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ifzhushi.html
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ifzhushi.html
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<!DOCTYPE html><html class="theme-next pisces use-motion" lang="zh-CN"><head><meta name="generator" content="Hexo 3.9.0"><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=2"><meta name="theme-color" content="#222"><link rel="apple-touch-icon" sizes="180x180" href="/images/icons/favicon-48.png?v=6.7.0"><link rel="icon" type="image/png" sizes="32x32" href="/images/icons/favicon-32.png?v=6.7.0"><link rel="icon" type="image/png" sizes="16x16" href="/images/icons/favicon-16.png?v=6.7.0"><link rel="mask-icon" href="/images/icons/logo.svg?v=6.7.0" color="#222"><link rel="alternate" href="/atom.xml" title="菠菜眾長" type="application/atom+xml"><meta http-equiv="Cache-Control" content="no-transform"><meta http-equiv="Cache-Control" content="no-siteapp"><link href="/lib/fancybox/source/jquery.fancybox.css" rel="stylesheet" type="text/css"><link 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itemtype="http://schema.org/Article"><div class="post-block"><link itemprop="mainEntityOfPage" href="https://lruihao.cn/posts/ifzhushi.html"><span hidden itemprop="author" itemscope itemtype="http://schema.org/Person"><meta itemprop="name" content="李瑞豪"><meta itemprop="description" content="从ACM到Web，分享程序、技巧、干货，记录心情、学习、成长！"><meta itemprop="image" content="/images/avatar.png"></span><span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization"><meta itemprop="name" content="菠菜眾長"></span><header class="post-header"><h2 class="post-title" itemprop="name headline"><span class="post-repost-flag" title="转发"><i class="fa fa-share-square-o"></i> </span>条件注释判断浏览器版本<!--[if lt IE 9]><a href="https://github.com/Lruihao/lruihao.github.io/tree/hexo/source/_posts/ifzhushi.md" class="post-edit-link" title="编辑" rel="external nofollow noopener noreferrer" target="_blank"><i class="fa fa-pencil"></i></a></h2><div class="post-meta"><span class="post-time"><span class="post-meta-item-icon"><i class="fa fa-calendar-o"></i> </span><span class="post-meta-item-text">发表于</span> <time title="创建时间：2019-05-10 13:08:27" itemprop="dateCreated datePublished" datetime="2019-05-10T13:08:27+08:00">2019-05-10</time> </span><span class="post-category"><span class="post-meta-divider">|</span> <span class="post-meta-item-icon"><i class="fa fa-folder-o"></i> </span><span class="post-meta-item-text">分类于</span> <span itemprop="about" itemscope itemtype="http://schema.org/Thing"><a href="/categories/Frontend/" itemprop="url" rel="index"><span itemprop="name">Frontend</span></a></span> </span><span class="post-comments-count"><span class="post-meta-divider">|</span> <span class="post-meta-item-icon"><i class="fa fa-comment-o"></i> </span><span class="post-meta-item-text">评论数： </span><a href="/posts/ifzhushi.html#comments" itemprop="discussionUrl"><span class="post-comments-count valine-comment-count" data-xid="/posts/ifzhushi.html" itemprop="commentCount"></span> </a></span><span id="/posts/ifzhushi.html" class="leancloud_visitors" data-flag-title="条件注释判断浏览器版本<!--[if lt IE 9]>"><span class="post-meta-divider">|</span> <span title="阅读次数"><span class="post-meta-item-icon"><i class="fa fa-eye"></i> </span><span class="post-meta-item-text">阅读次数：</span> <span class="leancloud-visitors-count"></span></span></span><div class="post-symbolscount"><span class="post-meta-divider">|</span> <span class="post-meta-item-icon"><i class="fa fa-file-word-o"></i> </span><span class="post-meta-item-text">本文字数：</span> <span title="本文字数">576</span> <span class="post-meta-divider">|</span> <span class="post-meta-item-icon"><i class="fa fa-clock-o"></i> </span><span class="post-meta-item-text">阅读时长 ≈</span> <span title="阅读时长">2 分钟</span></div></div></header><div class="post-body" itemprop="articleBody"><div class="note"><p><span><!–[if !IE]><!–> 除IE外都可识别 <!–<![endif]–></span><br><span><!–[if IE]> 所有的IE可识别 <![endif]–></span><br><span><!–[if IE 6]> 仅IE6可识别 <![endif]–></span><br><span><!–[if lt IE 6]> IE6以及IE6以下版本可识别 <![endif]–></span><br><span><!–[if gte IE 6]> IE6以及IE6以上版本可识别 <![endif]–></span><br><span><!–[if IE 7]> 仅IE7可识别 <![endif]–></span><br><span><!–[if lt IE 7]> IE7以及IE7以下版本可识别 <![endif]–></span><br><span><!–[if gte IE 7]> IE7以及IE7以上版本可识别 <![endif]–></span><br><span><!–[if IE 8]> 仅IE8可识别 <![endif]–></span><br><span><!–[if IE 9]> 仅IE9可识别 <![endif]–></span></p></div><a id="more"></a><table border="2" align="center"><tbody><tr><th width="50">项目</th><th width="150">范例</th><th>说明</th></tr><tr><td align="middle">!</td><td>[if !IE]</td><td>The NOT operator. This is placed immediately in front of the <em>feature</em>, <em>operator</em>, or <em>subexpression</em> to reverse the Boolean meaning of the expression.<br>NOT运算符。这是摆立即在前面的<em>功能</em>，<em>操作员</em>，或<em>子表达式</em>扭转布尔表达式的意义。</td></tr><tr><td align="middle">lt</td><td>[if lt IE 5.5]</td><td>The less-than operator. Returns true if the first argument is less than the second argument.<br>小于运算符。如果第一个参数小于第二个参数，则返回true。</td></tr><tr><td align="middle">lte</td><td>[if lte IE 6]</td><td>The less-than or equal operator. Returns true if the first argument is less than or equal to the second argument.<br>小于或等于运算。如果第一个参数是小于或等于第二个参数，则返回true。</td></tr><tr><td align="middle">gt</td><td>[if gt IE 5]</td><td>The greater-than operator. Returns true if the first argument is greater than the second argument.<br>大于运算符。如果第一个参数大于第二个参数，则返回true。</td></tr><tr><td align="middle">gte</td><td>[if gte IE 7]</td><td>The greater-than or equal operator. Returns true if the first argument is greater than or equal to the second argument.<br>大于或等于运算。如果第一个参数是大于或等于第二个参数，则返回true。</td></tr><tr><td align="middle">( )</td><td>[if !(IE 7)]</td><td>Subexpression operators. Used in conjunction with boolean operators to create more complex expressions.<br>子表达式运营商。在与布尔运算符用于创建更复杂的表达式。</td></tr><tr><td align="middle">&</td><td>[if (gt IE 5)&(lt IE 7)]</td><td>The AND operator. Returns true if all subexpressions evaluate to true<br>AND运算符。如果所有的子表达式计算结果为true，返回true</td></tr><tr><td align="middle">|</td><td>[if (IE 6)|(IE 7)]</td><td>The OR operator. Returns true if any of the subexpressions evaluates to true.<br>OR运算符。返回true，如果子表达式计算结果为true。</td></tr></tbody></table><figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment"><!--[if lt IE 9]></span></span><br><span class="line"><span class="comment">加载CSS1</span></span><br><span class="line"><span class="comment"><!--[else]></span></span><br><span class="line"><span class="comment">加载CSS2</span></span><br><span class="line"><span class="comment"><![endif]--></span></span><br></pre></td></tr></table></figure><p>这样有效是有效,但是用HTML VALIDATOR里,报错,因为这个不符合XHTML 1.1的规范,<br>如果把ELSE语句去掉,则正确.</p><figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">加载CSS2</span><br><span class="line"><span class="comment"><!--[if lt IE 9]></span></span><br><span class="line"><span class="comment">加载CSS1(可以把要重写的写在这里).</span></span><br><span class="line"><span class="comment"><![endif]--></span></span><br></pre></td></tr></table></figure></div><div class="popular-posts-header"><i class="fa fa-link"></i> 相关文章</div><!--[if !IE]><!--><details><summary style="cursor:pointer">点击查看</summary><!--<![endif]--><ul class="popular-posts"><li class="popular-posts-item"><div class="popular-posts-title"><a href="\posts\js-device.html" rel="bookmark">js判断用户设备类型及平台</a></div></li><li class="popular-posts-item"><div class="popular-posts-title"><a href="\posts\ms-html-css.html" rel="bookmark">前端面试题-HTML+CSS</a></div></li><li class="popular-posts-item"><div class="popular-posts-title"><a href="\posts\jsoninfo.html" rel="bookmark">Python如何操作Json？</a></div></li><li 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e.stopPropagation();
if (isfetched === false) {
searchFunc(path, 'local-search-input', 'local-search-result');
} else {
proceedsearch();
};
});
$('.popup-btn-close').click(onPopupClose);
$('.popup').click(function(e){
e.stopPropagation();
});
$(document).on('keyup', function (event) {
var shouldDismissSearchPopup = event.which === 27 &&
$('.search-popup').is(':visible');
if (shouldDismissSearchPopup) {
onPopupClose();
}
});</script><script>!function(){var t=document.createElement("script"),e=window.location.protocol.split(":")[0];t.src="https"===e?"https://zz.bdstatic.com/linksubmit/push.js":"http://push.zhanzhang.baidu.com/push.js";var s=document.getElementsByTagName("script")[0];s.parentNode.insertBefore(t,s)}()</script><script src="/lib/pangu/dist/pangu.min.js?v=3.3"></script><script type="text/javascript">pangu.spacingPage()</script><script src="/lib/bookmark/bookmark.min.js?v=1.0"></script><script type="text/javascript">bookmark.scrollToMark("manual","#更多")</script><script>!function(e){var r=Array.prototype.slice.call(document.querySelectorAll("img[data-original]"));function t(){for(var c=0;c<r.length;c++)t=r[c],void 0,0<=(n=t.getBoundingClientRect()).top&&0<=n.left&&n.top<=(e.innerHeight||document.documentElement.clientHeight)&&function(){var t,n,e,i,o=r[c];t=o,n=function(){r=r.filter(function(t){return o!==t})},e=new Image,i=t.getAttribute("data-original"),e.onload=function(){t.src=i,n&&n()},e.src=i}();var t,n}t(),e.addEventListener("scroll",function(){!function(t,n){clearTimeout(t.tId),t.tId=setTimeout(function(){t.call(n)},500)}(t,e)})}(this);</script></body></html>