<!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>Document</title>
<style>
*{
margin: 0;
padding: 0;
}
.app {
clear: both;
}
.left {
background: #eee;
padding: 20px;
overflow: hidden;
height: 300px;
word-break: break-all;
}
/* float: left 改为left就可以变成左固定,右自适应*/
.right{
float: right;
background: blue;
width: 300px;
height: 300px;
padding: 20px;
word-break: break-all;
}
.q {
width: 100%;
height: 20px;
background: red;
margin-top: 50px;
}
</style>
</head>
<body>
<div class="app">
<div class="right">
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<div class="q">宽度100%</div>
</div>
<div class="left">
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<div class="q">宽度100%</div>
</div>
</div>
</body>
</html>
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