bootstrap hamburger menu

1<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
2<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
3<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css">
4
5<nav class="navbar navbar-inverse navbar-static-top" role="navigation">
6  <div class="container">
7    <div class="navbar-header">
8      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
9                    <span class="sr-only">Toggle navigation</span>
10                    <span class="icon-bar"></span>
11                    <span class="icon-bar"></span>
12                    <span class="icon-bar"></span>
13                </button>
14    </div>
15
16    <!-- Collect the nav links, forms, and other content for toggling -->
17    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
18      <ul class="nav navbar-nav">
19        <li><a href="index.php">Home</a></li>
20        <li><a href="about.php">About</a></li>
21        <li><a href="#portfolio">Portfolio</a></li>
22        <li><a href="#">Blog</a></li>
23        <li><a href="contact.php">Contact</a></li>
24      </ul>
25    </div>
26  </div>
27</nav>

1<!-- Image and text -->
2<nav class="navbar navbar-light bg-light">
3  <a class="navbar-brand" href="#">
4    <img src="/docs/4.0/assets/brand/bootstrap-solid.svg" width="30" height="30" class="d-inline-block align-top" alt="">
5    Bootstrap
6  </a>
7</nav>

1<!-- JS, Popper.js, and jQuery -->
2<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous"></script>
3<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
4<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/boots