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    a fresh & lightweight javascript game engine
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    Build Status Language grade: JavaScript Build Size Dependencies Inline docs jsDeliver

    A fresh & lightweight HTML5 game engine


    Copyright (C) 2011 - 2020 Olivier Biot

    melonJS is licensed under the MIT License

    About melonJS

    melonJS is the result of our enthusiasm & experiments with Javascript, and currently features :

    • A fresh & lightweight 2D sprite-based engine
    • Standalone library (does not rely on anything else, except a HTML5 capable browser)
    • Compatible with most major browsers (Chrome, Safari, Firefox, Opera, IE) and mobile devices
    • Fast Canvas and WebGL rendering on desktop and mobile devices
    • High DPI resolution & canvas auto scaling
    • Multi-channel HTML5 audio support and Web Audio on supported devices
    • Lightweight physics implementation to ensure low cpu requirements
    • Polygon (SAT) based collision algorithm for accurate detection and response
    • Fast Broad-phase collision detection using spatial partitioning
    • 3rd party tools support for physic body definition (PhysicEditor, Physic Body Editor)
    • Advanced math API for Vector and Matrix
    • Tween Effects
    • Transition effects
    • A basic set of Object Entities (to be extended)
    • Object Pooling
    • Basic Particle System
    • Basic animation management
    • Standard spritesheet, single and multiple Packed Textures (Texture Packer, ShoeBox) support
    • A state manager (to easily manage loading, menu, options, in-game state)
    • Tiled map format version +0.9.x integration for easy level design
      • Uncompressed Plain, Base64, CSV and JSON encoded XML tilemap loading
      • Orthogonal, Isometric and Hexagonal maps (both normal and staggered)
      • Multiple layers (multiple background/foreground, collision and Image layers)
      • Multiple Tileset support
      • Tileset Transparency settings
      • Layers Alpha settings
      • Rectangle, Ellipse, Polygon and Polyline objects support
      • Tiled Objects
      • Flipped & rotated Tiles
      • Dynamic Layer and Object/Group ordering
      • Dynamic Entity loading
      • Shape based Tile collision support
    • System & bitmap fonts
    • Mouse and Touch device support (with mouse emulation)
    • Device motion & accelerometer support
    • Built-in support for CocoonJS and Ejecta-using-Ejecta)
    • Asynchronous messaging support (minPubSub)
    • Basic GUI elements included
    • Customizable loader

    Using melonJS

    For your first time using melonJS, follow these tutorials :

    You may find it useful to skim the overview found at the wiki Details & Usage

    When starting your own projects, checkout the boilerplate

    Download melonJS

    The latest build (plain and minified) with corresponding release note is available for direct download here.

    Alternatively, the latest version of melonJS can be installed through NPM :

    $ npm install melonjs

    Or can simply be added to your html, through a content delivery network (CDN) URL, using for example :

    <script src=""></script>

    or the following for the minified version :

    <script src=""></script>

    and of course the debug panel :

    <script src=""></script>

    Note: "official" CDN and NPM install are only available from version 7.0.0 and onwards.

    Building melonJS

    For most users, all you probably want is to use melonJS, and all you need then is just to download the latest built release to get started. The only time you should need to build melonJS is if you want to contribute to the project and start developing on it.

    To build your own version of melonJS you will need to install :

    • The Node.js JavaScript runtime and the NPM package manager

    Once Node.js and NPM have been installed, you need to install build dependencies, by executing the following in the folder where you cloned the repository :

    $ [sudo] npm install

    Then build the melonJS source by running:

    $ npm run build

    The generated library will be available under the build directory.

    Building the documentation

    Similarly, you can build your own copy of the docs locally by running :

    $ npm run doc

    The generated documentation will be available in the docs directory


    To run melonJS tests in node simply run the following:

    $ npm run test

    This will run the jasmine spec tests with the output displayed on the shell. Do note that the latest Chrome version is required, as the test unit will run the Browser in a headless mode (in case of failed tests, upgrade your browser).

    WIP Builds

    melonJS uses Travis-CI for automated testing and build uploads. The latest build artifacts can be downloaded from the melonjs-builds bucket.

    Questions, need help ?

    If you need technical support, you can contact us through the following channels :

    For any other non technical related questions, feel free to also send us an email.

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