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 compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support39 ?34 No26 No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support6161 ?3426 No No

See also