
+module.exports.setStatus = (type, status) => ({
     type: type,
     status: status
-    };
-};
+});
 
 /**
  * Sends a request to mark one's unread messages count as cleared.
  * @return {null} returns nothing
  */
-module.exports.clearMessageCount = function () {
-    return function (dispatch) {
+module.exports.clearMessageCount = () => (dispatch => {
     dispatch(module.exports.setStatus('CLEAR_STATUS', module.exports.Status.FETCHING));
     api({
         host: '',
         uri: '/site-api/messages/messages-clear/',
         method: 'POST',
         useCsrf: true
-        }, function (err, body) {
+    }, (err, body) => {
         if (err) {
             dispatch(module.exports.setStatus('CLEAR_STATUS', module.exports.Status.CLEAR_ERROR));
             dispatch(module.exports.setMessagesError(err));
@@ -135,8 +120,7 @@ module.exports.clearMessageCount = function () {
         }
         dispatch(module.exports.setStatus('CLEAR_STATUS', module.exports.Status.FETCHED));
     });
-    };
-};
+});
 
 /**
  * Marks an admin message as read, dismissing it from the page
@@ -146,8 +130,8 @@ module.exports.clearMessageCount = function () {
  * @param  {object[]} adminMessages current list of admin messages retrieved
  * @return {null}                   returns nothing
  */
-module.exports.clearAdminMessage = function (messageType, messageId, messageCount, adminMessages) {
-    return function (dispatch) {
+module.exports.clearAdminMessage = (messageType, messageId, messageCount, adminMessages) => (
+    dispatch => {
         dispatch(module.exports.setStatus('CLEAR_STATUS', module.exports.Status.FETCHING));
         api({
             host: '',
@@ -158,7 +142,7 @@ module.exports.clearAdminMessage = function (messageType, messageId, messageCoun
                 alertType: messageType,
                 alertId: messageId
             }
-        }, function (err, body) {
+        }, (err, body) => {
             if (err) {
                 dispatch(module.exports.setStatus('DELETE_STATUS', module.exports.Status.DELETE_ERROR));
                 dispatch(module.exports.setMessagesError(err));
@@ -175,9 +159,9 @@ module.exports.clearAdminMessage = function (messageType, messageId, messageCoun
                 dispatch(module.exports.setScratcherInvite({}));
             } else {
                 // find the admin message and remove it
-                var toRemove = -1;
-                for (var i in adminMessages) {
-                    if (adminMessages[i].id === messageId) {
+                let toRemove = -1;
+                for (const i of adminMessages) {
+                    if (i.id === messageId) {
                         toRemove = i;
                         break;
                     }
@@ -188,8 +172,8 @@ module.exports.clearAdminMessage = function (messageType, messageId, messageCoun
             dispatch(messageCountActions.setCount(messageCount - 1));
             dispatch(module.exports.setStatus('DELETE_STATUS', module.exports.Status.FETCHED));
         });
-    };
-};
+    }
+);
 
 /**
  * Gets a user's messages to be displayed on the /messages page
@@ -201,7 +185,7 @@ module.exports.clearAdminMessage = function (messageType, messageId, messageCoun
  * @param  {string}   [opts.filter]      type of messages to return
  * @return {null}                     returns nothing
  */
-module.exports.getMessages = function (username, token, opts) {
+module.exports.getMessages = (username, token, opts) => {
     opts = defaults(opts, {
         messages: [],
         offset: 0,
@@ -209,17 +193,17 @@ module.exports.getMessages = function (username, token, opts) {
         clearCount: true
     });
 
-    var filterArg = '';
+    let filterArg = '';
     if (opts.filter.length > 0) {
-        filterArg = '&filter=' + opts.filter;
+        filterArg = `&filter=${opts.filter}`;
     }
 
-    return function (dispatch) {
+    return dispatch => {
         dispatch(module.exports.setStatus('MESSAGE_STATUS', module.exports.Status.FETCHING));
         api({
-            uri: '/users/' + username + '/messages?limit=40&offset=' + opts.offset + filterArg,
+            uri: `/users/${username}/messages?limit=40&offset=${opts.offset}${filterArg}`,
             authentication: token
-        }, function (err, body) {
+        }, (err, body) => {
             if (err) {
                 dispatch(module.exports.setStatus('MESSAGE_STATUS', module.exports.Status.MESSAGES_ERROR));
                 dispatch(module.exports.setMessagesError(err));
@@ -246,13 +230,12 @@ module.exports.getMessages = function (username, token, opts) {
  * @param  {string} token    the user's unique token for auth
  * @return {null}            returns nothing
  */
-module.exports.getAdminMessages = function (username, token) {
-    return function (dispatch) {
+module.exports.getAdminMessages = (username, token) => (dispatch => {
     dispatch(module.exports.setStatus('ADMIN_STATUS', module.exports.Status.FETCHING));
     api({
-            uri: '/users/' + username + '/messages/admin',
+        uri: `/users/${username}/messages/admin`,
         authentication: token
-        }, function (err, body) {
+    }, (err, body) => {
         if (err) {
             dispatch(module.exports.setStatus('ADMIN_STATUS', module.exports.Status.ADMIN_ERROR));
             dispatch(module.exports.setMessagesError(err));
@@ -268,8 +251,7 @@ module.exports.getAdminMessages = function (username, token) {
         dispatch(module.exports.setAdminMessages(body));
         dispatch(module.exports.setStatus('ADMIN_STATUS', module.exports.Status.FETCHED));
     });
-    };
-};
+});
 
 /**
  * Gets the invitation to become a Scratcher for a user, if one exists
@@ -277,12 +259,11 @@ module.exports.getAdminMessages = function (username, token) {
  * @param  {string} token    the user's unique token for auth
  * @return {null}            returns nothing
  */
-module.exports.getScratcherInvite = function (username, token) {
-    return function (dispatch) {
+module.exports.getScratcherInvite = (username, token) => (dispatch => {
     api({
-            uri: '/users/' + username + '/invites',
+        uri: `/users/${username}/invites`,
         authentication: token
-        }, function (err, body) {
+    }, (err, body) => {
         if (err) {
             dispatch(module.exports.setStatus('ADMIN_STATUS', module.exports.Status.INVITE_ERROR));
             dispatch(module.exports.setMessagesError(err));
@@ -292,5 +273,4 @@ module.exports.getScratcherInvite = function (username, token) {
         if (typeof body === 'undefined') return dispatch(module.exports.setMessagesError('No session content'));
         dispatch(module.exports.setScratcherInvite(body));
     });
-    };
-};
+});

src/redux/navigation.js

@@ -1,11 +1,11 @@
-var keyMirror = require('keymirror');
+const keyMirror = require('keymirror');
 
-var Types = keyMirror({
+const Types = keyMirror({
     SET_SEARCH_TERM: null
 });
 
-module.exports.navigationReducer = function (state, action) {
-    if(typeof state === 'undefined') {
+module.exports.navigationReducer = (state, action) => {
+    if (typeof state === 'undefined') {
         state = '';
     }
     switch (action.type) {
@@ -16,9 +16,7 @@ module.exports.navigationReducer = function (state, action) {
     }
 };
 
-module.exports.setSearchTerm = function (searchTerm) {
-    return {
+module.exports.setSearchTerm = searchTerm => ({
     type: Types.SET_SEARCH_TERM,
     searchTerm: searchTerm
-    };
-};
+});

src/redux/permissions.js

@@ -1,14 +1,14 @@
-var keyMirror = require('keymirror');
-var jar = require('../lib/jar.js');
+const keyMirror = require('keymirror');
+const jar = require('../lib/jar.js');
 
-var Types = keyMirror({
+const Types = keyMirror({
     SET_PERMISSIONS: null,
     SET_PERMISSIONS_ERROR: null
 });
 
-module.exports.permissionsReducer = function (state, action) {
+module.exports.permissionsReducer = (state, action) => {
     if (typeof state === 'undefined') {
-        state = '';
+        state = {};
     }
     switch (action.type) {
     case Types.SET_PERMISSIONS:
@@ -20,21 +20,20 @@ module.exports.permissionsReducer = function (state, action) {
     }
 };
 
-module.exports.storePermissions = function (permissions) {
+module.exports.storePermissions = permissions => {
     permissions = permissions || {};
-    return function (dispatch) {
+    return dispatch => {
         jar.set('permissions', permissions, {
-            encode: function (value) {
-                return encodeURIComponent(JSON.stringify(value));
-            }
+            encode: value => (
+                encodeURIComponent(JSON.stringify(value))
+            )
         });
         return dispatch(module.exports.setPermissions(permissions));
     };
 };
 
-module.exports.getPermissions = function () {
-    return function (dispatch) {
-        jar.get('permissions', function (err, value) {
+module.exports.getPermissions = () => (dispatch => {
+    jar.get('permissions', (err, value) => {
         if (err) return dispatch(module.exports.setPermissionsError(err));
 
         try {
@@ -44,19 +43,14 @@ module.exports.getPermissions = function () {
         }
         return dispatch(module.exports.setPermissions(value));
     });
-    };
-};
+});
 
-module.exports.setPermissions = function (permissions) {
-    return {
+module.exports.setPermissions = permissions => ({
     type: Types.SET_PERMISSIONS,
     permissions: permissions
-    };
-};
+});
 
-module.exports.setPermissionsError = function (error) {
-    return {
+module.exports.setPermissionsError = error => ({
     type: Types.SET_PERMISSIONS_ERROR,
     error: error
-    };
-};
+});

src/redux/reducer.js

@@ -1,9 +1,9 @@
-var combineReducers = require('redux').combineReducers;
-var defaults = require('lodash.defaults');
+const combineReducers = require('redux').combineReducers;
+const defaults = require('lodash.defaults');
 
-var messageCountReducer = require('./message-count.js').messageCountReducer;
-var permissionsReducer = require('./permissions.js').permissionsReducer;
-var sessionReducer = require('./session.js').sessionReducer;
+const messageCountReducer = require('./message-count.js').messageCountReducer;
+const permissionsReducer = require('./permissions.js').permissionsReducer;
+const sessionReducer = require('./session.js').sessionReducer;
 
 /**
  * Returns a combined reducer to be used for a page in `render.jsx`.
@@ -11,11 +11,11 @@ var sessionReducer = require('./session.js').sessionReducer;
  * - and any reducers specific to the page should be passed into
  * `render()` as an object (which will then be passed to the function
  * below).
- * @param  {Object} opts key/value where the key is the name of the
+ * @param  {object} opts key/value where the key is the name of the
  *                       redux state, value is the reducer function.
- * @return {Object}      combined reducer to be used in the redux store
+ * @return {object}      combined reducer to be used in the redux store
  */
-module.exports = function (opts) {
+module.exports = opts => {
     opts = opts || {};
     return combineReducers(defaults(opts, {
         session: sessionReducer,