Web/CSS/animation-fill-mode

The animation-fill-mode CSS property sets how a CSS animation applies styles to its target before and after its execution.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

It is often convenient to use the shorthand property animation to set all animation properties at once.

Syntax

/* Single animation */
animation-fill-mode: none;
animation-fill-mode: forwards;
animation-fill-mode: backwards;
animation-fill-mode: both;

/* Multiple animations */
animation-fill-mode: none, backwards;
animation-fill-mode: both, forwards, none;

Values

none

The animation will not apply any styles to the target when it's not executing. The element will instead be displayed using any other CSS rules applied to it. This is the default value.

forwards

The target will retain the computed values set by the last keyframe encountered during execution. The last keyframe depends on the value of animation-direction and animation-iteration-count:

`animation-direction`	`animation-iteration-count`	last keyframe encountered
`normal`	even or odd	`100%` or `to`
`reverse`	even or odd	`0%` or `from`
`alternate`	even	`0%` or `from`
`alternate`	odd	`100%` or `to`
`alternate-reverse`	even	`100%` or `to`
`alternate-reverse`	odd	`0%` or `from`

backwards

The animation will apply the values defined in the first relevant keyframe as soon as it is applied to the target, and retain this during the animation-delay period. The first relevant keyframe depends on the value of animation-direction:

`animation-direction`	first relevant keyframe
`normal` or `alternate`	`0%` or `from`
`reverse` or `alternate-reverse`	`100%` or `to`

both

The animation will follow the rules for both forwards and backwards, thus extending the animation properties in both directions.

Note: When you specify multiple comma-separated values on an animation-* property, they will be assigned to the animations specified in the animation-name property in different ways depending on how many there are. For more information, see Setting multiple animation property values.

Formal definition

Initial value	`none`
Applies to	all elements, `::before` and `::after` pseudo-elements
Inherited	no
Computed value	as specified
Animation type	discrete

Formal syntax

<single-animation-fill-mode>#where <single-animation-fill-mode> = none | forwards | backwards | both

Examples

You can see the effect of animation-fill-mode in the following example. It demonstrates how, for an animation that runs for an infinite time, you can cause it to remain in its final state rather than reverting to the original state (which is the default).

HTML

<p>Move your mouse over the gray box!</p>
<div class="demo">
 <div class="growsandstays">This grows and stays big.</div>
  <div class="grows">This just grows.</div>
</div>

CSS

.demo {
  border-top: 100px solid #ccc;
  height: 300px;
}

@keyframes grow {
  0% { font-size: 0; }
  100% { font-size: 40px; }
}

.demo:hover .grows {
  animation-name: grow;
  animation-duration: 3s;
}

.demo:hover .growsandstays {
  animation-name: grow;
  animation-duration: 3s;
  animation-fill-mode: forwards;
}

See CSS animations for more examples.

Specifications

Specification	Status	Comment
CSS AnimationsThe definition of 'animation-fill-mode' in that specification.	Working Draft	Initial definition.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`animation-fill-mode`	Chrome Full support 43 Full support 43 Full support 3 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	Edge Full support 12 Full support 12 Full support 12 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	Firefox Full support 16 Full support 16 Full support 49 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit- Full support 44 Prefixed' Disabled' Prefixed' Implemented with the vendor prefix: -webkit- Disabled' From version 44: this feature is behind the `layout.css.prefixes.webkit` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config. Full support 5 Prefixed' Prefixed' Implemented with the vendor prefix: -moz-	IE Full support 10	Opera Full support 30 Full support 30 Full support 15 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit- No support 12.1 — 15 No support 12 — 15 Prefixed' Prefixed' Implemented with the vendor prefix: -o-	Safari Full support 9 Full support 9 Full support 5 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	WebView Android Full support 43 Full support 43 Full support ≤37 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	Chrome Android Full support 43 Full support 43 Full support 18 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	Firefox Android Full support 16 Full support 16 Full support 49 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit- Full support 44 Prefixed' Disabled' Prefixed' Implemented with the vendor prefix: -webkit- Disabled' From version 44: this feature is behind the `layout.css.prefixes.webkit` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config. Full support 5 Prefixed' Prefixed' Implemented with the vendor prefix: -moz-	Opera Android Full support 30 Full support 30 Full support 14 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit- No support 12.1 — 14 No support 12 — 14 Prefixed' Prefixed' Implemented with the vendor prefix: -o-	Safari iOS Full support 9 Full support 9 Full support 4 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-	Samsung Internet Android Full support 4.0 Full support 4.0 Full support 1.0 Prefixed' Prefixed' Implemented with the vendor prefix: -webkit-

Legend

Full support: Full support
User must explicitly enable this feature.': User must explicitly enable this feature.
Requires a vendor prefix or different name for use.': Requires a vendor prefix or different name for use.