Bootstrap 4：如何创建一个带有手风琴的下拉菜单？ [英] Bootstrap 4: How to create a dropdown menu with an accordion inside it?

问题描述

我实际上在使自举式手风琴在下拉菜单中工作时遇到一些问题。
我搜索了很多，还在这里找到了一些StackOverflow线程，但是它们已经使用了几年了，具体取决于引导程序3或引导程序2。
在这里像这样： Twitter引导程序：如何使用手风琴创建下拉按钮

I am actually facing some problems to get an bootstrap accordion working inside a dropdown menu. I googled a lot and also find some StackOverflow threads here, but they are several years old and depending on bootstrap 3 or bootstrap 2. Like this one here: Twitter Bootstrap: How to create a dropdown button with an accordion inside it?

任何人都可以在这里帮助我，或者在Bootstrap下拉菜单中找到适用于手风琴的解决方案。

Can anybody help me here or have a solution for a working accordion inside a bootstrap dropdown menu.

  <nav class="navbar navbar-expand-md">
            <ul class="navbar-nav">
                <li class="nav-item mega-dropdown-menu">
                    <a class="nav-link" href="#" id="dropdown01"
                       data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Test</a>
                    <div class="dropdown-menu" aria-labelledby="dropdown01">
                        <nav class="navbar">
                            <ul class="navbar-nav">
                                <li class="nav-item">
                                    <a class="nav-link" data-toggle="collapse" href="#collapseExample" role="button" aria-expanded="false" aria-controls="collapseExample">Accordion</a>
                                    <div id="collapseExample" class="collapse">
                                        <ul class="navbar-nav">
                                            <li class="nav-link">
                                                <a class="nav-link" href="#">
                                                    Accordion Link 1
                                                </a>
                                            </li>
                                            <li class="nav-link">
                                                <a class="nav-link" href="#">
                                                    Accordion Link 2
                                                </a>
                                            </li>
                                        </ul>
                                    </div>
                                </li>
                            </ul>
                        </nav>
                    </div>
                </li>
            </ul>
        </nav>

推荐答案

使Navbar下拉菜单保持打开状态的技巧是使用< form> 标签。因此，如果将手风琴放在< form> 内，它将按需要工作。

The trick to keeping the Navbar dropdown open on click is to use a <form> tag. Therefore if you place the accordion inside a <form> it will work as desired.

  <div class="collapse navbar-collapse" id="navbarContent">
        <ul class="navbar-nav">
            <li class="nav-item dropdown">
                <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                      Dropdown
                    </a>
                <div class="dropdown-menu">
                    <form class="accordion" id="accordionExample">
                        <div>
                            <a class="nav-link" data-toggle="collapse" data-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
                                Item #1
                            </a>
                            <div id="collapseOne" class="collapse px-3 show" data-parent="#accordionExample">
                                Collapse 1 content
                            </div>
                        </div>
                        <div>
                            <a class="nav-link" data-toggle="collapse" data-target="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo">
                                Item #2
                            </a>
                            <div id="collapseTwo" class="collapse px-3" data-parent="#accordionExample">
                                Collapse 2 content...
                            </div>
                        </div>
                        <div>
                            <a class="nav-link" data-toggle="collapse" data-target="#collapseThree" aria-expanded="false" aria-controls="collapseThree">
                                Item #3
                            </a>
                            <div id="collapseThree" class="collapse px-3" data-parent="#accordionExample">
                                Collapse 3 content...
                            </div>
                        </div>
                    </form>
                </div>
            </li>
        </ul>
    </div>

演示： https://www.codeply.com/go/F8iQy0MeLa

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