Bootstrap：选择下拉项时导航链接不会隐藏

Question

以下是我想要实现的目标 - 当选择导航栏中的下拉项时，完成以下两个操作：转到目标 id 的 div将导航栏卷起至初始状态（将其隐藏回完全卷起的状态）事实证明，我只能做到其中之一，但不能同时做到两者。有人可以帮助指导我如何实现这两点吗？我相信第一个下拉项锚点应该做到这一点，但是，由于某种原因，它在卷起导航栏后不会转到 targetId。data-toggle="collapse"仅当我删除和 时，锚点才会带我到达目标data-target=".navbar-collapse.show"，这是第二个锚点显示的内容，但导航栏不会卷起。<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css"><nav class="navbar navbar-dark bg-dark fixed-top">  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarsExampleDefault" aria-controls="navbarsExampleDefault" aria-expanded="false" aria-label="Toggle navigation">      <span class="navbar-toggler-icon"></span>    </button>  <div class="collapse navbar-collapse" id="navbarsExampleDefault">    <ul class="navbar-nav mr-auto">      <li class="nav-item dropdown">        <a class="nav-link dropdown-toggle" href="" id="dropdown01" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Menu</a>        <div class="dropdown-menu shadow rounded" aria-labelledby="dropdown01">          <a class="dropdown-item" href="#targetId" data-toggle="collapse" data-target=".navbar-collapse.show">nav-link does get hidden, but it doesn't hit the target</a>          <a class="dropdown-item" href="#targetId">Hits the target, but the nav-link does not get hidden</a>        </div>      </li>    </ul>  </div></nav><!-- navbar ends here --><div id="targetId">Content</div><script src="https://code.jquery.com/jquery-3.4.1.slim.min.js"></script><script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js"></script><script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>

Answer 1

你可以用Javascript它。

document.querySelectorAll('.custom_collapse').forEach(cur => {

  cur.addEventListener('click', () => {

    document.querySelector('.navbar_collapse').classList.remove('show');

  });

});

#targetId {

    /* JUST FOR SEE TARGET */

    margin-top: 120vh;

}

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css">

<nav class="navbar navbar-dark bg-dark fixed-top">

  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarsExampleDefault" aria-controls="navbarsExampleDefault" aria-expanded="false" aria-label="Toggle navigation">

      <span class="navbar-toggler-icon"></span>

    </button>

  <div class="collapse navbar-collapse navbar_collapse" id="navbarsExampleDefault">

    <ul class="navbar-nav mr-auto">

      <li class="nav-item dropdown">

        <a class="nav-link dropdown-toggle" href="#" id="dropdown01" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Menu</a>

        <div class="dropdown-menu shadow rounded" aria-labelledby="dropdown01">

          <a class="dropdown-item custom_collapse" href="#targetId">nav-link does get hidden, but it doesn't hit the target</a>

          <a class="dropdown-item custom_collapse" href="#targetId">Hits the target, but the nav-link does not get hidden</a>

        </div>

      </li>

    </ul>

  </div>

</nav>

<!-- navbar ends here -->

<div id="targetId">Content</div>

<script src="https://code.jquery.com/jquery-3.4.1.slim.min.js"></script>

<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js"></script>

<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>