CSS深刻理解之float（HTML/CSS）

时间 2019-12-05

标签 css 深刻理解 float html 栏目 CSS 繁體版

原文原文链接

float的设计初衷仅仅是：为了文字环绕效果html

float的包裹与破坏ide

包裹：收缩、坚挺、隔绝（BFC）spa

破坏：父元素高度塌陷设计

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>Layout</title>
    <style>
      .box{
          border: 1px solid red;
          width: 300px;
          margin: 20px auto;
      }
      .left{
          float: left;
          height: 100px;
          width: 50px;
          border: 1px solid black;
      }
      .right{
          float: right;
          height: 100px;
          width: 50px;
          border: 1px solid green;
      }
    </style>
  </head>
  <body>
    <div class="box">
        <div class="left"></div>
        <div class="right"></div>
    </div>
  </body>
</html>

View Code

如何下降float破坏性的影响（清除浮动）？code

一、底部插入clear:both;htm

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>Layout</title>
    <style>
      .box {
        border: 1px solid red;
        width: 300px;
        margin: 20px auto;
      }
      .clearfix {
        clear: both;
      }
      .left {
        float: left;
        height: 100px;
        width: 50px;
        border: 1px solid black;
      }
      .right {
        float: right;
        height: 100px;
        width: 50px;
        border: 1px solid green;
      }
    </style>
  </head>
  <body>
    <div class="box">
      <div class="left"></div>
      <div class="right"></div>
      <div class="clearfix"></div>
    </div>
  </body>
</html>

View Code

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>Layout</title>
    <style>
      .box {
        border: 1px solid red;
        width: 300px;
        margin: 20px auto;
      }
      .box:after {
        content: '';
        display: block;
        height: 0;
        overflow: hidden;
        clear: both;
      }
      .left {
        float: left;
        height: 100px;
        width: 50px;
        border: 1px solid black;
      }
      .right {
        float: right;
        height: 100px;
        width: 50px;
        border: 1px solid green;
      }
    </style>
  </head>
  <body>
    <div class="box">
      <div class="left"></div>
      <div class="right"></div>
    </div>
  </body>
</html>

View Code

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>Layout</title>
    <style>
      .box {
        border: 1px solid red;
        width: 300px;
        margin: 20px auto;
      }
      .box:after {
        content: '';
        display: table;
        clear: both;
      }
      .left {
        float: left;
        height: 100px;
        width: 50px;
        border: 1px solid black;
      }
      .right {
        float: right;
        height: 100px;
        width: 50px;
        border: 1px solid green;
      }
    </style>
  </head>
  <body>
    <div class="box">
      <div class="left"></div>
      <div class="right"></div>
    </div>
  </body>
</html>

View Code

二、父元素BFC/haslayoutblog

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>Layout</title>
    <style>
      .box {
        border: 1px solid red;
        width: 300px;
        margin: 20px auto;
        overflow: hidden;
      }
      .left {
        float: left;
        height: 100px;
        width: 50px;
        border: 1px solid black;
      }
      .right {
        float: right;
        height: 100px;
        width: 50px;
        border: 1px solid green;
      }
    </style>
  </head>
  <body>
    <div class="box">
      <div class="left"></div>
      <div class="right"></div>
    </div>
  </body>
</html>

View Code

float的特性utf-8

一、元素block块状化（砖头化）；it

二、破坏性形成的紧密排列特性（去空格化）。event

1. 深刻理解css之float
2. css float的深刻研究
3. 深刻理解css之BFC
4. CSS深刻理解之overflow
5. 深刻解析 float
6. CSS深刻理解之absolute（HTML/CSS）
7. CSS深刻理解之overflow（HTML/CSS）
8. css 深刻理解
9. CSS中Position、Float属性深刻探讨
10. CSS深刻理解之vertical-align
更多相关文章...
• jQuery Mobile CSS 类 - jQuery Mobile 教程
• CSS 指南 - 网站建设指南
• 算法总结-深度优先算法
• Docker 清理命令