Create an animated effect using JavaScript to toggle the classList

As I delved into the world of CSS and HTML, I stumbled upon an interesting tutorial for creating a responsive navbar. You can check it out here.

The tutorial showcases the mobile version of the navbar using the javascript function classList.toggle. I was wondering if there is a way to add animation and transition effects to this functionality?

function myFunction() {
document.getElementsByClassName("topnav")[0].classList.toggle("responsive");}

Answer №1

The class attribute cannot be animated directly, but you can animate CSS properties instead.

To start, create an initial CSS definition for your .topnav class like so:

.topnav {
    background-color: black; /* Set initial background color */
    transition: background-color 200ms; /* Enable transition for background color changes */
}

This code ensures that whenever the background color of your .topnav element changes, a smooth transition will take place.

For instance, you can add the following CSS:

.topnav.responsive {
    background-color: blue;
}

With this setup, your JS code should work seamlessly.

Keep in mind that these examples are basic and only demonstrate transitioning background colors. However, they serve as a good starting point for addressing your issue :)

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