如何在垂直导航中单击另一个没有子菜单的链接来关闭 boostrap 5 子菜单

问题描述 投票：0回答：1
navigation bootstrap-5
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投票

您可以在每个顶级链接下方添加空元素，其父元素就像子菜单一样，因此自动隐藏将起作用（显然它需要有内容，空链接不起作用）：

<!DOCTYPE html>
<html lang="en">

<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

  <meta name="viewport" content="width=device-width, initial-scale=1">
  <meta name="description" content="">
  <meta name="author" content="">
  <meta name="generator" content="">
  <title>Navigation Test</title>

  <link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BmbxuPwQa2lc/FVzBcNJ7UAyJxM6wuqIj61tLrc4wSX0szH/Ev+nYRRuWlolflfl" crossorigin="anonymous">
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/font/bootstrap-icons.css">

  <style type="text/css">
    .sidebar li .submenu {
      list-style: none;
      margin: 0;
      padding: 0;
      padding-left: 1rem;
      padding-right: 1rem;
    }
  </style>

  <body>
    <nav class="sidebar card py-2 mb-4">
      <ul class="nav flex-column" id="accordion">
        <li class="nav-item">
          <a class="nav-link" href="#" data-bs-toggle="collapse" data-bs-target="#link1">Link 1</a>
          <span id="link1" data-bs-parent="#accordion"></span>
        </li>
        <li class="nav-item">
          <a class="nav-link" data-bs-toggle="collapse" data-bs-target="#sub_menu_1" href="#">Link 2<i class="bi small bi-caret-down-fill"></i> </a>
          <ul id="sub_menu_1" class="submenu collapse" data-bs-parent="#accordion">
            <li><a class="nav-link" href="#">Item 1</a></li>
            <li><a class="nav-link" href="#">Item 2</a></li>
          </ul>

        </li>
        <li class="nav-item">
          <a class="nav-link" data-bs-toggle="collapse" data-bs-target="#sub_menu_2" href="#">Link 3<i class="bi small bi-caret-down-fill"></i> </a>
          <ul id="sub_menu_2" class="submenu collapse" data-bs-parent="#accordion">
            <li><a class="nav-link" href="#">Item 1</a></li>
            <li><a class="nav-link" href="#">Item 2</a></li>

          </ul>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#" data-bs-toggle="collapse" data-bs-target="#link4">Link 4</a>
          <span id="link4" data-bs-parent="#accordion"></span>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#" data-bs-toggle="collapse" data-bs-target="#link5">Link 5</a>
          <span id="link5" data-bs-parent="#accordion"></span>
        </li>
      </ul>
    </nav>

    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js" integrity="sha384-b5kHyXgcpbZJO/tY9Ul7kGkf1S0CWuKcCD38l8YkeH8z8QjE0GmW1gYU5S9FOnJ0" crossorigin="anonymous"></script>

  </body>

</html>

或者您可以使用 JavaScript 来完成：在顶级链接上添加点击侦听器并使用 JavaScript 关闭打开的菜单：

let links = document.querySelectorAll('.nav-item > .nav-link');

function close(e) {

  const menu = document.querySelector('.submenu.collapse.show');

  if (menu) {
    bootstrap.Collapse.getOrCreateInstance(menu).hide();
  }
}

links.forEach(el => el.addEventListener('click', close));
<!DOCTYPE html>
<html lang="en">

<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

  <meta name="viewport" content="width=device-width, initial-scale=1">
  <meta name="description" content="">
  <meta name="author" content="">
  <meta name="generator" content="">
  <title>Navigation Test</title>

  <link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet">

  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/font/bootstrap-icons.css">

  <style type="text/css">
    .sidebar li .submenu {
      list-style: none;
      margin: 0;
      padding: 0;
      padding-left: 1rem;
      padding-right: 1rem;
    }
  </style>

  <body>
    <nav class="sidebar card py-2 mb-4">
      <ul class="nav flex-column" id="accordion">
        <li class="nav-item">
          <a class="nav-link" href="#">Link 1</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" data-bs-toggle="collapse" data-bs-target="#sub_menu_1" href="#">Link 2<i class="bi small bi-caret-down-fill"></i> </a>
          <ul id="sub_menu_1" class="submenu collapse" data-bs-parent="#accordion">
            <li><a class="nav-link" href="#">Item 1</a></li>
            <li><a class="nav-link" href="#">Item 2</a></li>
          </ul>

        </li>
        <li class="nav-item">
          <a class="nav-link" data-bs-toggle="collapse" data-bs-target="#sub_menu_2" href="#">Link 3<i class="bi small bi-caret-down-fill"></i> </a>
          <ul id="sub_menu_2" class="submenu collapse" data-bs-parent="#accordion">
            <li><a class="nav-link" href="#">Item 1</a></li>
            <li><a class="nav-link" href="#">Item 2</a></li>

          </ul>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#">Link 4</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#">Link 5</a>
        </li>
      </ul>
    </nav>

    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js"></script>


  </body>

</html>

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