Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

CSS Bootstrap Basics Using Bootstrap Components Building a Navbar

Posted by Zoltán Erkel
Zoltán Erkel
6,340 Points

nav-bar toggler does not expand when clicked

Copying the code snippet below from Bootstraps, the toggler does not work (does not expand) when clicked, although it does get highlighted 

<nav class="navbar navbar-expand-lg navbar-light bg-light">
  <div class="container-fluid">
    <a class="navbar-brand" href="#">Navbar</a>
    <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNavAltMarkup" aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span>
    </button>
    <div class="collapse navbar-collapse" id="navbarNavAltMarkup">
      <div class="navbar-nav">
        <a class="nav-link active" aria-current="page" href="#">Home</a>
        <a class="nav-link" href="#">Features</a>
        <a class="nav-link" href="#">Pricing</a>
        <a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true">Disabled</a>
      </div>
    </div>
  </div>
</nav>

    <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.11.0/umd/popper.min.js" integrity="sha384-b/U6ypiBEHpOf/4+1nzFpr53nxSS+GLCkfwBdFNTxtclqqenISfwAzpKaMNFNmj4" crossorigin="anonymous"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/js/bootstrap.min.js" integrity="sha384-h0AbiXch4ZDo7tp9hKZ4TsHbi047NrKGLO3SEJAg45jXxnGIfYzk4Si90RDIqNm1" crossorigin="anonymous"></script>
  </body>
</html>

2 Answers

Gábor Szalai
Gábor Szalai
17,878 Points
Gábor Szalai
Gábor Szalai
17,878 Points

Hi! You're not using the right scripts. It will work with these:

<!-- JavaScript Bundle with Popper --> <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta1/dist/js/bootstrap.bundle.min.js" integrity="sha384-ygbV9kiqUc6oa4msXn9868pTtWMgiQaeYH7/t7LECLbyPA2x65Kgf80OJFdroafW" crossorigin="anonymous"> </script>

You can copy this from the Bootstrap website: https://getbootstrap.com/

Zoltán Erkel
Zoltán Erkel
6,340 Points

Hey Gábor,

Cheers! I'm guessing at this point there have been so many updates to the Bootstrap scripts that the video is lacking some of the new scripts (already updated some when I got to this point). :)

JASON LEE
JASON LEE
17,351 Points
JASON LEE
JASON LEE
17,351 Points

This leads to my question -- is it better practice to rely on "internal" dependent files (js, css, etc) instead of "external" links? Because if the link changes, it may alter the content or make it non-functional. As a web dev professional, your client site may not work one day because of changes in the external links, and you might have to make an emergency update.