<nav class="navbar navbar-expand-lg bg-primary" data-bs-theme="dark">
  <div class="container-fluid">
    <a class="navbar-brand" href="#">Navbar</a>
    <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-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 me-auto mb-2 mb-lg-0">
        <li class="nav-item">
          <a class="nav-link active" aria-current="page" href="#">Home</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="#" role="button" data-bs-toggle="dropdown" aria-expanded="false">
            Dropdown
          </a>
          <ul class="dropdown-menu">
            <li><a class="dropdown-item" href="#">Action</a></li>
            <li><a class="dropdown-item" href="#">Another action</a></li>
            <li><hr class="dropdown-divider"></li>
            <li><a class="dropdown-item" href="#">Something else here</a></li>
          </ul>
        </li>
        <li class="nav-item">
          <a class="nav-link disabled">Disabled</a>
        </li>
      </ul>
      <form class="d-flex" role="search">
        <input class="form-control me-2" type="search" placeholder="Search" aria-label="Search">
        <button class="btn btn-outline-success" type="submit">Search</button>
      </form>
    </div>
  </div>
</nav>
.dropdown-menu {
  animation: slideUp 0.3s ease-in-out;
}

@keyframes slideUp {
  from {
    transform: translateY(8px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}
(function($) {
	"use strict";
  
  // Dropdown on Hover
  $('.dropdown').hover(
    function () {
      $(this).find('> .dropdown-toggle').addClass('show');
      $(this).find('> .dropdown-toggle').attr('aria-expanded', 'true');
      $(this).find('> .dropdown-menu').addClass('show');
    },
    function() {
      $(this).find('> .dropdown-toggle').removeClass('show');
      $(this).find('> .dropdown-toggle').attr('aria-expanded', 'false');
      $(this).find('> .dropdown-menu').removeClass('show');
    }
  );
  // Dropdown on Hover End
})(jQuery);

External CSS

  1. https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css

External JavaScript

  1. https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/js/bootstrap.bundle.min.js
  2. https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.4/jquery.min.js