Bootstrap dropdown menu not visible

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This is my piece of code. I have the navbar which is visible but the drop down menu is not visible. I have copied the code from the bootstrap official site itself.
I cannot see the dropdown menu and cannot understand where am I making a mistake?

What I have tried:

The below code is my code which I have copied from the official site

<pre><html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
    <link href="Content/css/bootstrap.css" rel="stylesheet" />
    <title></title>
    <style>
        
    </style>
</head>
   
<body>
   
<nav class="navbar navbar-expand-lg navbar-light bg-light">
  <a class="navbar-brand" href="#">Navbar</a>
  <div class="collapse navbar-collapse" id="navbarNavDropdown">
    <ul class="navbar-nav">
      <li class="nav-item">
        <a class="nav-link" href="#">Home </a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Features</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Pricing</a>
      </li>
      <li class="nav-item dropdown">
        <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true"
             aria-expanded="false">
          Dropdown link
        </a>
        <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
          <a class="dropdown-item" href="#">Action</a>
          <a class="dropdown-item" href="#">Another action</a>
          <a class="dropdown-item" href="#">Something else here</a>
        </div>
      </li>
    </ul>
  </div>
</nav>
    <asp:ContentPlaceHolder ID="MainContentPlaceholder" runat="server">
    </asp:ContentPlaceHolder>

</body>
</html>

Posted 10-Aug-20 0:26am

Member 14872744

Updated 13-Oct-22 0:21am

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3 solutions

Solution 1

You haven't included the required Bootstrap Javascript files (popper.js and bootstrap.js).

HTML

<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous"></script>

<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.1/dist/umd/popper.min.js" integrity="sha384-9/reFTGAW83EW2RDu2S0VKaIzap3H66lZH81PoYlFhbGU+6BZp6G7niu735Sk7lN" crossorigin="anonymous"></script>

<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js" integrity="sha384-B4gt1jrGC7Jh4AgTPSdUtOBvfO8shuf57BaghqFfPlYxofvL8/KUEfYiJOMMV+rV" crossorigin="anonymous"></script>

You're also missing the toggle button:

HTML

<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavDropdown" aria-controls="navbarNavDropdown" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
</button>

Navbar · Bootstrap v4.5[^]
Demo[^]

Posted 10-Aug-20 0:56am

Richard Deeming

Updated 10-Aug-20 1:00am

v2

Solution 3

Very simple solution for this is first of all check if you have loaded bootstrap js or not if it still doesn't work then you need to check which js file you have loaded you have to load bootstrap.bundle.js or bootstrap.bundle.min.js and it will work for sure....
I got this after r&d of a couple hours.

Posted 13-Oct-22 0:21am

Member 15796449

Comments

Richard Deeming 13-Oct-22 7:28am

As already clearly explained in the two existing solutions, posted back in 2020.

Unless you have something new and interesting to add to the discussion, stick to answering new questions where the OP is still looking for help.

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Sandeep Mewara · Accepted Answer · 2020-08-10T01:02:00

I think you are missing he JavaScript script files - bootstrap.min.js

Following looks good to me and working:

HTML

<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js"></script>
</head>
<body>
<div class="bs-example">
    <nav class="navbar navbar-expand-md navbar-light bg-light">
        <a href="#" class="navbar-brand">Brand</a>
        <div id="navbarCollapse" class="collapse navbar-collapse">
            <ul class="nav navbar-nav">
                <li class="nav-item dropdown">
                    <a href="#" class="nav-link dropdown-toggle" data-toggle="dropdown">Messages</a>
                    <div class="dropdown-menu">
                        <a href="#" class="dropdown-item">Inbox</a>
                        <a href="#" class="dropdown-item">Drafts</a>
                        <a href="#" class="dropdown-item">Sent Items</a>
                        <div class="dropdown-divider"></div>
                        <a href="#"class="dropdown-item">Trash</a>
                    </div>
                </li>
            </ul>
        </div>
    </nav>
</div>
</body>
</html>

Bootstrap dropdown menu not visible

3 solutions

Solution 2

Solution 1

Solution 3

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