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The animation-direction CSS property specifies whether an animation should play forwards, backwards, or alternating back and forth.

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

Syntax

/* Single animation */
animation-direction: normal;
animation-direction: reverse;
animation-direction: alternate;
animation-direction: alternate-reverse;

/* Multiple animations */
animation-direction: normal, reverse;
animation-direction: alternate, reverse, normal;

/* Global values */
animation-direction: inherit;
animation-direction: initial;
animation-direction: unset;

Values

normal
The animation plays forwards each cycle. In other words, each time the animation cycles, the animation will reset to the beginning state and start over again. This is the default value.
reverse
The animation plays backwards each cycle. In other words, each time the animation cycles, the animation will reset to the end state and start over again. Animation steps are performed backwards, and timing functions are also reversed. For example, an ease-in timing function becomes ease-out.
alternate
The animation reverses direction each cycle, with the first iteration being played forwards. The count to determine if a cycle is even or odd starts at one.
alternate-reverse
The animation reverses direction each cycle, with the first iteration being played backwards. The count to determinate if a cycle is even or odd starts at one.

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 syntax

<single-animation-direction>#

where
<single-animation-direction> = normal | reverse | alternate | alternate-reverse

Examples

See CSS animations for examples.

Specifications

Initial valuenormal
Applies toall elements, ::before and ::after pseudo-elements
Inheritedno
Mediavisual
Computed valueas specified
Animation typediscrete
Canonical orderthe unique non-ambiguous order defined by the formal grammar

Specification Status Comment
CSS Animations
The definition of 'animation-direction' in that specification.
Working Draft Initial definition.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support

43

Yes -webkit-

12

12 -webkit-

16

49 -webkit-

44 -webkit- 1

5 -moz-

10

30

15 -webkit-

12.1 — 15

12 — 15 -o-

Yes

4 -webkit-

reverse19121610 Yes Yes
alternate-reverse19121610 Yes Yes
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support

43

Yes -webkit-

43

Yes -webkit-

Yes

Yes -webkit-

16

49 -webkit-

44 -webkit- 1

5 -moz-

30

15 -webkit-

12.1 — 15

12 — 15 -o-

Yes

Yes -webkit-

4.0

Yes -webkit-

reverse No Yes Yes16 ? No Yes
alternate-reverse ? Yes Yes16 ? ? Yes

1. 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.

See also