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无法使引导下拉菜单工作[复制]

bootstrap-4

kojow7 · 技术社区 · 6 年前

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">

但是,当我尝试实现一个基本菜单时,标准链接起作用,但是如果我尝试单击 Dropdown link 它似乎什么都没做。如果我点击它,它就会掉下来。

<nav class="navbar navbar-expand-sm bg-dark navbar-dark">

  <ul class="navbar-nav">
              <li class="nav-item"><a href="/">Home</a></li>
              <li class="nav-item"><a href="/link 1">Link 1</a></li>
              <li class="nav-item"><a href="/link 2">Link 2</a></li>
              <li class="nav-item"><a href="/link 3">Link 3</a></li>

    <li class="nav-item dropdown">
      <a class="nav-link dropdown-toggle" href="#" id="navbardrop" data-toggle="dropdown">Dropdown link</a>
      <div class="dropdown-menu">
        <a class="dropdown-item" href="#">link 4</a>
        <a class="dropdown-item" href="#">link 5</a>
        <a class="dropdown-item" href="#">link 6</a>
      </div>
    </li>

  </ul>
</nav>

我做错了什么?为什么菜单没有打开以显示链接4、5和6?

1 回复 | 直到 6 年前

Obsidian Age 6 年前

你只包括了 CSS格式 用于引导。你需要包括 JavaScript语言 引导下拉列表工作。您还需要包含对两个依赖项的引用,jQuery和PopperJS, 之前对Bootstrap的JavaScript的引用:

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>

下面是一个添加了以下内容的工作示例:

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>

<nav class="navbar navbar-expand-sm bg-dark navbar-dark">
  <ul class="navbar-nav">
    <li class="nav-item"><a href="/">Home</a></li>
    <li class="nav-item"><a href="/link 1">Link 1</a></li>
    <li class="nav-item"><a href="/link 2">Link 2</a></li>
    <li class="nav-item"><a href="/link 3">Link 3</a></li>
    <li class="nav-item dropdown">
      <a class="nav-link dropdown-toggle" href="#" id="navbardrop" data-toggle="dropdown">Dropdown link</a>
      <div class="dropdown-menu">
        <a class="dropdown-item" href="#">link 4</a>
        <a class="dropdown-item" href="#">link 5</a>
        <a class="dropdown-item" href="#">link 6</a>
      </div>
    </li>
  </ul>
</nav>