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AnimationTimeline.currentTime

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

The currentTime read-only property of the Web Animations API's AnimationTimeline interface returns the timeline's current time in milliseconds, or null if the timeline is inactive.

Syntax

var currentTime = AnimationTimeline.currentTime;

Value

A number representing the timeline's current time in milliseconds, or null if the timeline is inactive.

Reduced time precision

To offer protection against timing attacks and fingerprinting, the precision of animationTimeline.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
animationTimeline.currentTime;
// 23.404
// 24.192
// 25.514
// ...


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

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

Specifications

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

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	39	?	63 Disabled 63 Disabled Disabled From version 63: this feature is behind the `dom.animations-api.timelines.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config. 48 — 63 Disabled Disabled From version 48 until version 63 (exclusive): this feature is behind the `dom.animations-api.core.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	No	26	No

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	61	61	?	63 Disabled 63 Disabled Disabled From version 63: this feature is behind the `dom.animations-api.timelines.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config. 48 — 63 Disabled Disabled From version 48 until version 63 (exclusive): this feature is behind the `dom.animations-api.core.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	26	No	No

AnimationTimeline.currentTime

Syntax

Value

Reduced time precision

Specifications

Browser compatibilityUpdate compatibility data on GitHub

See also