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.