要在Bootstrap中堆叠多个进度条，您可以尝试运行以下代码
<!DOCTYPE html> <html> <head> <title>Bootstrap Example</title> <link href = "/bootstrap/css/bootstrap.min.css" rel = "stylesheet"> <script src = "/scripts/jquery.min.js"></script> <script src = "/bootstrap/js/bootstrap.min.js"></script> </head> <body> <div class = "progress"> <div class = "progress-bar progress-bar-success" role = "progressbar" aria-valuenow = "60" aria-valuemin = "0" aria-valuemax = "100" style = "width: 40%;"> <span class = "sr-only">40% Complete (success)</span> </div> <div class = "progress-bar progress-bar-warning" role = "progressbar" aria-valuenow = "60" aria-valuemin = "0" aria-valuemax = "100" style = "width: 30%;"> <span class = "sr-only">30% Complete (warning)</span> </div> <div class = "progress-bar progress-bar-danger" role = "progressbar" aria-valuenow = "60" aria-valuemin = "0" aria-valuemax = "100" style = "width: 20%;"> <span class = "sr-only">20%Complete (danger)</span> </div> </div> </body> </html>