Issues with properly functioning collapse button in Bootstrap 5.1.3 Navigation Bar

When I initially click on the collapsed nav-bar button, it expands to show the nav-bar contents. However, upon clicking the button again, it fails to collapse. Below is the corresponding HTML code snippet.

*<!-- CSS Stylesheet -->*
  <link href="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="74161b1b00070006150434415a455a47">[email protected]</a>/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3" crossorigin="anonymous"&…
  
  *<!-- Bootstap Scripts -->*
  <script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="30525f5f44434442514070051e011e03">[email protected]</a>/dist/js/bootstrap.bundle.min.js" integrity="sha384-ka7Sk0Gln4gmtz2MlQnikT1wXgYsOg+OMhuP+IlRH9sENBO0LRn5q+8nbTov4+1p" crossori…
  <script src="https://cdn.jsdelivr.net/npm/@popperjs/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="d3b0bca1b693e1fde2e3fde1">[email protected]</a>/dist/umd/popper.min.js" integrity="sha384-7+zCNj/IqJ95wo16oMtfsKbZ9ccEh31eOz1HGyDuCQ6wgnyJNSYdrPa03rtR1zdB" cro…

  <nav class="navbar fixed-top navbar-expand-lg navbar-dark" style="background-color: #95D1CC;">
<div class="container-fluid">
  <a class="navbar-brand" href="#">Simon Game</a>
  <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
  </button>
  <div class="collapse navbar-collapse" id="navbarSupportedContent">
    <ul class="navbar-nav ms-auto mb-2 mb-lg-0">
      <li class="nav-item">
        <a class="nav-link" aria-current="page" href="CSS-My Site/about_index.html">About Developer</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="Instructions/instructions_index.html">Instructions</a>
      </li>
    </ul>
  </div>
</div>
</nav>
htmlcsstwitter-bootstrap

Answer №1

Duplicating all the code is not the way to go. It won't function properly like this.

The correct approach is to either include bootstrap.bundle.min.js OR both popper.min.js and bootstrap.min.js.

I encountered the same issue, and in my scenario, I mistakenly did the following, which is incorrect and leads to the same issue:

import "bootstrap"
import "bootstrap/js/src/collapse"; // remove this line, otherwise it will cause issues

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