javascript针对IE的文档加载IEContentLoaded
来源：互联网 发布：elfgame软件视频格式 编辑：程序博客网 时间：2024/06/08 03:07
参考文章：http://javascript.nwbox.com/IEContentLoaded/
1. IEContendLoaded.js
它的原理是，在IE下，DOM的某些方法只有在DOM解析完成后才可以调用，doScroll就是这样一个方法，反过来当能调用doScroll的时候即是DOM解析完成之时。在jquery的源码中也能看到如此对IE的特殊处理。
/* * * IEContentLoaded.js * * Author: Diego Perini (diego.perini at gmail.com) NWBOX S.r.l. * Summary: DOMContentLoaded emulation for IE browsers * Updated: 05/10/2007 * License: GPL * Version: TBD * * Copyright (C) 2007 Diego Perini & NWBOX S.r.l. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see http://javascript.nwbox.com/IEContentLoaded/GNU_GPL.txt. * */// @wwindow reference// @fnfunction referencefunction IEContentLoaded (w, fn) {var d = w.document, done = false,// only fire onceinit = function () {if (!done) {done = true;fn();}};// polling for no errors(function () {try {// throws errors until after ondocumentreadyd.documentElement.doScroll('left');} catch (e) {setTimeout(arguments.callee, 50);return;}// no errors, fireinit();})();// trying to always fire before onloadd.onreadystatechange = function() {if (d.readyState == 'complete') {d.onreadystatechange = null;init();}};}测试页面：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"><head><title>IEContentLoaded - TEST CASE</title><meta name="author" content="Diego Perini" /><meta name="copyright" content="Copyright (c) 2007, Diego Perini" /><!-- body background set to lime --><style type="text/css">/*<![CDATA[*/body { background-color: lime; }/*]]>*/</style><!-- load iecontentloaded script --><script type="text/javascript" src="iecontentloaded.js"></script><!-- body background set to green --><script type="text/javascript">//<![CDATA[var $tt = (new Date).getTime();function timeElapsed(t) { return ((new Date()).getTime() - t); }// only start this for Internet Explorerif (document.attachEvent && !window.opera) {IEContentLoaded(window,function () {document.body.style.backgroundColor = 'green';window.status += ' * IEContentLoaded ' + timeElapsed($tt) + ' ms.';alert("fn run")});}//]]></script></head><body><h1>IEContentLoaded - TEST CASE</h1><p><big>Back to <a href="index.html">IEContentLoaded INDEX</a>.</big></p><p>The objective of this test is to evaluate the detection reliability of this method.</p><p>In this specific case we are interested in determining when all the nodes in the<br />requested page have been loaded and parsed in the DOM and available to scripts.</p><p>The fact that images exists or not in the page shouldn't affect this test.</p><p>The test case executes these steps, in sequence, at different times:</p><ol> <li>INLINE STYLE is applied and the BODY background color is set to "lime"</li> <li>Ending BODY SCRIPT is executed and the background color is set to "red"</li> <li>IEContentLoaded function is fired and the background color is set to "green"</li></ol><p>The page should have a "green" background color after being loaded completely.<br />If that is not the case then something went wrong in my script or in your browser.</p><hr /><img src="run.jpg" alt="A test image for IEContentLoaded" /><hr /><h4>This filler ensure exceeding the default 4Kb output caching of Apache.</h4><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test 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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"><head><title>IEContentLoaded - TEST CASE</title><meta name="author" content="Diego Perini" /><meta name="copyright" content="Copyright (c) 2007, Diego Perini" /><!-- body background set to lime --><style type="text/css">/*<![CDATA[*/body { background-color: lime; }/*]]>*/</style><!-- load iecontentloaded script --><script type="text/javascript" src="iecontentloaded.js"></script><!-- body background set to green --><script type="text/javascript">//<![CDATA[var $tt = (new Date).getTime();function timeElapsed(t) { return ((new Date()).getTime() - t); }// only start this for Internet Explorerif (document.attachEvent && !window.opera) {IEContentLoaded(window,function () {document.body.style.backgroundColor = 'green';window.status += ' * IEContentLoaded ' + timeElapsed($tt) + ' ms.';});}//]]></script></head><body><h1>IEContentLoaded - TEST CASE</h1><p><big>Back to <a href="index.html">IEContentLoaded INDEX</a>.</big></p><p>The objective of this test is to evaluate the detection reliability of this method.</p><p>In this specific case we are interested in determining when all the nodes in the<br />requested page have been loaded and parsed in the DOM and available to scripts.</p><p>The fact that images exists or not in the page shouldn't affect this test.</p><p>The test case executes these steps, in sequence, at different times:</p><ol> <li>INLINE STYLE is applied and the BODY background color is set to "lime"</li> <li>Ending BODY SCRIPT is executed and the background color is set to "red"</li> <li>IEContentLoaded function is fired and the background color is set to "green"</li></ol><p>The page should have a "green" background color after being loaded completely.<br />If that is not the case then something went wrong in my script or in your browser.</p><hr /><h4>This filler ensure exceeding the default 4Kb output caching of Apache.</h4><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test 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test</span><span>test test test</span><span>test test test</span> <hr /><h4>This filler ensure exceeding the default 4Kb output caching of Apache.</h4><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test test test</span><span>test 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