I am trying to make my HTML/CSS work so when I hover over a list item the other ul appears. The code I have doesn't seem to work.
I made a JSFiddle
.dropdown-content {
  display: none;
}
.navbar>li, a:hover + .dropdown-content {
  display: block;
}<body>
  <div class="navbar">
    <ul>
      <li><a href="#">One</a></li>
      <li><a href="#">One</a></li>
      <li><a href="#">One</a></li>
    </ul>
  </div>
  <div class="dropdown-content">
    <ul>
      <li><a href="#">One</a></li>
      <li><a href="#">One</a></li>
      <li><a href="#">One</a></li>
    </ul>
  </div>
</body>