1、父元素padding+子元素左浮动+margin+相对定位实现（圣杯布局）
<!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>Document</title>
</head>
<body>
<style>
* {
margin: 0;
padding: 0;
}
.container,
.left,
.right {
height: 500px;
}
.container {
padding-left: 100px;
padding-right: 50px;
}
.main {
width: 100%;
height: 500px;
background-color: rebeccapurple;
float: left;
}
.left {
width: 100px;
height: 500px;
background-color: black;
float: left;
margin-left: -100%;
position: relative;
left: -100px;
}
.right {
width: 50px;
height: 500px;
background-color: #abc;
float: left;
margin-left: -50px;
position: relative;
right: -50px;
}
</style>
<div class="container">
<div class="main"></div>
<div class="left"></div>
<div class="right"></div>
</div>
</body>
</html>
缺点：中间盒子同时小于左右两边会破裂
1、中间元素padding+左浮动+margin（圣杯布局不破碎版）
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
</head>
<body>
<style>
* {
padding: 0;
margin: 0;
}
.left {
width: 300px;
height: 300px;
background-color: pink;
float: left;
margin-left: -100%;
}
.right {
width: 200px;
height: 300px;
background-color: skyblue;
float: left;
margin-left: -200px;
}
.container {
width: 100%;
padding-left: 300px;
padding-right: 200px;
box-sizing: border-box;
height: 300px;
background-color: blue;
float: left;
}
</style>
<div class="father">
<div class="container">container</div>
<div class="left">left</div>
<div class="right">right</div>
</div>
</body>
</html>
2、flex+order实现
<!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>Document</title>
</head>
<body>
<style>
* {
margin: 0;
padding: 0;
}
.container,
.left,
.right {
height: 500px;
}
.container {
display: flex;
}
.main {
width: 100%;
height: 500px;
background-color: rebeccapurple;
flex: 1;
order: 2;
}
.left {
width: 100px;
height: 500px;
background-color: black;
order: 1;
}
.right {
width: 50px;
height: 500px;
background-color: #abc;
order: 3;
}
</style>
<div class="container">
<div class="main"></div>
<div class="left"></div>
<div class="right"></div>
</div>
</body>
</html>
3、多加一个盒子（使用padding）+浮动+margin（双飞翼布局）
<!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>Document</title>
</head>
<body>
<style>
* {
margin: 0;
padding: 0;
}
.container,
.left,
.right {
height: 500px;
}
.main {
width: 100%;
height: 500px;
background-color: rebeccapurple;
float: left;
}
.left {
width: 100px;
height: 500px;
background-color: black;
float: left;
margin-left: -100%;
}
.right {
width: 50px;
height: 500px;
background-color: #abc;
float: left;
margin-left: -50px;
}
.insert {
padding: 0 50px 0 100px;
}
</style>
<div class="container">
<div class="main">
<div class="insert">
<div>33</div>
</div>
</div>
<div class="left"></div>
<div class="right"></div>
</div>
</body>
</html>
优点：解决了圣杯破碎问题
缺点：需要多一个盒子包裹，可读性略低
