CSS实现两栏布局，左边固定，右边自适应的4种方
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1. float+overflow:hidden
这种办法主要通过 overflow 触发 BFC,而 BFC 不会重叠浮动元素。由于设置 overflow:hidden 并不会触发 IE6-浏览器的 haslayout 属性，所以需要设置 zoom:1 来兼容 IE6-浏览器。具体代码如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.parent {
margin: 0 auto; // 使父容器水平居中显示
overflow: hidden;
zoom: 1;
max-width: 1000px;
}
.left {
float: left;
margin-right: 20px;
width: 200px;
background-color: green;
}
.right {
overflow: hidden;
zoom: 1;
background-color: yellow;
}
</style>
</head>
<body>
<div class="parent">
<div class="left">
<p>left left left left</p>
</div>
<div class="right">
<p>right</p>
<p>right</p>
</div>
</div>
</body>
</html>
2. float: left+ margin-left
float使左边的元素脱离文档流，右边的元素可以和左边的元素显示在同一行，设置margin-left让右边的元素不覆盖掉左边的元素， 代码如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.parent {
margin: 0 auto;
max-width: 1000px;
}
.parent::after {
content: '';
display: table;
clear: both;
}
.left {
float: left;
width: 200px;
background-color: green;
}
.right {
margin-left: 200px;
background-color: yellow;
}
</style>
</head>
<body>
<div class="parent">
<div class="left">
<p>left left left left</p>
</div>
<div class="right">
<p>right</p>
<p>right</p>
<p>right</p>
</div>
</div>
</body>
</html>
3. position: absolute + margin-left
左边绝对定位，右边设置margin-left，代码如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.parent {
position: relative;
margin: 0 auto;
max-width: 1000px;
}
.left {
position: absolute;
width: 200px;
background-color: green;
}
.right {
margin-left: 200px;
background-color: yellow;
}
</style>
</head>
<body>
<div class="parent">
<div class="left">
<p>left left left left</p>
</div>
<div class="right">
<p>right</p>
<p>right</p>
<p>right</p>
</div>
</div>
</body>
</html>
4. flex布局
flex布局可以使两个子元素显示在同一行，只要左边的宽度固定，就可以实现效果， 代码如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.parent {
display: flex;
margin: 0 auto;
max-width: 1000px;
}
.left {
width: 200px;
background-color: green;
}
.right {
margin-left: 20px;
flex: 1;
background-color: yellow;
}
</style>
</head>
<body>
<div class="parent">
<div class="left">
<p>left left left left</p>
</div>
<div class="right">
<p>right</p>
<p>right</p>
<p>right</p>
</div>
</div>
</body>
</html>
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