flex
<!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>
body {
margin: 0px;
padding: 0px;
height: 100vh;
display: flex;
flex-direction: column;
}
.top,
.bottom {
height: 100px;
background-color: red;
}
.center {
background-color: pink;
flex: 1;
}
</style>
</head>
<body>
<div class="top"></div>
<div class="center"></div>
<div class="bottom"></div>
</body>
</html>
绝对定位
<!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>
html,
body {
margin: 0px;
padding: 0px;
height: 100vh;
position: relative;
overflow: hidden;
}
.top,
.bottom {
height: 100px;
background-color: red;
}
.top {
position: absolute;
left: 0;
top: 0;
width: 100%;
}
.bottom {
position: absolute;
left: 0;
bottom: 0;
width: 100%;
}
.center {
box-sizing: border-box;
width: 100%;
height: 100%;
padding: 100px 0;
}
.content {
height: 100%;
background-color: blue;
width: 100%;
}
</style>
</head>
<body>
<div class="top"></div>
<div class="center">
<div class="content"></div>
</div>
<div class="bottom"></div>
</body>
</html>
grid
<!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>
html,
body {
margin: 0px;
padding: 0px;
height: 100vh;
overflow: hidden;
display: grid;
grid-template-rows: 100px auto 100px;
}
.top,
.bottom {
background-color: rgba(255, 0, 0, 0.5);
}
.center {
background-color: blue;
}
</style>
</head>
<body>
<div class="top"></div>
<div class="center"></div>
<div class="bottom"></div>
</body>
</html>
