CSS实现两栏布局，左边固定，右边自适应的4种方法

2020-03-10 16:32:30 三木成森_yyy

1. float+overflow:hidden

这种办法主要通过 overflow 触发 BFC,而 BFC 不会重叠浮动元素。由于设置 overflow:hidden 并不会触发 IE6-浏览器的 haslayout 属性，所以需要设置 zoom:1 来兼容 IE6-浏览器。具体代码如下：

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <style>
    .parent {
      margin: 0 auto; // 使父容器水平居中显示
      overflow: hidden;
      zoom: 1;
      max-width: 1000px;
    }
    .left {
      float: left;
      margin-right: 20px;
      width: 200px;
      background-color: green;
    }

    .right {
      overflow: hidden;
      zoom: 1;
      background-color: yellow;
    }
  </style>
</head>
<body>
  <div class="parent"> 
    <div class="left"> 
    <p>left left left left</p> 
    </div> 
    <div class="right"> 
    <p>right</p> 
    <p>right</p> 
    </div> 
  </div> 
</body>
</html>

2. float: left+ margin-left

float使左边的元素脱离文档流，右边的元素可以和左边的元素显示在同一行，设置margin-left让右边的元素不覆盖掉左边的元素，代码如下：

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <style>
    .parent {
      margin: 0 auto;
      max-width: 1000px;
    }
    .parent::after {
      content: '';
      display: table;
      clear: both;
    }
    .left {
      float: left;
      width: 200px;
      background-color: green;
    }

    .right {
      margin-left: 200px;
      background-color: yellow;
    }
  </style>
</head>
<body>
  <div class="parent"> 
    <div class="left"> 
    <p>left left left left</p> 
    </div> 
    <div class="right"> 
    <p>right</p> 
    <p>right</p>
    <p>right</p> 
    </div> 
   </div> 
</body>
</html>

3. position: absolute + margin-left

左边绝对定位，右边设置margin-left，代码如下：

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <style>
    .parent {
      position: relative;
      margin: 0 auto;
      max-width: 1000px;
    }

    .left {
      position: absolute;
      width: 200px;
      background-color: green;
    }

    .right {
      margin-left: 200px;
      background-color: yellow;
    }
  </style>
</head>
<body>
  <div class="parent"> 
    <div class="left"> 
    <p>left left left left</p> 
    </div> 
    <div class="right"> 
    <p>right</p> 
    <p>right</p>
    <p>right</p> 
    </div> 
   </div> 
</body>
</html>

4. flex布局

flex布局可以使两个子元素显示在同一行，只要左边的宽度固定，就可以实现效果，代码如下：

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <style>
    .parent {
      display: flex;
      margin: 0 auto;
      max-width: 1000px;
    }
    .left {
      width: 200px;
      background-color: green;
    }

    .right {
      margin-left: 20px;
      flex: 1;
      background-color: yellow;
    }
  </style>
</head>

<body>
  <div class="parent">
    <div class="left">
      <p>left left left left</p>
    </div>
    <div class="right">
      <p>right</p>
      <p>right</p>
      <p>right</p>
    </div>
  </div>
</body>
</html>

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