Bootstrap - lezione 5

<!doctype html>
<html lang="en">

<head>
  <title>Title</title>
  <!-- Required meta tags -->
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

  <!-- Bootstrap CSS v5.3.0 -->
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet"
        integrity="sha384-9ndCyUaIbzAi2FUVXJi0CjmCapSmO7SnpJef0486qhLnuZ2cdeRhO02iuK6FUUVM"
        crossorigin="anonymous">
</head>

<body>

  <nav class="navbar navbar-expand-lg text-bg-warning" >

    <button class="navbar-toggler" data-bs-toggle="collapse" data-bs-target="#navBar">
      <span class="navbar-toggler-icon"></span>
    </button>

    <div class="collapse navbar-collapse" id="navBar">
       <ul class="navbar-nav">
        <li class="nav-item"> <a href="#" class="nav-link">Home</a>  </li>
        <li class="nav-item"> <a href="#" class="nav-link">File</a>         </li>
        <li class="nav-item"> <a href="yt_05_menu.html" class="nav-link">Modifica</a>     </li>
        <li class="nav-item"> <a href="#" class="nav-link">Strumenti</a>    </li>
        <li class="nav-item"> <a href="#" class="nav-link">Contatti</a>     </li>
      </ul>
    </div>

  </nav>


  <!-- Bootstrap JavaScript Libraries -->
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"
          integrity="sha384-geWF76RCwLtnZ8qwWowPQNguL3RmwHVBC9FhGdlKrxdiJJigb/j/68SIy3Te4Bkz"
          crossorigin="anonymous"></script>

  <script>

    const pagina = document.URL.substring(document.URL.lastIndexOf('/')+1);
    const link_da_attivare = document.querySelector("a[href='"+pagina+"']");
    link_da_attivare.classList.add("active");

  </script

</body>

</html>