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<!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>demo</title>
<style>
html,body{
padding:0;
margin:0;
height: 100%;
color:#fff;
}
.demo{
height: 100%;
display: flex;
flex-direction: column;
}
.head,.foot{
flex:0 1 100px;
background: #000;
}
.content{
flex: 1;
background: red;
}
</style>
</head>
<body>
<div class="demo">
<div class="head">頭部</div>
<div class="content">內(nèi)容</div>
<div class="foot">尾部</div>
</div>
</body>
</html>
運(yùn)行結(jié)果