CSS z - index属性动画-在线运行代码案例-大卫编程网

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS z - index属性动画示例- 基础教程(div.cn)</title>
<style>
.container{
	position: relative;
}
.container div{
	width: 150px;
    height: 150px;
	padding: 5px;
	position: absolute;
	background: #76bf40;
	border: 1px solid #000;
	opacity: 0.3;
}
.container .animated {
	z-index: 0;
    background: #ffd700;	
    border: 1px solid #b79b00;
	opacity: 1;
    -webkit-animation: test 4s infinite; /* Chrome, Safari, Opera */
    animation: test 4s infinite;
}
/* Chrome, Safari, Opera */
@-webkit-keyframes test {
    50% {z-index: 4;}
}
/* Standard syntax */
@keyframes test {
    50% {z-index: 4;}
}
</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>：动画DIV框沿z轴的位置从其初始值“ 0”变为“ 4”，然后再次回到初始值“ 0”直至 无限次。</p>
	<div class="container">
		<div class="animated">Animated Box</div>
		<div style="top:30px; left:30px; z-index:1;">z-index 1</div>
		<div style="top:60px; left:60px; z-index:2;">z-index 2</div>
		<div style="top:90px; left:90px; z-index:3;">z-index 3</div>
	</div>
</body>
</html>