HTML5之高度塌陷问题的解决-爱站

所谓的高度塌陷，意即当给子元素设置浮动时，其父元素高度会丢失的情况。通过实际代码进行演示：

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
main {
width: 100%;
background-color: #ccc;
}
.one {
float: left;
width: 200px;
height: 200px;
background-color: skyblue;
}
.two {
float: right;
width: 200px;
height: 200px;
background-color: tomato;
}
section {
width: 400px;
height: 400px;
background-color: orange;
}
</style>
</head>
<body>
<main>
<div class="one"></div>
<div class="two"></div>
</main>
<section></section>
</body>
</html>