Only expose VirtualMachine to window for bundles

package.json

@@ -20,6 +20,7 @@
   },
   "devDependencies": {
     "eslint": "2.7.0",
+    "expose-loader": "0.7.1",
     "highlightjs": "8.7.0",
     "json-loader": "0.5.4",
     "scratch-blocks": "git+https://git@github.com/LLK/scratch-blocks.git#develop",

src/index.js

@@ -228,8 +228,5 @@ VirtualMachine.prototype.emitWorkspaceUpdate = function () {
         'xml': this.editingTarget.blocks.toXML()
     });
 };
-/**
- * Export and bind to `window`
- */
+
 module.exports = VirtualMachine;
-if (typeof window !== 'undefined') window.VirtualMachine = module.exports;

webpack.config.js

@@ -14,6 +14,9 @@ module.exports = {
             {
                 test: /\.json$/,
                 loader: 'json-loader'
+            }, {
+                test: require.resolve('./src/index.js'),
+                loader: 'expose?VirtualMachine'
             }
         ]
     },