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@@ -0,0 +1,53 @@
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+<!DOCTYPE html>
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+<html lang="en">
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+
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+<head>
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+ <meta charset="UTF-8">
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+ <title>Document</title>
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+ <style>
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+ .box {
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+ width: 200px;
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+ height: 50px;
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+ background-color: red;
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+ }
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+ </style>
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+</head>
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+
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+<body>
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+ <div class="box"></div>
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+ <script>
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+ var oBox = document.getElementsByClassName("box")[0];
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+ // 控制递增定时器
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+ var timer1 = null;
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+ // 控制递减定时器
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+ var timer2 = null;
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+ oBox.onmouseover = function () {
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+ clearInterval(timer2);
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+ var _width = oBox.offsetWidth;
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+ timer1 = setInterval(function () {
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+ if (_width >= 600) {
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+ clearInterval(timer1);
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+ } else {
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+ _width += 10;
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+ oBox.style.width = _width + "px";
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+ }
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+ }, 16);
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+ }
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+
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+ oBox.onmouseout = function(){
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+ clearInterval(timer1);
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+ var _width = oBox.offsetWidth;
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+ timer2 = setInterval(function(){
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+ if(_width <= 200){
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+ clearInterval(timer2);
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+ }else{
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+ _width -= 10;
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+ oBox.style.width = _width + "px";
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+ }
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+ },16)
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+ }
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+ </script>
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+</body>
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+
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+</html>
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