源代码 ：
点击运行
<!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/4.3.1/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/1.15.0/umd/popper.min.js"></script> <script src="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script> </head> <body> <div class="container"> <h2>多种颜色的进度条</h2> <p>Bootstrap4 提供了以下几种进度条颜色:</p> <div class="progress"> <div class="progress-bar" style="width:30%"></div> </div> <br> <div class="progress"> <div class="progress-bar bg-success" style="width:40%"></div> </div> <br> <div class="progress"> <div class="progress-bar bg-info" style="width:50%"></div> </div> <br> <div class="progress"> <div class="progress-bar bg-warning" style="width:60%"></div> </div> <br> <div class="progress"> <div class="progress-bar bg-danger" style="width:70%"></div> </div> </div> </body> </html>
运行结果