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>进度条高度</h2> <p>进度条高度默认为 16px。我们可以使用 CSS 的 height 属性来修改他：</p> <div class="progress" style="height:10px;"> <div class="progress-bar" style="width:40%;"></div> </div> <br> <div class="progress" style="height:20px;"> <div class="progress-bar" style="width:50%;"></div> </div> <br> <div class="progress" style="height:30px;"> <div class="progress-bar" style="width:60%;"></div> </div> </div> </body> </html>
运行结果