The height issue of floating elements
1. In the standard flow, the height of the content can support the height of the parent element.
2. In the floating flow, floating elements cannot support the height of the parent element.
(Recommended tutorial: html tutorial)
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>D129_FloatExcriseXia</title>
<style>
.fuyuansu,.fuyuansu1{
border:2px black solid;
}
.biaozhun{
width:100px;
height: 100px;
background-color: red;
}
.fudong{
width:100px;
height: 100px;
background-color: yellow;
float:left;
}
</style>
</head>
<body>
<div>
<div></div>
</div>
<hr>
<div>
<div></div>
</div>
</body>
</html>The result is as shown:
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