How to change dropdown button text when an item is clicked?

You have not mentioned the dropdown list code in your question based on which we will write a code, here we are presenting bootstrap supported dropdown list whose button text will change according to the selected tab.

Check by clicking on this dropdown button:

• Include bootstrap's CSS and JS links in your project: Get Bootstrap
• Include google's ajax library in head section:

  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>

• Include bootstrap dropdown menu code where you want:

  <div class="dropdown">
      <button class="btn btn-primary dropdown-toggle my-toggle-button" type="button" data-bs-toggle="dropdown" aria-expanded="false">
          Home
      </button>
      <ul class="dropdown-menu" id="my-active-tab">
          <li><a class="dropdown-item" href="#">Home</a></li>
          <li><a class="dropdown-item" href="#">Services</a></li>
          <li><a class="dropdown-item" href="#">Contect</a></li>
          <li><a class="dropdown-item" href="#">About Us</a></li>
      </ul>
  </div>

   
  • Give a own class or id to toggle button
  • Give a own class or id to dropdown-menu
• Add this JavaScript code and edit its class and id according to your code:

  <script>
      $("#active-tab li").on("click", function() {
          $('.my-toggle-button').text($(this).text());
      });
  </script>