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什么是clearfix？

王林

发布： 2023-08-26 19:53:12

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什么是clearfix？

The clearfix, as the name suggests, is used to clear floats. It is generally used in float layouts. The clearfix is considered a hack to clear floats.

Overflow Issue

Example

的中文翻译为：

示例

Let us see the problem first before moving towards the solution. We have an image here, floated to the right. It overflows outside its container since it is way taller than the element belonging to it −

<!DOCTYPE html>
<html>
<head>
   <style>
      div {
         border: 2px solid blue;
         padding: 5px;
      }
      .myimg {
         float: right;
      }
   </style>
</head>
<body>
   <h2>Demo Heading</h2>
   <p>We haven't used clearfix below:</p>
   <div>
      @@##@@
      Etiam accumsan metus sapien, rutrum sagittis nunc posuere eu. Ut facilisis tortor eget justo
      scelerisque, quis porta nisl sagittis.
   </div>
</body>
</html>

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The output displays the overflow issue −

使用overflow auto修复清除浮动问题

Example

的中文翻译为：

示例

Let us now fix the issue with clearfix −

<!DOCTYPE html>
<html>
<head>
   <style>
      div {
         border: 2px solid blue;
         padding: 5px;
      }
      .myimg {
         float: right;
      }
      .clearfix {
         overflow: auto;
      }
   </style>
</head>
<body>
   <h2 style="clear:right">Demo Heading</h2>
   <p>We have used clearfix below:</p>
   <div class="clearfix">
      @@##@@
      Etiam accumsan metus sapien, rutrum sagittis nunc posuere eu. Ut facilisis tortor eget justo
      scelerisque, quis porta nisl sagittis.
   </div>
</body>
</html>

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使用::after选择器修复清除浮动

Example

的中文翻译为：

示例

The ::after选择器在这里用于修复clearfix −

<!DOCTYPE html>
<html>
<head>
   <style>
      div {
         border: 2px solid blue;
         padding: 5px;
      }
      .myimg {
         float: right;
      }
      .clearfix::after {
         content: "";
         clear: both;
         display: table;
      }
   </style>
</head>
<body>
   <h2 style="clear:right">Demo Heading</h2>
   <p>We have used clearfix below:</p>
   <div class="clearfix">
      @@##@@
      Etiam accumsan metus sapien, rutrum sagittis nunc posuere eu. Ut facilisis tortor eget justo
      scelerisque, quis porta nisl sagittis.
   </div>
</body>
</html>

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