<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Transition动画</title>
<style>
div {
width:200px;
height:160px;
background-color:red;
border-radius:30px;
/*指定背景色、宽度、高度会以平滑渐变的方式来改变指定动画持续时间为2秒，动画会延迟2秒才启动*/
-moz-transition:background-color 2s linear 2s,width 2s linear 2s,height 2s linear 2s;
-webkit-transition:background-color 2s linear 2s,width 2s linear 2s,height 2s linear 2s;
-o-transition:background-color 2s linear 2s,width 2s linear 2s,height 2s linear 2s;
}
button {
width:70px;
height:35px;
margin:10px;
}
</style>
<script>
var orignWidth = 200;
var orignHeight = 160;
var zoom = function (scale,bgColor) {
var target=document.getElementById("target")
target.style.width = orignWidth * scale + "px";
target.style.height = orignHeight * scale + "px";
target.style.background = bgColor;
}
</script>
</head>
<body>
<button onclick="zoom(2,'blue')">放大</button>
<button onclick="zoom(0.5,'yellow')" >缩小</button>
<button onclick="zoom(1,'pink')">恢复</button>
<div id="target" style="color:#000; font-size:24px; line-height:160px; font-weight:bold; text-align:center; ">小蕾</div>
</body>
</html>