<!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>
*{
padding:0;
margin:0;
}
.col:nth-of-type(1) {
float: left;
width: 200px;
height: 300px;
margin-right: 10px;
background-color: red;
}
.col:nth-of-type(2) {
overflow: hidden;/*创建bfc */
height: 300px;
background-color: purple;
}
</style>
</head>
<body>
<!-- <script src="index.js"></script> -->
<div class="col"></div>
<div class="col"></div>
</body>
</html>
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