prismarine-web-client

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A Minecraft client running in a web page. Live demo at https://webclient.prismarine.js.org/

How it Works

prismarine-web-client runs mineflayer and prismarine-viewer in the browser, which connects over WebSocket to a proxy which translates the WebSocket connection into TCP to connect to normal Minecraft servers. Prismarine-web-client is based on:

• prismarine-viewer for the world rendering
• mineflayer for the high-level Minecraft client API

Check these modules if you want to understand more how it works and contribute!

Screenshot

Live Demo

Click on this link to open it in your browser, no installation necessary: https://webclient.prismarine.js.org/

Tested on Chrome & Firefox for desktop platforms.

Usage

To host it yourself, run these commands in bash:

$ npm install -g prismarine-web-client
$ prismarine-web-client

Finally, open http://localhost:8080 in your browser.

Features

• Display mobs and players
• Display blocks
• Movement (you can move, and you see entities moving live)
• Place and break blocks

Roadmap

• Containers (inventory, chests, etc.)
• Sounds
• More world interactions (attacking entities, etc.)
• Cosmetic rendering features (day night cycle, fog, etc.)

Development

If you're contributing/making changes, you need to install it differently.

First, clone the repo.

Then, set your working directory to that of the repo. For example:

$ cd ~/prismarine-web-client/

Finally, run

$ npm install
$ npm start

This will start express and webpack in development mode; whenever you save a file, the build will be redone (it takes 5s), and you can refresh the page to get the new result.

Connect to http://localhost:8080 in your browser.

You may want to disable auto saving in your IDE to avoid constant rebuilding; see https://webpack.js.org/guides/development/#adjusting-your-text-editor.

To check the production build (will take a minute to build), you can run npm run build-start.

If you're interested in contributing, you can check projects at https://github.com/PrismarineJS/prismarine-web-client/projects.

Some variables are exposed in the global window object for debugging:

• bot
• viewer
• mcData
• worldView
• Vec3
• pathfinder
• debugMenu

Adding stuff to the debugMenu

debugMenu.customEntries['myKey'] = 'myValue' delete debugMenu.customEntries['myKey']

Some debugging examples

In Chrome DevTools:

• bot.chat('test') allows you to use the chat
• bot.chat(JSON.stringify(Object.values(bot.players).map(({username, ping}) => ({username, ping})))) display the ping of everyone
• window.bot.entity.position.y += 5 jumps
• bot.chat(JSON.stringify(bot.findBlock({matching:(block) => block.name==='diamond_ore', maxDistance:256}).position)) finds the position of a diamond block
• bot.physics.stepHeight = 2 allows you to walk about blocks
• bot.physics.sprintSpeed = 5 walks faster
• bot.loadPlugin(pathfinder.pathfinder) then bot.pathfinder.goto(new pathfinder.goals.GoalXZ(100, 100)) goes to position 100, 100

For more debugging ideas, read the mineflayer doc.