index.html

<!-- index.html -->

<nav class="navbar navbar-dark bg-dark navbar-expand-md" role="navigation">
  <div class="container">
    <a class="navbar-brand" href="/">Personal Site</a>
    
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#globalNav" aria-controls="globalNav" aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span>
    </button>
      
    <div class="collapse navbar-collapse" id="globalNav">
      <ul class="navbar-nav">
        <!-- items -->
      </ul>
    </div>  
  </div>
</nav>