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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.org/twitter-bootstrap/4.1.0/css/bootstrap.min.css"> <script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script> <script src="https://cdn.staticfile.org/popper.js/1.12.5/umd/popper.min.js"></script> <script src="https://cdn.staticfile.org/twitter-bootstrap/4.1.0/js/bootstrap.min.js"></script> <style> .border { display:inline-block; width:70px; height:70px; margin:6px; } </style> </head> <body> <div class="container"> <h2>边框颜色</h2> <p>Bootstrap4 提供了一些类来设置边框颜色:</p> <span class="border border-primary"></span> <span class="border border-secondary"></span> <span class="border border-success"></span> <span class="border border-danger"></span> <span class="border border-warning"></span> <span class="border border-info"></span> <span class="border border-light"></span> <span class="border border-dark"></span> <span class="border border-white"></span> </div> </body> </html>
运行结果