源代码：
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<!DOCTYPE html> <html> <head> <title>Bootstrap 实例</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://cdn.staticfile.net/twitter-bootstrap/4.3.1/css/bootstrap.min.css"> <script src="https://cdn.staticfile.net/jquery/3.2.1/jquery.min.js"></script> <script src="https://cdn.staticfile.net/popper.js/1.15.0/umd/popper.min.js"></script> <script src="https://cdn.staticfile.net/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script> </head> <body> <div class="container mt-3"> <h1>Margin Right 工具</h1> <div class="mr-0 bg-warning">Margin Right 0</div> <div class="mr-1 bg-warning">Margin Right 1</div> <div class="mr-2 bg-warning">Margin Right 2</div> <div class="mr-3 bg-warning">Margin Right 3</div> <div class="mr-4 bg-warning">Margin Right 4</div> <div class="mr-5 bg-warning">Margin Right 5</div> <div class="mr-auto bg-warning" style="width:150px">Margin Right Auto</div> <br> <p>响应式 margin right 工具，重置浏览器大小查看效果。</p> <div class="mr-sm-5 bg-warning">Margin Right on SM screens</div> <div class="mr-md-5 bg-warning">Margin Right on MD screens</div> <div class="mr-lg-5 bg-warning">Margin Right on LG screens</div> <div class="mr-xl-5 bg-warning">Margin Right on XL screens</div> </div> </body> </html>
运行结果：
AI 编程工具