melonJS 2 is a modern version of the melonJS game engine. It has been rebuilt almost entirely using ES6 class, inheritance and semantic, and is bundled using Rollup to provide modern features such as transpiling and tree-shaking.
Note: melonJS 2 is a work in progress and will break your game (No more Jay inheritance, and no backward compatibility with deprecated APIs), unless you want to contribute to the development or want to live on the edge, use the current unstable version at your "own risk". If you are looking at the stable legacy version of melonJS, you can find it here under the legacy branch.
melonJS is open-source, licensed under the MIT License, and actively developed and maintained by small team of enthusiasts at AltByte in Singapore.
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 all major browsers (Chrome, Safari, Firefox, Opera, Edge) and mobile devices
- Fast WebGL renderer for desktop and mobile devices with fallback to Canvas rendering
- High DPI resolution & Canvas advanced auto scaling
- Web Audio support with fallback to Multi-channel HTML5 audio
- 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 such as PhysicsEditor
- Advanced math API for Vector and Matrix
- Tween Effects, Transition effects
- Basic set of Object Entities and GUI elements included
- Pooling support for object recycling
- Basic Particle System
- Sprite with Animation management
- Standard spritesheet, single and multiple Packed Textures support
- 3rd party tools support for Texture Packing such as TexturePacker, Free Texture Packer, ShoeBox
- A state manager (to easily manage loading, menu, options, in-game state)
- Tiled map format version +1.0 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)
- Animated and multiple Tileset support
- Tileset transparency settings
- Layers alpha and tinting 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 3rd party Application Wrappers such as Cordova
- Asynchronous publish/subscribe pattern messaging support (minPubSub)
- A fully customizable preloader
- As light as ~70kb minified & gzipped, before tree-shaking
Basic Example
import * as me from "melonjs.module.js";
me.device.onReady(function () {
// initialize the display canvas once the device/browser is ready
if (!me.video.init(1218, 562, {parent : "screen", scale : "auto"})) {
alert("Your browser does not support HTML5 canvas.");
return;
}
// add a gray background to the default Stage
me.game.world.addChild(new me.ColorLayer("background", "#202020"));
// add a font text display object
me.game.world.addChild(new me.Text(609, 281, {
font: "Arial",
size: 160,
fillStyle: "#FFFFFF",
textBaseline : "middle",
textAlign : "center",
text : "Hello World !"
}));
});
Simple hello world using melonJS 9.x or higher
Documentation :
- Online API (offline version under the
docs
directory) - Examples
For your first time using melonJS, follow these tutorials :
- Platformer Step by Step Tutorial.
- Space Invaders Step by Step Tutorial.
You may find it useful to skim the overview found at the wiki Details & Usage
When starting your own projects, checkout the boilerplate
The latest builds with corresponding release note are available for direct download here.
Since version 10.0.0 melonJS provides different build options :
build | description |
---|---|
melonjs.module.js |
the ES6 Module (ESM) Bundle |
melonjs.module.d.ts |
typescript declaration file for the ES6 Module (ESM) Bundle |
melonjs.js |
a ES5 UMD Bundle (directly transpiled from the ES6 version) |
melonjs.min.js |
a minified version of the ES5 UMD bundle |
Alternatively, the latest version of melonJS can be installed through NPM :
$ npm install melonjs
If you need to import the ES6 module of melonjs (for Webpack):
$ import * as me from 'melonjs/dist/melonjs.module.js';
Note: when using the es6 module, deprecated methods need to be manually applied, see here
Or can simply be added to your html, through a content delivery network (CDN) URL, using for example :
<!-- load the ES5 UMD bundle of melonJS v10.0.0 -->
<script src="https://cdn.jsdelivr.net/npm/melonjs@10.0.0/dist/melonjs.js"></script>
<!-- load the ES6 module bundle of melonJS v10.0.0 -->
<script src="https://cdn.jsdelivr.net/npm/melonjs@10.0.0/dist/melonjs.module.js"></script>
<!-- omit the version completely to get the latest one -->
<!-- you should NOT use this in production -->
<script src="https://cdn.jsdelivr.net/npm/melonjs/dist/melonjs.js"></script>
<!-- add ".min" to any JS/CSS file to get a minified version -->
<script src="https://cdn.jsdelivr.net/npm/melonjs@10.0.0/dist/melonjs.min.js"></script>
and of course the debug panel :
<!-- load the latest debug panel -->
<script src="https://cdn.jsdelivr.net/npm/melonjs/plugins/debug/debugPanel.js"></script>
<!-- or a specific corresponding release -->
<script src="https://cdn.jsdelivr.net/npm/melonjs@9.0.0/plugins/debug/debugPanel.js"></script>
Note: "official" CDN and NPM install are only available from version 7.0.0 and onwards. Note: current version of both the tutorials and the debugPanel are not compatible with the ES6 version.
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 :
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 :
melonjs.js
: plain ES5 UMD bundlemelonjs.min.js
: minified ES5 UMD bundlemelonjs.module.js
: plain ES6 module
To run the melonJS test suite simply use 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).
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
melonJS uses Travis-CI for automated testing and build uploads. The latest build artifacts can be downloaded from the melonjs-builds bucket.
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.