CSS border-bottom-color 属性动画-在线运行代码案例-大卫编程网

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS border-bottom-color 属性动画示例- 基础教程(div.cn)</title>
<style>
.animated {
    width: 300px;
    padding: 40px 0;
    font: bold 46px sans-serif;
    text-align: center;
    background: #f5d8f4;    
    border: 20px solid orchid;
    -webkit-animation: test 4s infinite; /* Chrome, Safari, Opera */
    animation: test 4s infinite;
}
/* Chrome, Safari, Opera */
@-webkit-keyframes test {
    50% {border-bottom-color: indigo;}
}
/* Standard syntax */
@keyframes test {
    50% {border-bottom-color: indigo;}
}
</style>
</head>
<body>
    
<p> <strong>警告：</strong>：CSS动画在Internet Explorer 9和更早版本中不起作用。</p>
​
<p> <strong>注意</strong>：以下DIV元素底边框的颜色从其初始值“orchid”变为“indigo”，然后再次返回至初始值“orchid色”，循环播放。</p>
    <div class="animated">Box</div>
</body>
</html>