|
@@ -0,0 +1,67 @@
|
|
|
|
|
+<!DOCTYPE html>
|
|
|
|
|
+<html lang="en">
|
|
|
|
|
+<head>
|
|
|
|
|
+ <meta charset="UTF-8">
|
|
|
|
|
+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
|
|
|
|
|
+ <title>Document</title>
|
|
|
|
|
+ <style>
|
|
|
|
|
+ #box {
|
|
|
|
|
+ /* height: 800px; */
|
|
|
|
|
+ margin: 0 auto;
|
|
|
|
|
+ /* overflow: hidden; */
|
|
|
|
|
+ /* overflow: auto; */
|
|
|
|
|
+ /* border: 3px solid #000; */
|
|
|
|
|
+ }
|
|
|
|
|
+ #part1 {
|
|
|
|
|
+ width: 200px;
|
|
|
|
|
+ height: 200px;
|
|
|
|
|
+ float: left;
|
|
|
|
|
+ background-color: #f00;
|
|
|
|
|
+ }
|
|
|
|
|
+ #part2 {
|
|
|
|
|
+ width: 230px;
|
|
|
|
|
+ height: 230px;
|
|
|
|
|
+ float: left;
|
|
|
|
|
+ background-color: #ff0;
|
|
|
|
|
+ }
|
|
|
|
|
+ #part3 {
|
|
|
|
|
+ width: 200px;
|
|
|
|
|
+ height: 200px;
|
|
|
|
|
+ float: left;
|
|
|
|
|
+ background-color: #00f;
|
|
|
|
|
+ }
|
|
|
|
|
+ /*
|
|
|
|
|
+ 浮动会导致父元素高度塌陷
|
|
|
|
|
+ 清浮动：
|
|
|
|
|
+ 1.溢出隐藏法
|
|
|
|
|
+ 在高度塌陷的父元素上 添加overflow:hidden/auto;
|
|
|
|
|
+ 2.额外标签法
|
|
|
|
|
+ 在浮动的盒子同级添加一个空盒子
|
|
|
|
|
+ 并给当前盒子 添加属性 clear:both/left/right/none
|
|
|
|
|
+ 3.伪元素清浮动
|
|
|
|
|
+ .clearfix::after {
|
|
|
|
|
+ content: "";
|
|
|
|
|
+ display: block;
|
|
|
|
|
+ clear: both;
|
|
|
|
|
+ }
|
|
|
|
|
+ 将属性名添加到 高度塌陷的父元素中
|
|
|
|
|
+ */
|
|
|
|
|
+ #aa {
|
|
|
|
|
+ clear: both;
|
|
|
|
|
+ }
|
|
|
|
|
+ .clearfix::after {
|
|
|
|
|
+ content: "";
|
|
|
|
|
+ display: block;
|
|
|
|
|
+ clear: both;
|
|
|
|
|
+ }
|
|
|
|
|
+ </style>
|
|
|
|
|
+</head>
|
|
|
|
|
+<body>
|
|
|
|
|
+ <div id="box" class="clearfix">
|
|
|
|
|
+ <div id="part1"></div>
|
|
|
|
|
+ <div id="part2"></div>
|
|
|
|
|
+ <div id="part3"></div>
|
|
|
|
|
+ <!-- <div id="aa"></div> -->
|
|
|
|
|
+ </div>
|
|
|
|
|
+</body>
|
|
|
|
|
+</html>
|
e