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    A Brilliant Animator.

    Morpheus lets you "tween anything" in parallel on multiple elements; from colors to integers of any unit (px, em, %, etc), with easing transitions and bezier curves, including CSS3 transforms (roate, scale, skew, & translate) -- all in a single high-performant loop utilizing the CPU-friendly requestAnimationFrame standard.

    It looks like this:

    var anim = morpheus(elements, {
      // CSS 
        left: -50
      , top: 100
      , width: '+=50'
      , height: '-=50px'
      , fontSize: '30px'
      , color: '#f00'
      , transform: 'rotate(30deg) scale(+=3)'
      , "background-color": '#f00'
        // API 
      , duration: 500
      , easing: easings.easeOut
      , bezier: [[100, 200], [200, 100]]
      , complete: function () {
    // stop an animation 
    // jump to the end of an animation and run 'complete' callback 

    General Tweening

      function (position) {
        // do stuff with position... 
        // like for example, use bezier curve points :) 
        var xy = morpheus.bezier([[startX, startY], <[n control points]>, [endX, endY]], position)
      function () {
      100, // start 
      300 // end 


      * morpheus:
      * @param element(s): HTMLElement(s)
      * @param options: mixed bag between CSS Style properties & animation options
      *  - {n} CSS properties|values
      *     - value can be strings, integers,
      *     - or callback function that receives element to be animated. method must return value to be tweened
      *     - relative animations start with += or -= followed by integer
      *  - duration: time in ms - defaults to 1000(ms)
      *  - easing: a transition method - defaults to an 'easeOut' algorithm
      *  - complete: a callback method for when all elements have finished
      *  - bezier: array of arrays containing x|y coordinates that define the bezier points. defaults to none
      *     - this may also be a function that receives element to be animated. it must return a value
      * @return animation instance

    See the live examples

    Language LTR - RTL support

    For those who run web services that support languages spanning from LTR to RTL, you can use the drop-in plugin filed called rtltr.js found in the src directory which will automatically mirror all animations without having to change your implementation. It's pretty rad.

    Browser support

    Grade A & C Browsers according to Yahoo's Graded Browser Support. CSS3 transforms are only supported in browsers that support the transform specification.

    Ender integration

    Got Ender? No? Get it.

    $ npm install ender -g

    Add Morpheus to your existing Ender build

    $ ender add morpheus

    Write code like a boss:

    $('#content .boosh').animate({
      left: 911,
      complete: function () {

    Usage Notes


    If you're serious about *color animation*, there's a few precautions you'll need to take ahead of time. In order to morph *from* one color to another, you need to make sure the elements you're animating *have an inherited color style* to start with. Furthermore, those styles need to be represented in rgb, or hex, and not a named color (like red, or orange) -- that is unless you want to write code to map the [color conversion]( yourself.

    Therefore, at minimum, you need to set a color before animating. = '#ff0';
    morpheus(element, {
      color: '#000'

    With Bonzo installed in Ender.

    $('div.things').css('color', '#ff0').animate({
      color: '#000'


    If you're considering animating by a CSS unit of measurement like em, pt, or %, like-wise to color animation, you must set the size ahead of time before animating:
          fontSize: '2em'
        , width: '50%'
          fontSize: '+=1.5em'
        , width: '100%'

    You also get two other fancy fading hooks

    $('p').fadeIn(250, function () {
    $('p').fadeOut(500, function () {


    Transforms can be animated in browsers that support them (IE9, FF, Chrome, Safari, Opera). morpheus.transform provides a shortcut to the correct style property for the browser (webkitTransform, MozTransform, etc). Like animating on units or color, you must set the property ahead of time before animating:[morpheus.transform] = 'rotate(30deg) scale(1)'
    morpheus(element, {
      transform: 'rotate(0deg) scale(+=3)'

    AMD Support

    require('morpheus.js', function (morpheus) {
      morpheus(elements, config)
    or as usual with ender
    var morpheus = require('morpheus')


    If you're looking to contribute. Add your changes to src/morpheus.js Then run the following

    $ npm install smoosh -g
    $ npm install --dev
    $ make
    $ open tests/tests.html

    Morpheus (c) Dustin Diaz 2011 - License MIT

    Happy Morphing!




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