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The animation-timing-function CSS property sets how an animation progresses through the duration of each cycle.

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

Syntax

/* Keyword values */
animation-timing-function: ease;
animation-timing-function: ease-in;
animation-timing-function: ease-out;
animation-timing-function: ease-in-out;
animation-timing-function: linear;
animation-timing-function: step-start;
animation-timing-function: step-end;

/* Function values */
animation-timing-function: cubic-bezier(0.1, 0.7, 1.0, 0.1);
animation-timing-function: steps(4, end);
animation-timing-function: frames(10);

/* Multiple animations */
animation-timing-function: ease, step-start, cubic-bezier(0.1, 0.7, 1.0, 0.1);

/* Global values */
animation-timing-function: inherit;
animation-timing-function: initial;
animation-timing-function: unset;

Timing functions may be specified on individual keyframes in a @keyframes rule. If no animation-timing-function is specified on a keyframe, the corresponding value of animation-timing-function from the element to which the animation is applied is used for that keyframe.

A keyframe's timing function is applied on a property-by-property basis from the keyframe on which it is specified until the next keyframe specifying that property, or until the end of the animation if there is no subsequent keyframe specifying that property. As a result, an animation-timing-function specified on the 100% or to keyframe will never be used.

Values

<timing-function>
The timing function that corresponds to a given animation, as determined by animation-name.

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-timing-function>#

where
<single-timing-function> = linear | <cubic-bezier-timing-function> | <step-timing-function> | <frames-timing-function>

where
<cubic-bezier-timing-function> = ease | ease-in | ease-out | ease-in-out | cubic-bezier(<number>, <number>, <number>, <number>)
<step-timing-function> = step-start | step-end | steps(<integer>[, [ start | end ] ]?)
<frames-timing-function> = frames(<integer>)

Examples

See CSS animations for examples.

Specifications

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

Initial valueease
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

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome Full support 43
Full support 43
Full support Yes
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 10Opera 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 Yes
Full support Yes
Full support 4
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
WebView Android Full support Yes
Full support Yes
Full support Yes
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
Chrome Android Full support 43
Full support 43
Full support Yes
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
Edge Mobile Full support Yes
Full support Yes
Full support Yes
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 15
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 Yes
Full support Yes
Full support Yes
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
Samsung Internet Android Full support 4.0
Full support 4.0
Full support Yes
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.

See also