Bootstrp 5

CSS

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/5.0.0-alpha2/css/bootstrap.min.css" integrity="sha384-DhY6onE6f3zzKbjUPRc2hOzGAdEf4/Dz+WJwBvEYL/lkkIsI3ihufq9hk9K4lVoK" crossorigin="anonymous">

Navigation Bar

<nav class="navbar navbar-expand-lg navbar-dark bg-dark">
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarTogglerDemo01" aria-controls="navbarTogglerDemo01" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
  </button>
  <div class="collapse navbar-collapse" id="navbarTogglerDemo01">
    <a class="navbar-brand" href="">Home</a>
    <ul class="navbar-nav ml-auto">
      <li class="nav-item">
        <a class="nav-link" href="">Home</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="">Blog</a>
      </li>
    </ul>
  </div>
</nav>