Question

即使我只是从bootstrap组件页面复制代码，导航栏上的这个下拉列表也不起作用。我已经尝试了许多解决方案，比如安排脚本标签和其他东西，但仍然无效。

<html>
    <head>
        <title> This is homepage </title>
        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" integrity="sha384-0mSbJDEHialfmuBBQP6A4Qrprq5OVfW37PRR3j5ELqxss1yVqOtnepnHVP9aJ7xS" crossorigin="anonymous"></script>
        <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.0.0/jquery.min.js"></script>
        <script type="text/javascript" charset="utf8" src="//cdn.datatables.net/1.10.12/js/jquery.dataTables.min.js"></script>
        <link rel="stylesheet" type="text/css" href="<?php echo base_url('css/style.css');?> ">
        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">
        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap-theme.min.css" integrity="sha384-fLW2N01lMqjakBkx3l/M9EahuwpSfeNvV63J5ezn3uZzapT0u7EYsXMjQV+0En5r" crossorigin="anonymous">
        <link rel="stylesheet" type="text/css" href="//cdn.datatables.net/1.10.12/css/jquery.dataTables.min.css">   
    </head>
    <body>
        <nav class="navbar navbar-default navbar-static-top">
          <div class="container-fluid">
            <div class="navbar-header">
              <a class="navbar-brand" href="#">
                <img alt="Brand" src="#">
              </a>
            </div>
            <div class="collapse navbar-collapse" id="navbar-collapse">
              <ul class="nav navbar-nav">
                <li><a href="#"> Home </a></li>
                <li><a href="#"> Home </a></li>
                <li><a href="#"> Home </a></li>
                <li class="dropdown">
                  <a href="#" class="dropdown-toggle" data-toggle="dropdown"> Dropdown <span class="caret"></span></a>
                  <ul class="dropdown-menu">
                    <li><a href="#">Link 1</a></li>
                    <li><a href="#">Link 2</a></li>
                    <li role="separator" class="divider"></li>
                    <li><a href="#">Link 3</a></li>
                    <li role="separator" class="divider"></li>
                    <li><a href="#">Link 4</a></li>
                  </ul>
                </li>
              </ul>
              <form class="navbar-form navbar-right" role="search">
                <div class="form-group">
                  <input type="text" class="form-control" placeholder="Type Here To Search">
                </div>
                <button type="submit" class="btn btn-default"><span class="glyphicon glyphicon-search" aria-hidden="true"></span> </button>
              </form>
            </div>
          </div>
        </nav>
    </body>
</html>

你可以看到我已经在代码上放了javascript，jquery和css，它仍然无效。请帮忙。

Answer 1

这里的问题是你在bootstrap.min.js之前加载jquery.min.js而Bootstrap依赖于jQuery。您将在控制台中看到有关未定义函数的错误。

此外，根据hashbangs，不支持jQuery版本3。请使用版本2. *。

简单地改变：

<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" integrity="sha384-0mSbJDEHialfmuBBQP6A4Qrprq5OVfW37PRR3j5ELqxss1yVqOtnepnHVP9aJ7xS" crossorigin="anonymous"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.0.0/jquery.min.js"></script>

为：

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" integrity="sha384-0mSbJDEHialfmuBBQP6A4Qrprq5OVfW37PRR3j5ELqxss1yVqOtnepnHVP9aJ7xS" crossorigin="anonymous"></script>

Answer 2

<html>
    <head>
        <title> This is homepage </title>
      <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" integrity="sha384-0mSbJDEHialfmuBBQP6A4Qrprq5OVfW37PRR3j5ELqxss1yVqOtnepnHVP9aJ7xS" crossorigin="anonymous"></script>
        <script type="text/javascript" charset="utf8" src="//cdn.datatables.net/1.10.12/js/jquery.dataTables.min.js"></script>
        <link rel="stylesheet" type="text/css" href="<?php echo base_url('css/style.css');?> ">
        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">
        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap-theme.min.css" integrity="sha384-fLW2N01lMqjakBkx3l/M9EahuwpSfeNvV63J5ezn3uZzapT0u7EYsXMjQV+0En5r" crossorigin="anonymous">
        <link rel="stylesheet" type="text/css" href="//cdn.datatables.net/1.10.12/css/jquery.dataTables.min.css">   
    </head>
    <body>
        <nav class="navbar navbar-default navbar-static-top">
          <div class="container-fluid">
            <div class="navbar-header">
              <a class="navbar-brand" href="#">
                <img alt="Brand" src="#">
              </a>
            </div>
            <div class="collapse navbar-collapse" id="navbar-collapse">
              <ul class="nav navbar-nav">
                <li><a href="#"> Home </a></li>
                <li><a href="#"> Home </a></li>
                <li><a href="#"> Home </a></li>
                <li class="dropdown">
                  <a href="#" class="dropdown-toggle" data-toggle="dropdown"> Dropdown <span class="caret"></span></a>
                  <ul class="dropdown-menu">
                    <li><a href="#">Link 1</a></li>
                    <li><a href="#">Link 2</a></li>
                    <li role="separator" class="divider"></li>
                    <li><a href="#">Link 3</a></li>
                    <li role="separator" class="divider"></li>
                    <li><a href="#">Link 4</a></li>
                  </ul>
                </li>
              </ul>
              <form class="navbar-form navbar-right" role="search">
                <div class="form-group">
                  <input type="text" class="form-control" placeholder="Type Here To Search">
                </div>
                <button type="submit" class="btn btn-default"><span class="glyphicon glyphicon-search" aria-hidden="true"></span> </button>
              </form>
            </div>
          </div>
        </nav>
    </body>
</html>

Answer 3

问题出在jquery的版本中。我尝试将其更改为

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>

及其工作。非常感谢你。

导航栏上的Bootstrap下拉列表不起作用

3 个答案: