对浏览器窗口调整大小进行计数：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
<script src="https://cdn.bootcss.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
x=0;
$(document).ready(function(){
$(window).resize(function(){
$("span").text(x+=1);
});
});
</script>
</head>
<body>
<p>窗口重置了 <span>0</span> 次大小。</p>
<p>尝试重置窗口大小。</p>
</body>
</html>