Navbar Collapse Not Working. Please Help! [SOLVED]

HTML-CSS
1

The hamburger button is showing but it doesn’t collapse when clicked.
Here’s the codepen link:https://codepen.io/evil-smiley/pen/wrorqd

<nav class="navbar navbar-inverse">
  <div class="container-fluid">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>                        
      </button>
    </div>
    <div class="collapse navbar-collapse" id="myNavbar">
      <ul class="nav navbar-nav navbar-right">
        <li class="active"><a href="#">About</a></li>
        <li><a href="#">Portfolio</a></li>
        <li><a href="#">Contact</a></li>
      </ul>
    </div>
  </div>
</nav>

I included jQuery https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js
and Bootstrap 3.3.7

Can’t figure out what’s wrong and I’m stuck with this. Please help! Thanks.

2

You also need to include Bootstrap.js. It’s also in the quick-add in the JS settings.

3

Thanks! It’s now working!

4

I have a same problem too. Can you please shows me how to fix this problem ?