bootstrap 4 navbar with top bar code example

Example 1: Bootstrap 4 Navigation Bar

<!-- A grey horizontal navbar that becomes vertical on small screens -->
<nav class="navbar navbar-expand-sm bg-light">

  <!-- Links -->
  <ul class="navbar-nav">
    <li class="nav-item">
      <a class="nav-link" href="#">Link 1</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" href="#">Link 2</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" href="#">Link 3</a>
    </li>
  </ul>

</nav>

Example 2: bootstrap 4 navbar

<!-- Bootstrap 4.6 Navbar -->
<nav class="navbar navbar-expand-lg navbar-light bg-light">
   <a class="navbar-brand" href="#">Navbar</a>
   <button
      class="navbar-toggler"
      type="button"
      data-toggle="collapse"
      data-target="#navbarSupportedContent"
      aria-controls="navbarSupportedContent"
      aria-expanded="false"
      aria-label="Toggle navigation"
   >
      <span class="navbar-toggler-icon"></span>
   </button>

   <div class="collapse navbar-collapse" id="navbarSupportedContent">
      <ul class="navbar-nav mr-auto">
         <li class="nav-item active">
            <a class="nav-link" href="#"
               >Home <span class="sr-only">(current)</span></a
            >
         </li>
         <li class="nav-item">
            <a class="nav-link" href="#">Link</a>
         </li>
         <li class="nav-item dropdown">
            <a
               class="nav-link dropdown-toggle"
               href="#"
               id="navbarDropdown"
               role="button"
               data-toggle="dropdown"
               aria-haspopup="true"
               aria-expanded="false"
            >
               Dropdown
            </a>
            <div class="dropdown-menu" aria-labelledby="navbarDropdown">
               <a class="dropdown-item" href="#">Action</a>
               <a class="dropdown-item" href="#">Another action</a>
               <div class="dropdown-divider"></div>
               <a class="dropdown-item" href="#">Something else here</a>
            </div>
         </li>
         <li class="nav-item">
            <a
               class="nav-link disabled"
               href="#"
               tabindex="-1"
               aria-disabled="true"
               >Disabled</a
            >
         </li>
      </ul>
      <form class="form-inline my-2 my-lg-0">
         <input
            class="form-control mr-sm-2"
            type="search"
            placeholder="Search"
            aria-label="Search"
         />
         <button class="btn btn-outline-success my-2 my-sm-0" type="submit">
            Search
         </button>
      </form>
   </div>
</nav>

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