What could be the issue with my transition not functioning on the Bootstrap navigation bar?

Why doesn't the transition effect work on my bootstrap website even though I've added transition: 0.5s? Strangely, it works perfectly fine when testing on a custom div on the jsfiddle site. Check it out here

window.addEventListener('scroll', function() {
    var header = document.getElementById("navbar");
    header.classList.toggle("fixednav", window.scrollY > 100);
});
.fixednav {
    transition: 0.5s;
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    z-index: 9999;

}

Answer №1

When the navigation loses the .fixednav class, it also loses the transition property.

To fix this issue, add the transition property to the .nav class:

.nav {
  width: 100%;
  height: 250px;
  background: red;
  transition: 0.5s;
}

Make sure to check if Bootstrap is properly loaded in your project and that no other CSS is disabling the transition effect.

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