学习4

浮动-基本使用

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>浮动-基本使用</title>
  <style>
    /* 特点：顶对齐；具备行内块显示模式特点；浮动的盒子会脱标 */
    .one {
      width: 100px;
      height: 100px;
      background-color: brown;

      float: left;
    }

    .two {
      width: 200px;
      height: 200px;
      background-color: orange;

      /* float: left; */

      float: right;
    }
  </style>
</head>
<body>
  <div class="one">one</div>
  <div class="two">two</div>
</body>
</html>

浮动产品布局

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>浮动-产品布局</title>
  <style>
    * {
      margin: 0;
      padding: 0;
    }

    li {
      list-style: none;
    }

    .product {
      margin: 50px auto;
      width: 1226px;
      height: 628px;
      background-color: pink;
    }

    .left {
      float: left;
      width: 234px;
      height: 628px;
      background-color: skyblue;
    }

    .right {
      float: right;
      width: 978px;
      height: 628px;
      background-color: brown;
    }

    .right li {
      float: left;
      margin-right: 14px;
      margin-bottom: 14px;
      width: 234px;
      height: 300px;
      background-color: orange;
    }

    /* 第四个li和第八个li 去掉右侧的margin */
    .right li:nth-child(4n) {
      margin-right: 0;
    }

    /* 细节：如果父级宽度不够，浮动的盒子会掉下来 */
  </style>
</head>
<body>
  <!-- 版心：左右，右面：8个产品 → 8个 li -->
  <div class="product">
    <div class="left"></div>
    <div class="right">
      <ul>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
      </ul>
    </div>
  </div>
</body>
</html>

浮动清除浮动

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>浮动-清除浮动</title>
<style>
  .father {
    margin: 10px auto;
    width: 1200px;
    /* height: 300px; */
    background-color: pink;
  }

  .left {
    float: left;
    width: 200px;
    height: 300px;
    background-color: skyblue;
  }

  .right {
    float: right;
    width: 950px;
    height: 300px;
    background-color: orange;
  }

  .bottom {
    height: 100px;
    background-color: brown;
  }

</style>
</head>
<body>
<div class="father">
  <div class="left"></div>
  <div class="right"></div>
</div>
<div class="bottom"></div>
</body>
</html>

清除浮动-额外标注

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>清除浮动-额外标签法</title>
  <style>
    .father {
      margin: 10px auto;
      width: 1200px;
      /* height: 300px; */
      background-color: pink;
    }

    .left {
      float: left;
      width: 200px;
      height: 300px;
      background-color: skyblue;
    }

    .right {
      float: right;
      width: 950px;
      height: 300px;
      background-color: orange;
    }

    .bottom {
      height: 100px;
      background-color: brown;
    }

    .clearfix {
      clear: both;
    }
  </style>
</head>
<body>
  <div class="father">
    <div class="left"></div>
    <div class="right"></div>
    <div class="clearfix"></div>
  </div>
  <div class="bottom"></div>
</body>
</html>

清除浮动-单伪元素法

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>清除浮动-单伪元素法</title>
  <style>
    .father {
      margin: 10px auto;
      width: 1200px;
      /* height: 300px; */
      background-color: pink;
    }

    .left {
      float: left;
      width: 200px;
      height: 300px;
      background-color: skyblue;
    }

    .right {
      float: right;
      width: 950px;
      height: 300px;
      background-color: orange;
    }

    .bottom {
      height: 100px;
      background-color: brown;
    }

    /* 单伪元素法 */
  .clearfix::after {
    content: "";
    display: block;
    clear: both;
  }
  </style>
</head>
<body>
  <div class="father clearfix">
    <div class="left"></div>
    <div class="right"></div>
  </div>
  <div class="bottom"></div>
</body>
</html>

清除浮动-双伪元素法

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>清除浮动-双伪元素法</title>
  <style>
    .father {
      margin: 10px auto;
      width: 1200px;
      /* height: 300px; */
      background-color: pink;
    }

    .left {
      float: left;
      width: 200px;
      height: 300px;
      background-color: skyblue;
    }

    .right {
      float: right;
      width: 950px;
      height: 300px;
      background-color: orange;
    }

    .bottom {
      height: 100px;
      background-color: brown;
    }

    /* before 解决外边距塌陷问题 */
    /* 双伪元素法 */
    .clearfix::before,
    .clearfix::after {
      content: "";
      display: table;
    }

    /* after 清除浮动 */
    .clearfix::after {
      clear: both;
    }
  </style>
</head>
<body>
  <div class="father clearfix">
    <div class="left"></div>
    <div class="right"></div>
  </div>
  <div class="bottom"></div>
</body>
</html>

清除浮动-overflow

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>清除浮动-overflow</title>
  <style>
    .father {
      margin: 10px auto;
      width: 1200px;
      /* height: 300px; */
      background-color: pink;

      overflow: hidden;
    }

    .left {
      float: left;
      width: 200px;
      height: 300px;
      background-color: skyblue;
    }

    .right {
      float: right;
      width: 950px;
      height: 300px;
      background-color: orange;
    }

    .bottom {
      height: 100px;
      background-color: brown;
    }

  </style>
</head>
<body>
  <div class="father">
    <div class="left"></div>
    <div class="right"></div>
  </div>
  <div class="bottom"></div>
</body>
</html>
posted @ 2025-02-03 12:22  haoyinuo  阅读(24)  评论(0)    收藏  举报