第一行和第四行要记住
代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> <link rel="stylesheet" href="./bootstrap-3.4.1-dist/css/bootstrap.min.css"> <style> .container div { height: 50px; background-color: yellowgreen; } </style> </head> <body> <div class="container"> <div class="col-lg-3 col-md-6">1</div> <div class="col-lg-3 col-md-6">2</div> <div class="col-lg-3 col-md-6">3</div> <div class="col-lg-3 col-md-6">4</div> </div> </body> </html>
注意
<link rel="stylesheet" href="./bootstrap-3.4.1-dist/css/bootstrap.min.css">
注意不要引入错误
