Passing Variables to CSS Animations with JavaScript
When working with CSS animations, the ability to pass values as parameters from JavaScript can be incredibly useful. This allows for a dynamic and interactive experience.
Solution: CSS Variables
In CSS, using variables enables the passing of values from JavaScript to animations. For instance:
.p1, .p2 {
animation-duration: 3s;
animation-name: slidein;
}
@keyframes slidein {
from {
margin-left: var(--m, 0%);
width: var(--w, 100%);
}
to {
margin-left: 0%;
width: 100%;
}
}
Implementation in JavaScript
Using JavaScript, you can then set these variables:
document.querySelector('.p2').style.setProperty('--m','100%');
document.querySelector('.p2').style.setProperty('--w','300%');
Example Usage
This will alter the animation of the element with the class "p2":
<p class="p1"> This will not animate as the animation will use the default value set to the variable </p> <p class="p2"> This will animate because we changed the CSS variable using JS </p>
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