如何让折叠的Bootstrap导航栏平滑地打开到全屏高度？

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

  <div class="collapse navbar-collapse" id="navbar">
    <ul class="navbar-nav ml-auto">
      <li class="nav-item active">
        <a class="nav-link" href="#">Home</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">About</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Services</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Contact</a>
      </li>
    </ul>
  </div>
</nav>

.navbar {
  height: 60px;
  transition: height 0.3s ease-in-out;
}

$(document).ready(function() {
  $('.navbar-toggler').click(function() {
    if ($('.navbar').height() == 60) {
      $('.navbar').height('100vh');
    } else {
      $('.navbar').height(60);
    }
  });
});