A CSS3-enabled javascript animation library for node and the browser

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$ cnpm install moofx 
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moofx 3

moofx3 is a css3-enabled javascript animation library on caffeine. moofx3 is written in coffeescript, which is a neat language that compiles to fast javascript code.


  • uses css3 transitions whenever available, falls back to normal javascript animation otherwise.
  • supports animating lengths to different types of units, such as em, px, pt, %.
  • supports hsl colors for color-based properties.
  • supports transform animations in webkit browsers, firefox and ie9+.
  • also contains a very useful computedStyle normalizer.
  • framework agnostic, is easily pluggable in your favorite js framework.
  • cross browser (not sure exactly which browsers just yet).
  • small footprint (15k compressed, 5k gzipped).
  • animation state is managed internally. no more checks.


Every property in moofx can either be provided camelized (backgroundColor) or hyphenated (background-color). Colors can be provided as rbg (rgb(20,30,40)), rbga (rbga(20,30,40,0.5)), hsl (hsl(20,30,40)), hsla (hsla(20,30,40,0.5)) hex (#fa0, #ffaa00), or hexa (#ffaa00ff, #fa0f). Lengths will always be retrieved in pixels, unless they have a value of auto, and you are able to animate from to whatever length unit to whatever length unit.

moofx3 can animate the following properties: backgroundColor, color, backgroundSize, fontSize, height, width, marginTop, paddingTop, borderTopWidth, top, borderTopColor, borderTopStyle, marginRight, paddingRight, borderRightWidth, right, borderRightColor, borderRightStyle, marginBottom, paddingBottom, borderBottomWidth, bottom, borderBottomColor, borderBottomStyle, marginLeft, paddingLeft, borderLeftWidth, left, borderLeftColor, borderLeftStyle, borderTopLeftRadius, borderTopRightRadius, borderBottomRightRadius, borderBottomLeftRadius, zIndex, margin, padding, borderRadius, borderWidth, borderColor, borderTop, borderRight, borderBottom, borderLeft, border, opacity, and finally transform.


the moofx method takes as first argument either a collection of nodes (such as the return value of document.querySelectorAll) an array of nodes (such as the expected return value of every dom selector library available, such as Slick, or Sizzle), or a single node selected by whatever means.

It is however reccomended that you use moofx as part of a javascript library's api (see below).



The animate method accepts either an object made of styles, or a property and a value, followed by the optional options object.

moofx(nodes).animate({'background-color': '#ffa', 'color': 'black'}); //animate some styles, default options

moofx(nodes).animate('background-color', '#ffa'); //animate property to value

moofx(nodes).animate({'background-color': '#ffa', 'color': 'black'}, {duration: 500}); //animate styles using options (500ms duration)

moofx(nodes).animate('background-color', '#ffa', {duration: 500}); //animate property to value using options (500ms duration)

moofx(nodes).animate({'background-color': '#ffa'}, {duration: 5000}); //5s duration

moofx(nodes).animate({'background-color': '#ffa'}, {duration: "5000ms", equation: 'cubic-bezier(0.17,0.67,0.83,0.67)'}); //5s duration, cubic-bezier easing equation

moofx(nodes).animate({'background-color': '#ffa'}, {duration: "5s", equation: 'ease-in'}); //5s duration, ease-in easing equation

moofx(nodes).animate({'background-color': '#ffa'}, {duration: "5s", equation: 'ease-in-out', callback: function(){ //5s duration, ease-in-out easing equation, completion callback


The style method accepts either an object made of styles or property and a value.

moofx(nodes).style({'background-color': 'red', 'color': 'black'});  //set styles

moofx(nodes).style('background-color', 'rgba(0,0,0,0)'); //set style property to value


Computed style getter and normalizer. Note that lengths will always return in px (unless is "auto") and colors in rgba for consistency.

moofx(node).compute('background-color'); //get (normalized!) computed style of node for property

moofx.requestFrame / moofx.cancelFrame

moofx also provides an advanced requestAnimationFrame shim, that supports canceling and the standard time argument.

var callback = function(time){

moofx.requestFrame(callback); //sets callback to be executed on the next animationFrame
moofx.cancelFrame(callback); //whopsie, better not! callback will not get executed.

moofx.requestFrame(callback); //on second thought, let's do it
moofx.requestFrame(callback); //three
moofx.requestFrame(callback); //times

//and the time argument logged 3 times in your console will be the same, since the callbacks will get executed during the same animationFrame.


moofx also exports a simple any-to-rgb color converter, with a very basic, very straightforward usage:

moofx.color('#000'); //rgb(0, 0, 0)
moofx.color('#0000'); //rgba(0, 0, 0, 0)
moofx.color('#00000000'); //rgba(0, 0, 0, 0)

moofx.color('hsl(0, 0, 0)'); //rgb(0, 0, 0)
moofx.color('hsla(0, 0, 0, 0)'); //rgba(0, 0, 0, 0)


Include the pre-compiled moofx.js (or moofx-min.js) in the webpage of choice. Use it. Love it. Done.

moofx can also be installed and depended on with npm (and ender) or packager.


moofx was built to be used in conjuction with your favorite javascript framework. Some basic examples:

MooTools integration:

Element.implement('animate', function(){
	var moo = moofx(this);
	moo.apply(moo, arguments);
	return this;

jQuery integration:

jQuery.fn.animate = function(){
	var moo = moofx(this.get());
	moo.apply(moo, arguments);
	return this;

Then just get busy with your dollars.

ender integration

moofx integrates nicely with ender. While in ender (or in any other CommonJS env, for that matter), the moofx global variable will not be present. Refer to ender documentation for usage and installation of modules.

moofx even comes with a default ender adapter, automatically available when building via ender, that can be used like this:

$('#box').animate(…); //same as above
$('#box .boxes').style(…); //same as above

$.requestFrame(…) //same as above
$.cancelFrame(…) //same as above


moofx3 can be compiled using cake, which is installed with coffeescript.

This is how you compile a single moofx.js (both uncompressed and google-closure-compiled) from the .coffee source:

cake build

This is how you automatically recompile the javascripts in lib/ when the source .coffees in /src change.

cake watch

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