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@@ -0,0 +1,68 @@
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+<!DOCTYPE html>
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+<html lang="en">
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+<head>
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+ <meta charset="UTF-8">
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+ <title>Document</title>
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+ <style>
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+ .main {
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+ /* overflow: auto; */
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+ }
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+ .one,.two,.three {
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+ width: 200px;
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+ height: 200px;
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+ /* display: inline-block; */
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+ }
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+ .one {
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+ float: left;
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+ background: #00f;
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+ color: #fff;
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+ }
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+ .two {
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+ width: 300px;
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+ float: left;
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+ background: #f00;
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+ }
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+ .three {
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+ float: left;
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+ background: #ff0;
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+ }
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+ .four {
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+ clear: right;
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+ }
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+ #clearfix::after {
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+ content: "";
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+ display: block;
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+ clear: both;
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+ }
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+ </style>
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+</head>
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+<body>
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+ <!--
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+ 清浮动方法：
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+ 1.溢出隐藏法：
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+ 在浮动的父级盒子上添加overflow:hidden(隐藏)||auto(自适应)
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+ 2.额外标签法
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+ 在浮动的同级创建一个空标签，并添加属性clear:both|left|right|none
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+ 3.伪元素清浮动
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+ .clearfix::after {
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+ content: "";
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+ display: block;
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+ clear: both;
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+ }
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+ 将属性名添加到浮动的父级盒子上
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+
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+ 特殊符号
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+ 半格
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+ < 小于号
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+ > 大于号
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+ ® 商标
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+ -->
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+ <div class="main" id="clearfix">
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+ <div class="one">®</div>
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+ <div class="two"></div>
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+ <div class="three"></div>
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+ <!-- <div class="four"></div> -->
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+ </div>
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+</body>
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+</html>
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