CSS animation-duration 属性实例 - 自学教程(runoops.com)

<head>
    <meta charset="utf-8">
    <title>CSS animation-duration 属性 实例 - 自学教程(runoops.com)</title>
    <style>
        div {
            width: 100px;
            height: 100px;
            background: red;
            position: relative;
            animation: mymove infinite;
            animation-duration: 2s;

/* Safari and Chrome */
            -webkit-animation: mymove infinite;
            -webkit-animation-duration: 2s;
        }

@keyframes mymove {
            from {
                top: 0px;
            }

to {
                top: 200px;
            }
        }

@-webkit-keyframes mymove

/* Safari and Chrome */
            {
            from {
                top: 0px;
            }

to {
                top: 200px;
            }
        }
    </style>
</head>

<body>

<p><strong>注意:</strong> animation-duration属性不兼容 Internet Explorer 9 以及更早版本的浏览器.</p>

<p><b>注意:</b> 要指定动画属性。否则时间若是0,动画不会进行。</p>

</body>

</html>