<!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> .container { border: 2px solid #0f0; } .container::after { content: ""; clear: both; display: table; } .child { float: left; height: 100px; width: 100px; background: red; border: 1px solid #000; } </style> </head> <body> <div class="container"> <div class=‘child‘> 1 </div> <div class=‘child‘> 1 </div> <div class=‘child‘> 1 </div> </div> </body> </html>
原文：https://www.cnblogs.com/ycherry/p/12340295.html