html5 – 为什么用？

我会让自己适应 52framework.com所提供的. (HTML5,CSS3,JS框架)
尽管观看了网格教程视频并检查了其他 demo源代码,但我无法理解为什么使用框架< div class =“clear”>< / div><！ - clear - >代码在第12行.

以下代码的地址是：http://demo.52framework.com/demos/framework/grid.html

<body>
<div class="row">
<header>        
        <div class="logo col_7 col">52framework</div><!-- logo col_7 -->        
            <nav class="col_9 col">
          <ul>
                <li><a href="#navigation">navigation 1</a></li>
                <li><a href="#navigation">navigation 2</a></li>
                <li class="last"><a href="http://www.enavu.com">enavu network</a></li>
              </ul>
            </nav><!-- nav col_9 -->
        <div class="clear"></div><!-- clear -->
    </header>
</div><!-- row -->
...

以下代码也来自同一来源,但如您所见< div class =“clear”>< / div><！ - clear - >尽管这里已经完成了更多的分区,但这里没有使用这段代码.

<!-- this section shows off the grid and how it can be used -->
<section class="row" id="grid">
    <h2>Grid Framework</h2>
    <div class="col col_8">
        col_8
        <div class="row">
            <div class="col col_1">col_1</div>
            <div class="col col_7">col_7
                <div class="row">
                    <div class="col col_3">col_3</div>
                    <div class="col col_4">col_4</div>
                </div><!-- row -->
            </div>
        </div><!-- row -->
    </div><!-- col_8 -->
  <div class="col col_8">
        col_8
        <div class="row">
            <div class="col col_4">4</div>
            <div class="col col_4">4</div>
        </div><!-- row -->
    </div><!-- col_8 -->
  <div class="col_16 col" style="margin-top:15px;">
        <div class="row">
            <div class="col col_9">col_9</div>
            <div class="col col_7">col_7</div>
        </div><!-- row -->
    </div><!-- col_16 -->
  <div class="col_16 col">
        <a href="http://www.52framework.com/documentation/" class="documentation">Grid Framework Documentation</a>
    </div><!-- col_16 -->
</section><!-- row -->

相关的CSS代码：

.clear { clear:both; display:block; overflow:hidden; visibility:hidden; height:0px;}

.col {
    margin-left:10px; margin-right:10px;
    display: inline;
    overflow: hidden;
    float: left;
    position: relative;
}

.row{
    width: 960px;
    margin: 0 auto;
    overflow: hidden;
}
.row .row {
    margin: 0 -10px;
    width: auto;
    display: inline-block;
}

/* Column widths,and element width based on grid */

.col_1,.width_1     {  width:40px;  }
.col_2,.width_2     {  width:100px; }
.col_3,.width_3     {  width:160px; }
.col_4,.width_4     {  width:220px; }
.col_5,.width_5     {  width:280px; }
.col_6,.width_6     {  width:340px; }
.col_7,.width_7     {  width:400px; }
.col_8,.width_8     {  width:460px; }
.col_9,.width_9     {  width:520px; }
.col_10,.width_10   {  width:580px; }
.col_11,.width_11   {  width:640px; }
.col_12,.width_12   {  width:700px; }
.col_13,.width_13   {  width:760px; }
.col_14,.width_14   {  width:820px; }
.col_15,.width_15   {  width:880px; }
.col_16,.width_16   {  width:940px; }

解决方法

这是一种用于 clear the float property导航通过其.col类获得的方法.如果没有这个,你的nav元素后面的内容可能会出现在你的nav元素旁边而不是它下面.

如需进一步阅读,请参阅Chris Coyier的The How and Why of Clearing Floats.

html5 – 为什么用？

解决方法

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