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<!DOCTYPE html> <html> <head> <style> #myDIV { width: 500px; background-color: lightblue; overflow: auto; border: 1px solid black; -webkit-animation: mymove 5s infinite; /* Chrome, Safari, Opera */ animation: mymove 5s infinite; } /* Chrome, Safari, Opera */ @-webkit-keyframes mymove { 50% {max-height: 100px;} } /* Standard syntax */ @keyframes mymove { 50% {max-height: 100px;} } </style> </head> <body> <p>Change the max-height, from "none" to "100px" and back to "none":<p> <div id="myDIV"> <p>This DIV element does not have a pre-defined height.</p> <p>An animation will change the max-height, from "none" to "100px".</p> <p>The height of this DIV element will not exceed 100 pixels.</p> </div> <p>The max-height property is <em>animatable</em> in CSS.</p> <p><b>Note:</b> Currently the max-height property is not changing <em>gradually</em> in Chrome, and does not change at all in Firefox.</p> <p><b>Note:</b> CSS Animations do not work in Internet Explorer 9 and earlier versions.</p> </body> </html>
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