This article introduces to you how HTML5 solves the margin-top collapse problem (with code). It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.
<!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> .box{ width: 400px; height: 400px; background-color: red; /* 解决margin-top塌陷问题 */ /* 1.设置border padding */ /* border: 1px solid green; */ /* padding: 1px; */ /* 2.设置overflow */ overflow: hidden; } /* 3.通过伪类 实际开发使用 */ .clearfix:before{ content: ""; display: table; } .box1{ width: 100px; height: 100px; background-color: green; margin-top: 50px; } </style> </head> <body> <p class="box clearfix"> <p class="box1"></p> </p> </body> </html>
The running effect is as follows:
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