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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge" >
<title>杨杰 前端之路</title>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<meta name="description">
<meta property="og:type" content="website">
<meta property="og:title" content="杨杰 前端之路">
<meta property="og:url" content="http://yoursite.com/index.html">
<meta property="og:site_name" content="杨杰 前端之路">
<meta property="og:description">
<meta name="twitter:card" content="summary">
<meta name="twitter:title" content="杨杰 前端之路">
<meta name="twitter:description">
<link rel="alternative" href="/atom.xml" title="杨杰 前端之路" type="application/atom+xml">
<link rel="icon" href="/img/favicon.png">
<link rel="stylesheet" href="/css/style.css">
</head>
<body>
<div id="container">
<div class="left-col">
<div class="overlay"></div>
<div class="intrude-less">
<header id="header" class="inner">
<a href="/" class="profilepic">
<img lazy-src="/images/me.jpg" class="js-avatar">
</a>
<hgroup>
<h1 class="header-author"><a href="/">杨杰</a></h1>
</hgroup>
<div class="switch-btn">
<div class="icon">
<div class="icon-ctn">
<div class="icon-wrap icon-house" data-idx="0">
<div class="birdhouse"></div>
<div class="birdhouse_holes"></div>
</div>
<div class="icon-wrap icon-ribbon hide" data-idx="1">
<div class="ribbon"></div>
</div>
<div class="icon-wrap icon-link hide" data-idx="2">
<div class="loopback_l"></div>
<div class="loopback_r"></div>
</div>
<div class="icon-wrap icon-me hide" data-idx="3">
<div class="user"></div>
<div class="shoulder"></div>
</div>
</div>
</div>
<div class="tips-box hide">
<div class="tips-arrow"></div>
<ul class="tips-inner">
<li>Menu</li>
<li>Tags</li>
<li>Links</li>
<li>Über</li>
</ul>
</div>
</div>
<div class="switch-area">
<div class="switch-wrap">
<section class="switch-part switch-part1">
<nav class="header-menu">
<ul>
<li><a href="/">主页</a></li>
<li><a href="/archives">所有文章</a></li>
</ul>
</nav>
<nav class="header-nav">
<div class="social">
<a class="github" target="_blank" href="https://github.com/melodyJie" title="github">github</a>
<a class="weibo" target="_blank" href="http://weibo.com/u/5506889097" title="weibo">weibo</a>
</div>
</nav>
</section>
<section class="switch-part switch-part2">
<div class="widget tagcloud" id="js-tagcloud">
<a href="/tags/css/" style="font-size: 10px;">css</a> <a href="/tags/markdown/" style="font-size: 10px;">markdown</a>
</div>
</section>
<section class="switch-part switch-part3">
<div id="js-friends">
<a target="_blank" class="main-nav-link switch-friends-link" href="#">only me</a>
</div>
</section>
<section class="switch-part switch-part4">
<div id="js-aboutme">我是谁，我从哪里来，我到哪里去？我就是我，是颜色不一样的吃货…</div>
</section>
</div>
</div>
</header>
</div>
</div>
<div class="mid-col">
<nav id="mobile-nav">
<div class="overlay">
<div class="slider-trigger"></div>
<h1 class="header-author js-mobile-header hide">杨杰</h1>
</div>
<div class="intrude-less">
<header id="header" class="inner">
<div class="profilepic">
<img lazy-src="/images/me.jpg" class="js-avatar">
</div>
<hgroup>
<h1 class="header-author">杨杰</h1>
</hgroup>
<nav class="header-menu">
<ul>
<li><a href="/">主页</a></li>
<li><a href="/archives">所有文章</a></li>
<div class="clearfix"></div>
</ul>
</nav>
<nav class="header-nav">
<div class="social">
<a class="github" target="_blank" href="https://github.com/melodyJie" title="github">github</a>
<a class="weibo" target="_blank" href="http://weibo.com/u/5506889097" title="weibo">weibo</a>
</div>
</nav>
</header>
</div>
</nav>
<div class="body-wrap">
<article id="post-markdownMethord" class="article article-type-post" itemscope itemprop="blogPost">
<div class="article-meta">
<a href="/2016/05/08/markdownMethord/" class="article-date">
<time datetime="2016-05-08T14:16:28.000Z" itemprop="datePublished">2016-05-08</time>
</a>
</div>
<div class="article-inner">
<input type="hidden" class="isFancy" />
<header class="article-header">
<h1 itemprop="name">
<a class="article-title" href="/2016/05/08/markdownMethord/">markdownMethord</a>
</h1>
</header>
<div class="article-entry" itemprop="articleBody">
<p>#这里是一级标题</p>
<p>###这里是三级标题</p>
<p>######这里是六级标题，就到这里了，木有七级！</p>
<p>段落前面没有缩进，看到了吧。</p>
<p> 要想使用缩进，在中文输入法中改成「全角」输入，再按两个空格</p>
<p>行尾一个回车换行，显示效果依然是是一行。<br>我说的对吧~</p>
<p>想要分成两行，需要在行尾输入两个空格。<br>我说的对吧~</p>
<p>想要开始一个新的段落，乖乖的按两下回车吧</p>
<p>我说的对吧~</p>
<p><strong>两个星号包围的是粗体</strong></p>
<p><em>一个星号包围的是斜体</em></p>
<blockquote>
<p>引用内容，多行的话，用两个空格结尾吧<br>是吧~</p>
</blockquote>
<p><code>反引号包围的是行内代码</code>，这个按键在「Tab」上边</p>
<p><code>嵌套的话，可以使用`两个双引号`嵌套在外面</code></p>
<figure class="highlight python"><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><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">#三个反引号包围的是代码块。 </span></span><br><span class="line"><span class="comment">#会显示行号。 </span></span><br><span class="line"><span class="comment">#也有高亮显示 </span></span><br><span class="line"><span class="comment">#我上面加了python，你也可以不加。如果不能高亮，那么还是加上吧。。另外，如果你的代码块包围的是html，那你应该写html而不是python</span></span><br><span class="line"><span class="keyword">import</span> os</span><br><span class="line"><span class="keyword">print</span> os.sep</span><br></pre></td></tr></table></figure>
<p>嵌套的话，可以使用六个反引号嵌套在外面。</p>
<ol>
<li>有序列表1，注意点之后的空格。</li>
<li>有序列表2.</li>
<li><p>我这里写成1，在显示时还是3，厉害不。</p>
</li>
<li><p>有序列表1<br>详细内容，注意前面有一个空格</p>
</li>
<li>有序列表2<br>详细内容</li>
</ol>
<ul>
<li>无序列表1</li>
<li>无序列表2</li>
<li>无序列表3<ul>
<li>小1，注意前面有一个空格</li>
<li>小2</li>
</ul>
</li>
</ul>
<p>超级链接：<a href="http://zipperary.com" target="_blank" rel="external">我的博客</a></p>
<p>插入图片：<img src="http://ww2.sinaimg.cn/large/5e8cb366jw1e62o63tkv3j20dh078q5a.jpg" alt="好看不"></p>
<p>另外，markdown完全兼容html，你可以用html插入这些东西，例如：</p>
<iframe height="498" width="510" src="http://player.youku.com/embed/XMjI2MjU3MDMy" frameborder="0" allowfullscreen></iframe>
<p><del>删除线</del></p>
<p>分割线用<code>---</code>，注意单独一样，上面必须是一个空行</p>
<hr>
<p>更多高级的格式，请果断插入html标签</p>
</div>
<div class="article-info article-info-index">
<div class="article-tag tagcloud">
<ul class="article-tag-list"><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/markdown/">markdown</a></li></ul>
</div>
<div class="clearfix"></div>
</div>
</div>
</article>
<article id="post-clearfix" class="article article-type-post" itemscope itemprop="blogPost">
<div class="article-meta">
<a href="/2016/05/08/clearfix/" class="article-date">
<time datetime="2016-05-08T14:09:08.000Z" itemprop="datePublished">2016-05-08</time>
</a>
</div>
<div class="article-inner">
<input type="hidden" class="isFancy" />
<header class="article-header">
<h1 itemprop="name">
<a class="article-title" href="/2016/05/08/clearfix/">清除浮动的八种方法</a>
</h1>
</header>
<div class="article-entry" itemprop="articleBody">
<h2 id="1-父级div定义-height"><a href="#1-父级div定义-height" class="headerlink" title="1. 父级div定义 height"></a>1. 父级div定义 height</h2><h3 id="代码如下"><a href="#代码如下" class="headerlink" title="代码如下:"></a>代码如下:</h3><figure class="highlight html"><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><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag"><<span class="name">style</span> <span class="attr">type</span>=<span class="string">"text/css"</span>></span><span class="undefined"> </span><br><span class="line">.div1{background:#000080;border:1px solid red;/*解决代码*/height:200px;}</span><br><span class="line">.div2{background:#800080;border:1px solid red;height:100px;} </span><br><span class="line">.left{float:left;width:20%;height:200px;background:#DDD} </span><br><span class="line">.right{float:right;width:30%;height:80px;background:#DDD} </span><br><span class="line"></span><span class="tag"></<span class="name">style</span>></span></span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"div1"</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"left"</span>></span>Left<span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"right"</span>></span>Right<span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"></<span class="name">div</span>></span></span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"div2"</span>></span></span><br><span class="line">div2</span><br><span class="line"><span class="tag"></<span class="name">div</span>></span></span><br></pre></td></tr></table></figure>
<style type="text/css">.div1{background:#000080;border:1px solid red;/*解决代码*/height:200px;}.div2{background:#800080;border:1px solid red;height:100px;}.left{float:left;width:20%;height:200px;background:#DDD}.right{float:right;width:30%;height:80px;background:#DDD}</style>
<div class="div1"><div class="left">Left</div><div class="right">Right</div></div><div class="div2">div2</div>
<blockquote>
<p>原理：父级div手动定义height，就解决了父级div无法自动获取到高度的问题。 </p>
<p>优点：简单、代码少、容易掌握 </p>
<p>缺点：只适合高度固定的布局，要给出精确的高度，如果高度和父级div不一样时，会产生问题 </p>
<p>建议：不推荐使用，只建议高度固定的布局时使用</p>
</blockquote>
<p><br><br></p>
<h2 id="2-结尾处加空div标签-clear-both"><a href="#2-结尾处加空div标签-clear-both" class="headerlink" title="2. 结尾处加空div标签 clear:both"></a>2. 结尾处加空div标签 clear:both</h2><h3 id="代码如下-1"><a href="#代码如下-1" class="headerlink" title="代码如下:"></a>代码如下:</h3><figure class="highlight html"><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><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag"><<span class="name">style</span> <span class="attr">type</span>=<span class="string">"text/css"</span>></span><span class="undefined"> </span><br><span class="line">.div1{background:#000080;border:1px solid red} </span><br><span class="line">.div2{background:#800080;border:1px solid red;height:100px;} </span><br><span class="line">.left{float:left;width:20%;height:200px;background:#DDD} </span><br><span class="line">.right{float:right;width:30%;height:80px;background:#DDD} </span><br><span class="line">/*清除浮动代码*/ </span><br><span class="line">.clearfloat{clear:both} </span><br><span class="line"></span><span class="tag"></<span class="name">style</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"div1"</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"left"</span>></span>Left<span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"right"</span>></span>Right<span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"clearfloat"</span>></span><span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"div2"</span>></span> </span><br><span class="line">div2 </span><br><span class="line"><span class="tag"></<span class="name">div</span>></span></span><br></pre></td></tr></table></figure>
<style type="text/css">.div1{background:#000080;border:1px solid red}.div2{background:#800080;border:1px solid red;height:100px;}.left{float:left;width:20%;height:200px;background:#DDD}.right{float:right;width:30%;height:80px;background:#DDD}.clearfloat{clear:both}/*清除浮动代码*/</style>
<div class="div1"><div class="left">Left</div><div class="right">Right</div><div class="clearfloat"></div></div><div class="div2">div2</div>
<blockquote>
<p>原理：添加一个空div，利用css提高的clear:both清除浮动，让父级div能自动获取到高度 </p>
<p>优点：简单、代码少、浏览器支持好、不容易出现怪问题 </p>
<p>缺点：不少初学者不理解原理；如果页面浮动布局多，就要增加很多空div，让人感觉很不好 </p>
<p>建议：不推荐使用，但此方法是以前主要使用的一种清除浮动方法 </p>
</blockquote>
<p><br><br></p>
<h2 id="3-父级div定义-伪类-after-和-zoom"><a href="#3-父级div定义-伪类-after-和-zoom" class="headerlink" title="3. 父级div定义 伪类:after 和 zoom"></a>3. 父级div定义 伪类:after 和 zoom</h2><h3 id="代码如下-2"><a href="#代码如下-2" class="headerlink" title="代码如下:"></a>代码如下:</h3><figure class="highlight html"><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><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag"><<span class="name">style</span> <span class="attr">type</span>=<span class="string">"text/css"</span>></span><span class="undefined"> </span><br><span class="line">.div1{background:#000080;border:1px solid red;} </span><br><span class="line">.div2{background:#800080;border:1px solid red;height:100px;margin-top:10px} </span><br><span class="line">.left{float:left;width:20%;height:200px;background:#DDD} </span><br><span class="line">.right{float:right;width:30%;height:80px;background:#DDD} </span><br><span class="line">/*清除浮动代码*/ </span><br><span class="line">.clearfloat:after{display:block;clear:both;content:"";visibility:hidden;height:0} </span><br><span class="line">.clearfloat{zoom:1} </span><br><span class="line"></span><span class="tag"></<span class="name">style</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"div1 clearfloat"</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"left"</span>></span>Left<span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"right"</span>></span>Right<span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"div2"</span>></span> </span><br><span class="line">div2 </span><br><span class="line"><span class="tag"></<span class="name">div</span>></span></span><br></pre></td></tr></table></figure>
<style type="text/css">.div1{background:#000080;border:1px solid red;}.div2{background:#800080;border:1px solid red;height:100px;margin-top:10px}.left{float:left;width:20%;height:200px;background:#DDD}.right{float:right;width:30%;height:80px;background:#DDD}.clearfloat:after{display:block;clear:both;content:"";visibility:hidden;height:0}.clearfloat{zoom:1}</style>
<div class="div1 clearfloat"><div class="left">Left</div>><div class="right">Right</div></div><br><div class="div2">div2</div>
<blockquote>
<p>原理：IE8以上和非IE浏览器才支持:after，原理和方法2有点类似，zoom(IE转有属性)可解<br> ie6,ie7浮动问题 </p>
<p>优点：浏览器支持好、不容易出现怪问题（目前：大型网站都有使用，如：腾迅，网易，新浪等等） </p>
<p>缺点：代码多、不少初学者不理解原理，要两句代码结合使用才能让主流浏览器都支持。 </p>
<p>建议：推荐使用，建议定义公共类，以减少CSS代码。 </p>
</blockquote>
<p><br><br></p>
<h2 id="4-父级div定义-overflow-hidden-并定义宽度"><a href="#4-父级div定义-overflow-hidden-并定义宽度" class="headerlink" title="4. 父级div定义 overflow:hidden (并定义宽度)"></a>4. 父级div定义 overflow:hidden (并定义宽度)</h2><h3 id="代码如下-3"><a href="#代码如下-3" class="headerlink" title="代码如下:"></a>代码如下:</h3><figure class="highlight html"><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><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag"><<span class="name">style</span> <span class="attr">type</span>=<span class="string">"text/css"</span>></span><span class="undefined"> </span><br><span class="line">.div1{background:#000080;border:1px solid red;/*解决代码*/width:98%;overflow:hidden} </span><br><span class="line">.div2{background:#800080;border:1px solid red;height:100px;width:100%} </span><br><span class="line">.left{float:left;width:20%;height:200px;background:#DDD} </span><br><span class="line">.right{float:right;width:30%;height:80px;background:#DDD} </span><br><span class="line"></span><span class="tag"></<span class="name">style</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"div1"</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"left"</span>></span>Left<span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"right"</span>></span>Right<span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"div2"</span>></span> </span><br><span class="line">div2 </span><br><span class="line"><span class="tag"></<span class="name">div</span>></span></span><br></pre></td></tr></table></figure>
<style type="text/css">.div1{background:#000080;border:1px solid red;/*解决代码*/width:98%;overflow:hidden}.div2{background:#800080;border:1px solid red;height:100px;width:100%}.left{float:left;width:20%;height:200px;background:#DDD}.right{float:right;width:30%;height:80px;background:#DDD}</style>
<div class="div1"><div class="left">Left</div><div class="right">Right</div></div><div class="div2">div2</div>
<blockquote>
<p>原理：必须定义width或zoom:1，同时不能定义height，使用overflow:hidden时，浏览器会自动检查浮动区域的高度 </p>
<p>优点：简单、代码少、浏览器支持好 </p>
<p>缺点：不能和position配合使用，因为超出的尺寸的会被隐藏。 </p>
<p>建议：只推荐没有使用position或对overflow:hidden理解比较深的朋友使用。 </p>
</blockquote>
<p><br><br></p>
<h2 id="5-父级div定义-overflow-auto"><a href="#5-父级div定义-overflow-auto" class="headerlink" title="5. 父级div定义 overflow:auto"></a>5. 父级div定义 overflow:auto</h2><h3 id="代码如下-4"><a href="#代码如下-4" class="headerlink" title="代码如下:"></a>代码如下:</h3><figure class="highlight html"><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><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag"><<span class="name">style</span> <span class="attr">type</span>=<span class="string">"text/css"</span>></span><span class="undefined"> </span><br><span class="line">.div1{background:#000080;border:1px solid red;/*解决代码*/width:98%;overflow:auto} </span><br><span class="line">.div2{background:#800080;border:1px solid red;height:100px;width:98%} </span><br><span class="line">.left{float:left;width:20%;height:200px;background:#DDD} </span><br><span class="line">.right{float:right;width:30%;height:80px;background:#DDD} </span><br><span class="line"></span><span class="tag"></<span class="name">style</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"div1"</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"left"</span>></span>Left<span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"right"</span>></span>Right<span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"div2"</span>></span> </span><br><span class="line">div2 </span><br><span class="line"><span class="tag"></<span class="name">div</span>></span></span><br></pre></td></tr></table></figure>
<style type="text/css">.div1{background:#000080;border:1px solid red;/*解决代码*/width:98%;overflow:auto}.div2{background:#800080;border:1px solid red;height:100px;width:98%}.left{float:left;width:20%;height:200px;background:#DDD}.right{float:right;width:30%;height:80px;background:#DDD}</style>
<div class="div1"><div class="left">Left</div><div class="right">Right</div></div><div class="div2">div2</div>
<blockquote>
<p>原理：必须定义width或zoom:1，同时不能定义height，使用overflow:auto时，浏览器会自动检查浮动区域的高度 </p>
<p>优点：简单、代码少、浏览器支持好 </p>
<p>缺点：内部宽高超过父级div时，会出现滚动条。 </p>
<p>建议：不推荐使用，如果你需要出现滚动条或者确保你的代码不会出现滚动条就使用吧。 </p>
</blockquote>
<p><br><br></p>
<h2 id="6-父级div-也一起浮动"><a href="#6-父级div-也一起浮动" class="headerlink" title="6. 父级div 也一起浮动"></a>6. 父级div 也一起浮动</h2><h3 id="代码如下-5"><a href="#代码如下-5" class="headerlink" title="代码如下:"></a>代码如下:</h3><figure class="highlight html"><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><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag"><<span class="name">style</span> <span class="attr">type</span>=<span class="string">"text/css"</span>></span><span class="undefined"> </span><br><span class="line">.div1{background:#000080;border:1px solid red;/*解决代码*/width:98%;margin-bottom:10px;float:left} </span><br><span class="line">.div2{background:#800080;border:1px solid red;height:100px;width:98%;/*解决代码*/clear:both} </span><br><span class="line">.left{float:left;width:20%;height:200px;background:#DDD} </span><br><span class="line">.right{float:right;width:30%;height:80px;background:#DDD} </span><br><span class="line"></span><span class="tag"></<span class="name">style</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"div1"</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"left"</span>></span>Left<span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"right"</span>></span>Right<span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"div2"</span>></span> </span><br><span class="line">div2 </span><br><span class="line"><span class="tag"></<span class="name">div</span>></span></span><br></pre></td></tr></table></figure>
<style type="text/css">.div1{background:#000080;border:1px solid red;/*解决代码*/width:98%;margin-bottom:10px;float:left}.div2{background:#800080;border:1px solid red;height:100px;width:98%;/*解决代码*/clear:both}.left{float:left;width:20%;height:200px;background:#DDD}.right{float:right;width:30%;height:80px;background:#DDD}</style>
<div class="div1"><div class="left">Left</div><div class="right">Right</div></div><div class="div2">div2</div>
<blockquote>
<p>原理：所有代码一起浮动，就变成了一个整体 </p>
<p>优点：没有优点 ….</p>
<p>缺点：会产生新的浮动问题。 </p>
<p>建议：不推荐使用，只作了解。 </p>
</blockquote>
<p><br><br></p>
<h2 id="7-父级div定义-display-table"><a href="#7-父级div定义-display-table" class="headerlink" title="7. 父级div定义 display:table"></a>7. 父级div定义 display:table</h2><h3 id="代码如下-6"><a href="#代码如下-6" class="headerlink" title="代码如下:"></a>代码如下:</h3><figure class="highlight html"><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><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag"><<span class="name">style</span> <span class="attr">type</span>=<span class="string">"text/css"</span>></span><span class="undefined"> </span><br><span class="line">.div1{background:#000080;border:1px solid red;/*解决代码*/width:98%;display:table;margin-bottom:10px;} </span><br><span class="line">.div2{background:#800080;border:1px solid red;height:100px;width:98%;} </span><br><span class="line">.left{float:left;width:20%;height:200px;background:#DDD} </span><br><span class="line">.right{float:right;width:30%;height:80px;background:#DDD} </span><br><span class="line"></span><span class="tag"></<span class="name">style</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"div1"</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"left"</span>></span>Left<span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"right"</span>></span>Right<span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"div2"</span>></span> </span><br><span class="line">div2 </span><br><span class="line"><span class="tag"></<span class="name">div</span>></span></span><br></pre></td></tr></table></figure>
<style type="text/css">.div1{background:#000080;border:1px solid red;/*解决代码*/width:98%;display:table;margin-bottom:10px;}.div2{background:#800080;border:1px solid red;height:100px;width:98%;}.left{float:left;width:20%;height:200px;background:#DDD}.right{float:right;width:30%;height:80px;background:#DDD}</style>
<div class="div1"><div class="left">Left</div><div class="right">Right</div></div><div class="div2">div2</div>
<blockquote>
<p>原理：将div属性变成表格 </p>
<p>优点：没有优点 </p>
<p>缺点：会产生新的未知问题。 </p>
<p>建议：不推荐使用，只作了解。 </p>
</blockquote>
<p><br><br></p>
<h2 id="8-结尾处加-br标签-clear-both"><a href="#8-结尾处加-br标签-clear-both" class="headerlink" title="8. 结尾处加 br标签 clear:both"></a>8. 结尾处加 br标签 clear:both</h2><h3 id="代码如下-7"><a href="#代码如下-7" class="headerlink" title="代码如下:"></a>代码如下:</h3><figure class="highlight html"><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><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag"><<span class="name">style</span> <span class="attr">type</span>=<span class="string">"text/css"</span>></span><span class="undefined"> </span><br><span class="line">.div1{background:#000080;border:1px solid red;margin-bottom:10px; zoom:1 } </span><br><span class="line">.div2{background:#800080;border:1px solid red;height:100px} </span><br><span class="line">.left{float:left;width:20%;height:200px;background:#DDD} </span><br><span class="line">.right{float:right;width:30%;height:80px;background:#DDD} </span><br><span class="line">.clearfloat{clear:both} </span><br><span class="line"></span><span class="tag"></<span class="name">style</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"div1"</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"left"</span>></span>Left<span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"right"</span>></span>Right<span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">br</span> <span class="attr">class</span>=<span class="string">"clearfloat"</span> /></span> </span><br><span class="line"><span class="tag"></<span class="name">div</span>></span> </span><br><span class="line"><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"div2"</span>></span> </span><br><span class="line">div2 </span><br><span class="line"><span class="tag"></<span class="name">div</span>></span></span><br></pre></td></tr></table></figure>
<style type="text/css">.div1{background:#000080;border:1px solid red;margin-bottom:10px; zoom:1 }.div2{background:#800080;border:1px solid red;height:100px}.left{float:left;width:20%;height:200px;background:#DDD}.right{float:right;width:30%;height:80px;background:#DDD}.clearfloat{clear:both}</style>
<div class="div1"><div class="left">Left</div><div class="right">Right</div><br class="clearfloat"></div><div class="div2">div2</div>
<blockquote>
<p>原理：父级div定义zoom:1来解决IE浮动问题，结尾处加 br标签 clear:both </p>
<p>建议：不推荐使用，只作了解。</p>
</blockquote>
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