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<!DOCTYPE html> <meta charset="utf-8"> <link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/> <script src="https://cdn.staticfile.org/jquery/2.2.4/jquery.min.js"></script> <script> $(document).ready(function(){ $("button").click(function(){ $("#span1").text($(window).width()); $("#span2").text($(document).width()); }); }); </script> <p>窗口宽度是 <span id="span1">未知</span> px.</p> <p>该文档的宽度是 <span id="span2">未知</span> px.</p> <button>返回窗口和文档元素的宽度</button> <footer>简单教程,简单编程<br/>Copyright © 简单教程 www.twle.cn</footer>
运行结果: