EaselJS
EaselJS is a library for building high-performance interactive 2D content in HTML5. It provides a feature-rich display
list to allow you to manipulate and animate graphics. It also provides a robust interactive model for mouse and touch
interactions.
It is excellent for building games, generative art, ads, data visualization, and other highly graphical experiences. It
works well alone, or with the rest of the CreateJS suite: SoundJS,
PreloadJS, and TweenJS.
It has no external dependencies, and should be compatible with virtually any framework you enjoy using.
Simple Example
var stage = new createjs.Stage('myCanvas');
var shape = new createjs.Shape();
shape.graphics.beginFill('red').drawRect(0, 0, 120, 120);
stage.addChild(shape);
stage.update();
Sprite Animation Example
var ss = new createjs.SpriteSheet({
frames: {
width: 32,
height: 64,
numFrames: 19
},
animations: {run: [0, 25], jump: [26, 63, "run"]},
images: ["./assets/runningGrant.png"]
});
var sprite = new createjs.Sprite(ss, "run");
sprite.scaleY = sprite.scaleX = 0.4;
stage.addChild(sprite);
sprite.on("click", function() { sprite.gotoAndPlay("jump"); });
createjs.Ticker.on("tick", stage);
Support and Resources
It was built by gskinner.com, and is released for free under the MIT license, which means you
can use it for almost any purpose (including commercial projects). We appreciate credit where possible, but it is not a
requirement.
Classes
The API is inspired in part by Flash's display list, and should be easy to pick up for both JS and AS3 developers. Check
out the docs for more information.
DisplayObject
Abstract base class for all display elements in EaselJS. Exposes all of the display properties (ex. x, y, rotation,
scaleX, scaleY, skewX, skewY, alpha, shadow, etc) that are common to all display objects.
Stage
The root level display container for display elements. Each time tick() is called on Stage, it will update and render
the display list to its associated canvas.
Container
A nestable display container, which lets you aggregate display objects and manipulate them as a group.
Bitmap
Draws an image, video or canvas to the canvas according to its display properties.
Sprite
Displays single frames or animations from sprite sheets, and provides APIs for managing playback and sequencing.
Shape
Renders a Graphics object within the context of the display list.
Graphics
Provides an easy to use API for drawing vector data. Can be used with Shape, or completely stand alone.
Text
Renders a single line of text to the stage.
BitmapText
Renders text using a SpriteSheet of letter.
DOMElement
An experimental display object that allows you to manage an HTML element as a part of the display list.
Filter
The base filter class that other filters (ex. BlurFilter, ColorMatrixFilter, etc) extend.
There are also a few helper classes included:
Shadow
Defines all of the properties needed to display a shadow on a display object.
Ticker
Provides a pausable centralized tick manager for ticking Stage instances or other time based code.
UID
Very simple class that provides global, incremental unique numeric IDs.
SpriteSheet
Encapsulates all the data associated with a sprite sheet to be used with Sprite.
SpriteSheetUtils
Contains utility methods for extending existing sprite sheets with flipped frames and extracting individual frames.
SpriteSheetBuilder
Build a bitmap SpriteSheet from vector graphics at run time. Get the filesize savings of vector, with the performance
of a SpriteSheet.
Matrix2D
Represents a 3x3 affine transformation matrix. Used internally for calculating concatenated transformations.
Rectangle
Represents a rectangle as defined by the points (x, y) and (x+width, y+height).
Point
Represents a point on a 2 dimensional x / y coordinate system.
A WebGL implementation currently exists, but is limited.
StageGL
A drop-in replacement for the EaselJS Stage class that fully supports a WebGL pipeline. StageGL will draw most Bitmap-
based content, including any cached DisplayObjects.
WebGLInspector
A utility and helper class designed to work with StageGL to help investigate and test performance or display problems.