This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The getKeyframes() method of a KeyframeEffect returns an Array of the computed keyframes that make up this animation along with their computed offsets.


var keyframes = keyframeEffect.getKeyframes();



Return value

Returns a sequence of objects with the following format:

property value pairs

As many property value pairs as are contained in each keyframe of the animation.


The offset of the keyframe specified as a number between 0.0 and 1.0 inclusive or null. This is equivalent to specifying start and end states in percentages in CSS stylesheets using @keyframes. This will be null if the keyframe is automatically spaced using KeyframeEffect.spacing.


The computed offset for this keyframe, calculated when the list of computed keyframes was produced according to KeyframeEffect.spacing. Unlike offset, above, the computedOffset is never null.


The timing function used from this keyframe until the next keyframe in the series.


The KeyframeEffect.composite operation used to combine the values specified in this keyframe with the underlying value. This will be absent if the composite operation specified on the effect is being used.


In the Red Queen Race example, we can inspect Alice and the RedQueen's animation to see its individual keyframes like so:

// Return the array of keyframes



Specification Status Comment
Web Animations
The definition of 'KeyframeEffect.getKeyframes()' in that specification.
Working Draft Editor's draft.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
getKeyframesChrome ? Edge ? Firefox Full support 63IE No support NoOpera No support NoSafari No support NoWebView Android ? Chrome Android ? Firefox Android Full support 63Opera Android No support NoSafari iOS No support NoSamsung Internet Android ?


Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown

See also