Question

我第一次使用bootstrap。我的问题是关于下拉菜单。
单击下拉按钮时，下拉菜单打开。单击一个下拉项后，将关闭下拉菜单。单击窗口中的任意位置也会关闭下拉菜单。

问题是：

我想点击下拉菜单本身时不要关闭下拉菜单，因为我想在其中嵌套另一个下拉菜单。

演示：

<!DOCTYPE html>
<html lang="en">
  <head>
    <!-- Required meta tags always come first -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <meta http-equiv="x-ua-compatible" content="ie=edge">

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.2/css/bootstrap.min.css" integrity="sha384-y3tfxAZXuh4HwSYylfB+J125MxIs6mR5FOHamPBG064zB+AFeWH94NdvaCBm8qnd" crossorigin="anonymous">
  </head>
  <body>
    <div class="dropdown">
    <button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
        Dropdown
    </button>
    <div class="dropdown-menu" aria-labelledby="dropdownMenu1">
        <div class="btn-group">
            <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                Action
            </button>
            <div class="dropdown-menu">
                <a class="dropdown-item" href="#">Action</a>
                <a class="dropdown-item" href="#">Another action</a>
                <a class="dropdown-item" href="#">Something else here</a>
                <a class="dropdown-item" href="#">Separated link</a>
            </div>
        </div>
    </div>
</div>

    <!-- jQuery first, then Bootstrap JS. -->
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.2/js/bootstrap.min.js" integrity="sha384-vZ2WRJMwsjRMW/8U7i6PWi6AlO1L79snBrmgiDpgIWJ82z8eA5lenwvxbMV1PAh7" crossorigin="anonymous"></script>
  </body>
</html>

单击时如何使bootstrap的下拉菜单不会消失？

0 个答案: