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This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.


The Animation.effect property of the Web Animations API gets and sets the target effect of an animation. The target effect may be either an effect object of a type based on AnimationEffectReadOnly, such as KeyframeEffect, or null.


var effect = Animation.effect;

Animation.effect = AnimationEffectReadOnly


A AnimationEffectReadOnly object describing the target animation effect for the animation, or null to indicate no active effect.

Specification Status Comment
Web Animations
The definition of 'Animation.effect' in that specification.
Working Draft Editor's draft.

Browser compatibility

Feature Chrome Firefox (Gecko) Microsoft Edge Internet Explorer Opera Safari (WebKit)
Basic support No support 48 (48)[1][2] ? No support No support No support
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support No support 48.0 (48)[1][2] No support No support No support

[1] The Web Animations API is only enabled by default in Firefox Developer Edition and Nightly builds. You can enable it in beta and release builds by setting the preference dom.animations-api.core.enabled to true, and can disable it in any Firefox version by setting this preference to false.

[2] This property is supported in Firefox 48 but is read-only. It became writable in Firefox 51.

See also

Document Tags and Contributors

 Contributors to this page: Sheppy, birtles, chrisdavidmills, rachelnabors
 Last updated by: Sheppy,