What could be causing the collapsible links in my Bootstrap 5 project to be unresponsive?

I encountered an issue when updating from Bootstrap 4.5.3 to version 5.0.0 using the CDN bundle. Previously, with Bootstrap 4.5.3 loaded via the CDN bundle, a dropdown feature was working perfectly:

<!-- Nav Item - Pages Collapse Menu -->
<li class="nav-item">
    <a class="nav-link collapsed" href="#" data-toggle="collapse" data-target="#collapseTwo"
        aria-expanded="true" aria-controls="collapseTwo">
        <span>AAAA</span>
    </a>
    <div id="collapseTwo" class="collapse" aria-labelledby="headingTwo" data-parent="#accordionSidebar">
        <div class="bg-white py-2 collapse-inner rounded">
            <h6 class="collapse-header">BBBB</h6>
            <a class="collapse-item" href="CCCC.html">CCCC</a>
            <a class="collapse-item" href="DDDD.html">DDDD</a>
        </div>
    </div>
</li>

However, after upgrading to Bootstrap 5.0.0 through the CDN bundle:

<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="dcbeb3b3a8afa8aebdac9ce9f2ecf2ecf1beb9a8bded">[email protected]</a>/dist/js/bootstrap.bundle.min.js" integrity="sha384-ygbV9kiqUc6oa4msXn9868pTtWMgiQaeYH7/t7LECLbyPA2x65Kgf80OJFdroafW" crossorigin="anonymous"></script>

The dropdown feature became unresponsive. I'm puzzled about why this change led to the malfunctioning of the dropdown. Any insights or tools for troubleshooting would be greatly appreciated.

For reference, my project originally used Bootstrap 4.5.3 as shown by this line in index.html:

<script src="vendor/jquery/jquery.min.js"></script>
<script src="vendor/bootstrap/js/bootstrap.bundle.min.js"></script>

The transition to Bootstrap 4.5.3 via the CDN bundle was seamless and everything continued to function properly. However, changing that last script line to upgrade to Bootstrap 5.0.0 introduced issues within the dropdown functionality.

If anyone can shed light on how to successfully migrate this code to Bootstrap 5.0.0 and whether JQuery is necessary for the process, it would be of immense help.

javascripttwitter-bootstrapbootstrap-4dropdownbootstrap-5

Answer №1

While Bootstrap 5 does not necessarily require jQuery, it is still compatible with it.

Upon examining your code against the Collapse documentation, you will notice that there has been a change in attribute naming from data-toggle to data-bs-toggle for Bootstrap 5. Additionally, anchors now utilize the href attribute to specify the target, as opposed to a data attribute. Resolving these issues should address any functionality concerns.

<!DOCTYPE html>

<head>
  <!-- Include Bootstrap CSS (Version 5.0.0) via CDN-->
  <link href="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="5e3c31312a2d2a2c3f2e1e6b706e706e733c3b2a3f6f">[email protected]</a>/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-giJF6kkoqNQ00vy+HMDP7azOuL0xtbfIcaT9wjKHr8RbDVddVHyTfAAsrekwKmP1" crossorigin="anonymous">

</head>

<body>
  <ul class="navbar-nav bg-gradient-primary sidebar sidebar-dark accordion" 
    id="accordionSidebar">

    <!-- Navbar Item - Expandable Menu -->
    <li class="nav-item">
      <a class="nav-link collapsed" href="#collapseTwo" 
      data-bs-toggle="collapse" aria-expanded="true" aria-controls="collapseTwo">
        <span>Components</span>
      </a>

      <div id="collapseTwo" class="collapse" aria-labelledby="headingTwo" 
      data-parent="#accordionSidebar">
        <div class="bg-white py-2 collapse-inner rounded">
          <h6 class="collapse-header">Custom Components:</h6>
          <a class="collapse-item" href="buttons.html">Buttons</a>
          <a class="collapse-item" href="cards.html">Cards</a>
        </div>
      </div>
    </li>
  </ul>
  <!-- End of Sidebar -->

  <script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="492b26262d3a3d3b2839097c67796779642b2c3d2878">[email protected]</a>/dist/js/bootstrap.bundle.min.js" integrity="sha384-ygbV9kiqUc6oa4msXn9868pTtWMgiQaeYH7/t7LECLbyPA2x65Kgf80OJFdroafW" crossorigin="anonymous"></script>
</body>

</html>

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