Bootstrap 3 drop down menu not working

Question

<div class="container">

    <div class="navbar-header">
        <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
            <span class="glyphicon glyphicon-align-justify"></span>
        </button>
        <a href="index.php" class="navbar-brand">Mudalali | Sidadiya.lk</a>
    </div>

    <div class="navbar-collapse collapse">
        <ul class="nav navbar-nav" id="top-nav">
            <li><a href="#section-home">Home</a></li>
            <li><a href="#section-about">About</a></li>
            <li><a href="#section-service">Services</a></li>
            <li><a href="#section-contact">Contact</a></li>
            <li class="dropdown">
      <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown <b class="caret"></b></a>
      <ul class="dropdown-menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li class="divider"></li>
        <li><a href="#">Separated link</a></li>
      </ul>
    </li>

        </ul>
        <?php echo $loginLink; ?>            
       <!-- <a href="#" class="btn btn-primary pull-right">Registe1r</a>
        <a href="#" class="btn btn-success pull-right" data-toggle="modal" href="#loginModal">Login</a>-->              

</div>

I placed this code in a seperate file not in index.php (ie root/PHP_INCLUDES/header.php).

I would be happy if someone can help me to find the error .

Thanks in advance

Answer 1

看来您的代码工作正常，请查看此小提琴，让我知道我是否从您的代码中遗漏了任何东西，或者您可能错过了放置某些东西的方法... http://www.bootply.com/130454