animation-fill-mode

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Summary

The animation-fill-mode CSS property specifies how a CSS animation should apply styles to its target before and after it is executing.

• Initial value none
• Applies to all elements, and ::before and ::after pseudo-elements
• Inherited no
• Media visual
• Computed value as specified
• Animatable no
• Canonical order the unique non-ambiguous order defined by the formal grammar

Syntax

Formal syntax: <single-animation-fill-mode>#

animation-fill-mode: none
animation-fill-mode: forwards
animation-fill-mode: backwards
animation-fill-mode: both

The # indicates that several values may be given, separated by commas.
Each applies to the animation defined in the same order in animation-name.
animation-fill-mode: none, backwards
animation-fill-mode: both, forwards, none

Values

none

The animation will not apply any styles to the target before or after it is executing.

forwards

The target will retain the computed values set by the last keyframe encountered during execution. The last keyframe encountered depends of 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 of 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.

Examples

h1 {
  animation-fill-mode: forwards;
}

Specifications

Specification	Status	Comment
CSS Animations	Working Draft

Browser compatibility

See also

• Using CSS animations
• AnimationEvent
• Animation-related CSS properties and at-rules: animation, animation-delay, animation-direction, animation-duration, animation-fill-mode, animation-iteration-count, animation-name, animation-play-state, animation-timing-function, @keyframes.