请确保您的ID

Question

我想做的是使导航栏在较小的屏幕上折叠，并在单击按钮时使其展开。但是当我单击按钮时，什么也没发生，我也不知道为什么。

<nav class="navbar navbar-expand-lg navbar-light" style="background-color: #FFFFFF;">
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarToggleExternalContent" aria-controls="navbarToggleExternalContent" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
  </button>
  <div class="collapse navbar-collapse justify-content-center" id="navbarNavDropdown">
    <a class="navbar-brand" href="index.html">
      <img src="images\logo1.png" width="200" height="80" class="d-inline-block align-top" alt="">
    </a>
    <ul class="navbar-nav">
      <li class="nav-item active">
        <a class="nav-link" href="index.html">Home <span class="sr-only">(current)</span></a>
      </li>
      <li class="navbar-nav dropdown">
        <a class="nav-link dropdown-toggle" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
          Behandelingen
        </a>
        <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
          <a class="dropdown-item" href="sportmassage.html">Sportmassage</a>
          <a class="dropdown-item" href="massagetherapie.html">Massagetherapie</a>
          <a class="dropdown-item" href="ontspanningsmassage.html">Ontspanningsmassage</a>
        </div>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="tarieven.html">Tarieven</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="contact.html">Contact</a>
      </li>
    </ul>
  </div>
</nav>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>

Answer 1

您的问题：

data-target的{{1}}属性和<button class="navbar-toggler">的{{1}}属性必须匹配，此功能才能起作用（{＃1}以井号开始引用ID）。

示例：

id

这是一个最小的工作示例，仅隔离与该主题相关的元素：

<div class="navbar-collapse">

data-target属性也应该匹配，尽管没有此功能似乎也可以使用。

以下是完整的工作代码：

<button class="navbar-toggler" data-target="#collapseElement" aria-controls="collapseElement"></button>
<div class="collapse navbar-collapse" id="collapseElement">

实际上，请确保始终在页面顶部也包含指向样式表的链接。

Answer 2

切换按钮上的data-target="#navbarToggleExternalContent"错误。它应该与.navbar-collapse的ID匹配。

通过data-属性here

了解有关Bootstrap 4崩溃的更多信息

Answer 3

切换data-target="#navbarNavDropdown"即可生效。希望对您有帮助。

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
<nav class="navbar navbar-expand-lg navbar-light" style="background-color: #FFFFFF;">
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavDropdown" aria-controls="navbarToggleExternalContent" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
  </button>
  <div class="collapse navbar-collapse justify-content-center" id="navbarNavDropdown">
    <a class="navbar-brand" href="index.html">
      <img src="images\logo1.png" width="200" height="80" class="d-inline-block align-top" alt="">
    </a>
    <ul class="navbar-nav">
      <li class="nav-item active">
        <a class="nav-link" href="index.html">Home <span class="sr-only">(current)</span></a>
      </li>
      <li class="navbar-nav dropdown">
        <a class="nav-link dropdown-toggle" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
          Behandelingen
        </a>
        <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
          <a class="dropdown-item" href="sportmassage.html">Sportmassage</a>
          <a class="dropdown-item" href="massagetherapie.html">Massagetherapie</a>
          <a class="dropdown-item" href="ontspanningsmassage.html">Ontspanningsmassage</a>
        </div>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="tarieven.html">Tarieven</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="contact.html">Contact</a>
      </li>
    </ul>
  </div>
</nav>

Answer 4

请确保您的ID

data-target =“＃navbarToggleExternalContent”

和

id =“ navbarToggleExternalContent”>

应该相同

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
  
</head>
<body>
<nav class="navbar navbar-expand-lg navbar-light" style="background-color: #FFFFFF;">
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarToggleExternalContent" aria-controls="navbarToggleExternalContent" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
  </button>
  <div class="collapse navbar-collapse justify-content-center" id="navbarToggleExternalContent">
    <a class="navbar-brand" href="index.html">
      <img src="images\logo1.png" width="200" height="80" class="d-inline-block align-top" alt="">
    </a>
    <ul class="navbar-nav">
      <li class="nav-item active">
        <a class="nav-link" href="index.html">Home <span class="sr-only">(current)</span></a>
      </li>
      <li class="navbar-nav dropdown">
        <a class="nav-link dropdown-toggle" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
          Behandelingen
        </a>
        <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
          <a class="dropdown-item" href="sportmassage.html">Sportmassage</a>
          <a class="dropdown-item" href="massagetherapie.html">Massagetherapie</a>
          <a class="dropdown-item" href="ontspanningsmassage.html">Ontspanningsmassage</a>
        </div>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="tarieven.html">Tarieven</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="contact.html">Contact</a>
      </li>
    </ul>
  </div>
</nav>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
</body>
</html>

单击后折叠的Bootstrap导航栏无法打开

4 个答案:

您的问题：

请确保您的ID

应该相同