<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>测试</title>
<style>
html,
body {
height: 100%;
margin: 0;
overflow: hidden;
}
.container {
height: calc(100% - 30px);
width: calc(100% - 30px);
margin: 15px;
border: 1px solid red;
overflow: auto;
}
</style>
</head>
<body>
<div class="container">
1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>1<br>
</div>
</body>
</html>
标签：body,100%,height,撑满,div,calc,30px From： https://www.cnblogs.com/kgdxpr/p/17753780.html