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.
AnimationTimeline interface of the Web Animations API represents the timeline of an animation. This interface exists to define timeline features (inherited by
DocumentTimeline and future timeline types) and is not itself directly used by developers. Anywhere you see
AnimationTimeline, you should use
DocumentTimeline or any other timeline type instead.
- Returns the time value in milliseconds for this timeline or
nullif this timeline is inactive.
The definition of 'AnimationTimeline' in that specification.
|Working Draft||Editor's draft.|
|Feature||Chrome||Firefox (Gecko)||Internet Explorer||Opera||Safari (WebKit)|
|Basic support||No support||48 (48)||No support||No support||No support|
|Feature||Android||Android Webview||Firefox Mobile (Gecko)||Firefox OS||IE Mobile||Opera Mobile||Safari Mobile||Chrome for Android|
|Basic support||No support||No support||48.0 (48)||No support||No support||No support||No support||No support|
 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
true, and can disable it in any Firefox version by setting this preference to