Animating Colors

The YUI Animation Utility allows you to animate the colors of an HTMLElement.

For this example, we will animate the color (text) and background of a <div> element named demo.

First, a little style so that we can see the animation in action:

<style type="text/css"> #demo { background:#ccc; height:300px; width:300px; } </style>

Create the demo element and a button to run the animation:

<div id="demo">Demo</div> <button id="demo-run">run</button>

Now we create an instance of YAHOO.util.Anim, passing it the element we wish to animate, and the style attribute(s) to be animated:

<script type="text/javascript"> var attributes = { color: { to: '#06e' }, backgroundColor: { to: '#e06' } }; var anim = new YAHOO.util.ColorAnim('demo', attributes); </script>

The final step is to call the animate method on our instance to start the animation. The button will be the trigger that begins the animation sequence:

<script type="text/javascript"> YAHOO.util.Event.on(document, 'click', function() { anim.animate(); }); </script>

This is an example of animating multiple style attributes of an HTMLElement.

Configuration for This Example

You can load the necessary JavaScript and CSS for this example from Yahoo's servers. Click here to load the YUI Dependency Configurator with all of this example's dependencies preconfigured.