jQuery dropdown list animation not functioning with .slideDown()

I am currently working on a navigation list with a dropdown menu that should expand downwards and upwards when hovered over. While the .slideUp() function is working perfectly fine, the issue arises with the .slideDown() animation not functioning as expected.

$('.dropdownLink').hover(function(e) {
  e.preventDefault();
  $('#dropdown').slideDown(900, function() {
    $('#dropdown').css("visibility", "visible");
  });
}, function() {
  $('#dropdown').slideUp(900, function() {
    $('#dropdown').css("visibility", "hidden");
  });
});
#dropdown {
  display: flex;
  justify-content: space-around;
  flex-direction: column;
  padding-top: 10px;
  visibility: hidden;
}

#dropdown li {
  margin-top: 13px;
}

#dropdown li a {
  font-size: 0.9em;
  padding: 3px 3px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<nav class="navigation">
  <ul>
    <li><a class="link" href="#">Home</a></li>
    <li><a class="link dropdownLink" href="#">Models <i class="fas fa-caret-down"></i></a>
      <ul id="dropdown">
        <li><a class="link" href="#">Model S</a></li>
        <li><a class="link" href="#">Model 3</a></li>
        <li><a class="link" href="#">Model X</a></li>
        <li><a class="link" href="#">Cybertruck</a></li>
        <li><a class="link" href="#">Roadster</a></li>
        <li><a class="link" href="#">Energy</a></li>
      </ul>
    </li>
    <li><a class="link" href="#">About</a></li>
    <li><a class="link" href="#">Order</a></li>
    <li><a class="link" href="#">Contact</a></li>
  </ul>
</nav>

Answer №1

A simple solution to handling the visibility of elements is by using display: none in your CSS. jQuery can then manage the rest without any hassle.

When it comes to adding event listeners for the hover effect, it's best not to attach it directly to the link. Any slight movement away from the link will cause the submenu to disappear. Instead, apply the listener to the parent <li>.

To prevent issues with animation stacking due to rapid movements in and out, remember to incorporate .stop() as suggested by @Taplar:

$('.dropdownContainer').hover(function(e) {
  e.preventDefault();
  $('#dropdown').stop().slideDown(900);
}, function() {
  $('#dropdown').stop().slideUp(900);   
});
#dropdown {
  display: flex;
  justify-content: space-around;
  flex-direction: column;
  padding-top: 10px;
  display: none;
}

#dropdown li {
  margin-top: 13px;
}

#dropdown li a {
  font-size: 0.9em;
  padding: 3px 3px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<nav class="navigation">
  <ul>
    <li><a class="link" href="#">Home</a></li>
    <li class="dropdownContainer"><a class="link dropdownLink" href="#">Models <i class="fas fa-caret-down"></i></a>
      <ul id="dropdown">
        <li><a class="link" href="#">Model S</a></li>
        <li><a class="link" href="#">Model 3</a></li>
        <li><a class="link" href="#">Model X</a></li>
        <li><a class="link" href="#">Cybertruck</a></li>
        <li><a class="link" href="#">Roadster</a></li>
        <li><a class="link" href="#">Energy</a></li>
      </ul>
    </li>
    <li><a class="link" href="#">About</a></li>
    <li><a class="link" href="#">Order</a></li>
    <li><a class="link" href="#">Contact</a></li>
  </ul>
</nav>

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