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CSS实现两栏布局,左边固定,右边自适应的4种方法

2021-3-29 8:00:31

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>