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With CSS set the element to retain the style values that is set by the first keyframe
The CSS animation-fill-mode property with the backwards value makes an element retain the style values defined in the first keyframe (the from or 0% state) before the animation begins. This is particularly useful when you want the element to appear in its starting animation state during any animation delay.
Syntax
selector {
animation-fill-mode: backwards;
}
Example
The following example demonstrates how animation-fill-mode: backwards applies the first keyframe styles before the animation starts −
<!DOCTYPE html>
<html>
<head>
<style>
.box {
width: 150px;
height: 100px;
background: red;
position: relative;
animation-name: moveBox;
animation-duration: 2s;
animation-delay: 1s;
animation-fill-mode: backwards;
margin: 50px;
}
@keyframes moveBox {
from {
left: 0px;
background-color: green;
}
to {
left: 200px;
background-color: blue;
}
}
</style>
</head>
<body>
<div class="box"></div>
</body>
</html>
A green box appears immediately (applying the first keyframe styles), waits for 1 second due to the delay, then animates from green to blue while moving from left 0px to left 200px over 2 seconds.
Key Points
When using animation-fill-mode: backwards:
- The element adopts styles from the first keyframe (
fromor0%) before animation starts - This is most noticeable when there's an
animation-delay - Without
backwards, the element would keep its original styles during the delay period
Conclusion
The animation-fill-mode: backwards property ensures smooth visual continuity by applying first keyframe styles immediately. This creates a more polished animation experience, especially when delays are involved.
Updated on: 2026-03-15T12:31:21+05:30
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