源代码：
左右布局
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>模态框实例</h2> <!-- 按钮：用于打开模态框 --> <button type="button" class="btn btn-primary" data-toggle="modal" data-target="#myModal"> 打开模态框 </button> <!-- 模态框 --> <div class="modal fade" id="myModal"> <div class="modal-dialog"> <div class="modal-content"> <!-- 模态框头部 --> <div class="modal-header"> <h4 class="modal-title">模态框头部</h4> <button type="button" class="close" data-dismiss="modal">×</button> </div> <!-- 模态框主体 --> <div class="modal-body"> 模态框内容.. </div> <!-- 模态框底部 --> <div class="modal-footer"> <button type="button" class="btn btn-secondary" data-dismiss="modal">关闭</button> </div> </div> </div> </div> </div> </body> </html>
运行结果