css animation max-width 实例 - 自学教程(runoops.com)

<!DOCTYPE html>
<html>

<head>
	<meta charset="utf-8">
	<title>css animation max-width 实例 - 自学教程(runoops.com)</title>
	<style>
		#myDIV {
			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-width: 600px;
			}
		}

/* Standard syntax */
		@keyframes mymove {
			50% {
				max-width: 600px;
			}
		}
	</style>
</head>

<body>

<p>逐步改变 max-width, 从 "none" 到 "600px":
	<p>

<div id="myDIV">
		<p>This DIV element does not have a pre-defined width.</p>
		<p>Try resizing the browser window to see that width of this DIV element will grow/shrink along width the
			resizing, but it will never exceed 600 pixels in width.</p>
	</div>

<p>max-width 属性支持动画效果。</p>
	<p><b>注意:</b> 目前 max-height 属性在 Chrome 浏览器下不会改变 <em>gradually（灰阶）</em>, 在 Firefox 都无法起作用。</p>
	<p><b>注意：</b>Internet Explorer 9 及更早 IE 版本不支持 CSS 动画。</p>

</body>

</html>