CSS 的overflow:hidden 属性详细解释

overflow:hidden这个CSS样式是大家常用到的CSS样式，但是大多数人对这个样式的理解仅仅局限于隐藏溢出，而其实它还有清除浮动这个功能。

<span style="color: #008080;"> 1</span> <span style="color: #0000ff;"><span style="color: #800000;">html</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 2</span> <span style="color: #0000ff;"><span style="color: #800000;">head</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 3</span>     <span style="color: #0000ff;"><span style="color: #800000;">meta </span><span style="color: #ff0000;">http-equiv</span><span style="color: #0000ff;">="Content-type"</span><span style="color: #ff0000;"> content</span><span style="color: #0000ff;">="text/html"</span><span style="color: #ff0000;"> charset</span><span style="color: #0000ff;">="utf-8"</span> <span style="color: #0000ff;">/></span>
<span style="color: #008080;"> 4</span>     <span style="color: #0000ff;"><span style="color: #800000;">title</span><span style="color: #0000ff;">></span>taobao demo<span style="color: #0000ff;"></span><span style="color: #800000;">title</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 5</span>     <span style="color: #0000ff;"><span style="color: #800000;">style </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="text/css"</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 6</span> <span style="background-color: #f5f5f5; color: #800000;">     body</span><span style="background-color: #f5f5f5; color: #000000;">{</span><span style="background-color: #f5f5f5; color: #ff0000;">font</span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">12px/1.5 tahoma,arial,sans-serif</span><span style="background-color: #f5f5f5; color: #000000;">}</span>    
<span style="color: #008080;"> 7</span> <span style="background-color: #f5f5f5; color: #800000;">     a</span><span style="background-color: #f5f5f5; color: #000000;">{</span><span style="background-color: #f5f5f5; color: #ff0000;">text-decoration</span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;"> none</span><span style="background-color: #f5f5f5; color: #000000;">;</span><span style="background-color: #f5f5f5; color: #000000;">}</span>
<span style="color: #008080;"> 8</span> <span style="background-color: #f5f5f5; color: #800000;">     .search-tips</span><span style="background-color: #f5f5f5; color: #000000;">{</span><span style="background-color: #f5f5f5; color: #ff0000;">float</span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;"> right</span><span style="background-color: #f5f5f5; color: #000000;">;</span><span style="background-color: #f5f5f5; color: #000000;">}</span>
<span style="color: #008080;"> 9</span> <span style="background-color: #f5f5f5; color: #800000;">     .search-tips a</span><span style="background-color: #f5f5f5; color: #000000;">{</span><span style="background-color: #f5f5f5; color: #ff0000;">color</span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;"> #6c6c6c</span><span style="background-color: #f5f5f5; color: #000000;">;</span><span style="background-color: #f5f5f5; color: #000000;">}</span>
<span style="color: #008080;">10</span> <span style="background-color: #f5f5f5; color: #800000;">     .search-button</span><span style="background-color: #f5f5f5; color: #000000;">{</span><span style="background-color: #f5f5f5; color: #ff0000;">float</span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">right</span><span style="background-color: #f5f5f5; color: #000000;">;</span><span style="background-color: #f5f5f5; color: #000000;">}</span>
<span style="color: #008080;">11</span> <span style="background-color: #f5f5f5; color: #800000;">     .btn-search</span><span style="background-color: #f5f5f5; color: #000000;">{</span><span style="background-color: #f5f5f5; color: #ff0000;">width</span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">149px</span><span style="background-color: #f5f5f5; color: #000000;">;</span><span style="background-color: #f5f5f5; color: #ff0000;">height</span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">44px</span><span style="background-color: #f5f5f5; color: #000000;">;</span><span style="background-color: #f5f5f5; color: #ff0000;">border</span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;"> 0</span><span style="background-color: #f5f5f5; color: #000000;">;</span><span style="background-color: #f5f5f5; color: #ff0000;">cursor</span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;"> pointer</span><span style="background-color: #f5f5f5; color: #000000;">;</span><span style="background-color: #f5f5f5; color: #000000;">}</span>
<span style="color: #008080;">12</span> <span style="background-color: #f5f5f5; color: #800000;">     .search-common-pannel</span><span style="background-color: #f5f5f5; color: #000000;">{</span>
<span style="color: #008080;">13</span> <span style="background-color: #f5f5f5; color: #ff0000;">         height</span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;"> 44px</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">14</span> <span style="background-color: #ccffff;"><span style="color: #ff0000;">        <!--overflow</span><span style="color: #000000;">:</span><span style="color: #0000ff;"> hidden</span><span style="color: #000000;">;</span><span style="color: #ff0000;">--><br>           padding: 3px 0px 3px 0px; //设置边框距离
</span></span><span style="color: #008080;">15</span>         <span style="background-color: #f5f5f5; color: #000000;">}</span>
<span style="color: #008080;">16</span> <span style="background-color: #f5f5f5; color: #800000;">     .search-common-pannel input</span><span style="background-color: #f5f5f5; color: #000000;">{</span>
<span style="color: #008080;">17</span> <span style="background-color: #f5f5f5; color: #ff0000;">         height</span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;"> 44px</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">18</span> <span style="background-color: #f5f5f5; color: #ff0000;">         line-height</span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;"> 44px</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">19</span> <span style="background-color: #f5f5f5; color: #ff0000;">         width</span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;"> 100%</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">20</span> <span style="background-color: #f5f5f5; color: #ff0000;">         border</span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;">0</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">21</span> <span style="background-color: #f5f5f5; color: #ff0000;">         outline</span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;"> 0</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">22</span> <span style="background-color: #f5f5f5; color: #ff0000;">         background-color</span><span style="background-color: #f5f5f5; color: #000000;">:</span><span style="background-color: #f5f5f5; color: #0000ff;"> #fff</span><span style="background-color: #f5f5f5; color: #000000;">;</span>
<span style="color: #008080;">23</span>      <span style="background-color: #f5f5f5; color: #000000;">}</span> 
<span style="color: #008080;">24</span>     <span style="color: #0000ff;"></span><span style="color: #800000;">style</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">25</span> <span style="color: #0000ff;"></span><span style="color: #800000;">head</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">26</span> <span style="color: #0000ff;"><span style="color: #800000;">body</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">27</span>     <span style="color: #0000ff;"><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="search-container"</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">28</span>         <span style="color: #0000ff;"><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="search-pannel"</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">29</span>             <span style="color: #0000ff;"><span style="color: #800000;">form</span><span style="color: #0000ff;">></span>                
<span style="color: #008080;">30</span>                 <span style="color: #0000ff;"><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="search-button"</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">31</span>                   <span style="color: #0000ff;"><span style="color: #800000;">button </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="btn-search"</span><span style="color: #ff0000;"> type</span><span style="color: #0000ff;">="submit"</span><span style="color: #0000ff;">></span><span style="color: #800000;">button</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">32</span>                 <span style="color: #0000ff;"></span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">33</span>                 <span style="color: #0000ff;"><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="search-common-pannel"</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">34</span>                    <span style="color: #0000ff;"><span style="color: #800000;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="text"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">=""</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">35</span>                    <span style="color: #0000ff;"><span style="color: #800000;">i</span><span style="color: #0000ff;">></span><span style="color: #800000;">i</span><span style="color: #0000ff;">></span>     
<span style="color: #008080;">36</span>                 <span style="color: #0000ff;"></span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>    
<span style="color: #008080;">37</span>             <span style="color: #0000ff;"></span><span style="color: #800000;">form</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">38</span>         <span style="color: #0000ff;"></span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">39</span>     <span style="color: #0000ff;"></span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">40</span> <span style="color: #0000ff;"></span><span style="color: #800000;">body</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">41</span> <span style="color: #0000ff;"></span><span style="color: #800000;">html</span><span style="color: #0000ff;">></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>

这段代码是一个做淘宝搜索框中的一段代码，这里overflow：hidden就起到了一个清除浮动的效果。 具体代码可以看慕课网http://www.imooc.com/video/282里的教程