Web/API/AnimationPlaybackEvent/currentTime

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

The currentTime read-only property of the AnimationPlaybackEvent interface represents the current time of the animation that generated the event at the moment the event is queued. This will be unresolved if the animation was idle at the time the event was generated.

Value

A number representing the current time in milliseconds, or null.

Reduced time precision

To offer protection against timing attacks and fingerprinting, the precision of playbackEvent.currentTime might get rounded depending on browser settings. In Firefox, the privacy.reduceTimerPrecision preference is enabled by default and defaults to 20us in Firefox 59; in 60 it will be 2ms.

// reduced time precision (2ms) in Firefox 60
playbackEvent.currentTime;
// 23.404
// 24.192
// 25.514
// ...


// reduced time precision with `privacy.resistFingerprinting` enabled
playbackEvent.currentTime;
// 49.8
// 50.6
// 51.7
// ...

In Firefox, you can also enabled privacy.resistFingerprinting, the precision will be 100ms or the value of privacy.resistFingerprinting.reduceTimerPrecision.microseconds, whichever is larger.

Specifications

Specification	Status	Comment
Web AnimationsThe definition of 'AnimationPlaybackEvent.currentTime' in that specification.	Working Draft	Editor's draft.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`currentTime` Experimental'	Chrome No support No	Edge No support No	Firefox Full support 42	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 42	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No

Legend

Full support: Full support
No support: No support
Experimental. Expect behavior to change in the future.': Experimental. Expect behavior to change in the future.