为什么'清楚:左'也清楚吧？

Question

我一直在努力让CSS漂浮起来(在我脑海里).

请注意以下示例:

<style type="text/css">
    div.container {
        width:500px;
    }
    div.left {
        float:left;
        clear:left;
    }
    div.right {
        float:right;
    }
</style>
<div class="container">
    <div class="left">leftdata 1</div>
    <div class="left">leftdata 2</div>
    <div class="right">rightdata 1</div>
    <div class="right">rightdata 2</div>
    <div class="right">rightdata 3</div>
    <div class="right">rightdata 4</div>
</div>

这将给出以下输出:

+--------------------------------------------------------------------+
| leftdata 1                                                         |
| leftdata 2         rightdata 1 rightdata 2 rightdata 3 rightdata 4 |
|                                                                    |
+--------------------------------------------------------------------+

但是我期待这个:

+--------------------------------------------------------------------+
| leftdata 1         rightdata 1 rightdata 2 rightdata 3 rightdata 4 |
| leftdata 2                                                         |
|                                                                    |
+--------------------------------------------------------------------+

为什么清楚:左; 还清算吧？

---

我的目标:

我想只添加一个明确的:对; 标有课程的DIV:对.这应该产生以下结果:

<style type="text/css">
    div.left {float:left;clear:left;}
    div.right {float:right;clear:right;}
</style>

+--------------------------------------------------------------------+
| leftdata 1                                             rightdata 1 |
| leftdata 2                                             rightdata 2 |
|                                                        rightdata 3 |
|                                                        rightdata 4 |
+--------------------------------------------------------------------+

Answer 1

<style type="text/css">
    div.left {float:left;}
    div.right {float:right;}
    br.clear{clear:both;}
</style>

<div class="container">
    <div class="left">
         <div> data 1 </div>
         <div> data 2 </div>
         <div> data 3 </div>
    </div>
    <div class="right">
         <div> right data 1 </div>
         <div> right data 2 </div>
         <div> right data 3 </div>
    </div>
    <br class="clear" />
</div>