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圣杯布局的实现方式

news 2025/8/24 5:54:25

1.什么是圣杯布局？

左右盒子固定，中间盒子自适应

2.实现方式

（1）flex布局

思路：左右盒子给固定的宽高，中间盒子flex:1

<!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>
<style>
* {
margin: 0;
padding: 0;
}

.box {
display: flex;
width: 100vw;
height: 100vh;
}

.one {
width: 20vw;
height: 20vh;
background-color: yellowgreen;
}

.two {
flex: 1;
height: 20vh;
background-color: plum;
}

.three {
width: 20vw;
height: 20vh;
background-color: pink;
}

</style>

<body>

<div class="box">
<div class="one">盒子1</div>
<div class="two">盒子2</div>
<div class="three">盒子3</div>
</div>

</body>

</html>

（2）浮动

思路：左盒子左浮，右盒子右浮，中间盒子不动，要注意布局顺序，盒子3在盒子2前面

<!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>
<style>
* {
margin: 0;
padding: 0;
}

.box {
width: 100vw;
height: 100vh;
}

.one {
float: left;
width: 20vw;
height: 20vh;
background-color: yellowgreen;
}

.two {
height: 20vh;
background-color: yellow;
}

.three {
float: right;
width: 20vw;
height: 20vh;
background-color: pink;
}
</style>

<body>

<div class="box">
<div class="one">盒子1</div>
<div class="three">盒子3</div>
<div class="two">盒子2</div>
</div>

</body>

</html>

（3）定位

思路：父级相对定位、左右绝对定位，中间盒子不动

<!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>Document</title>
</head>
<style>
* {
margin: 0;
padding: 0;
}

.box {
position: relative;
width: 100vw;
height: 100vh;
}

.one {
position: absolute;
top: 0;
left: 0;
width: 20vw;
height: 20vh;
background-color: yellowgreen;
}

.two {
height: 20vh;
background-color: plum;
}

.three {
position: absolute;
top: 0;
right: 0;
width: 20vw;
height: 20vh;
background-color: pink;
}
</style>

<body>
<div class="box">
<div class="one">盒子1</div>
<div class="two">盒子2</div>
<div class="three">盒子3</div>
</div>
</body>

</html>