AnimationPlaybackEvent: currentTime property
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 20 µs in Firefox 59; in 60, it will be 2 ms.
js
// 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 |
---|
Web Animations # dom-animationplaybackevent-currenttime |
Browser compatibility
BCD tables only load in the browser