AnimationPlaybackEvent: currentTime property
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since March 2020.
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 2ms. You can also enable privacy.resistFingerprinting
, in which case the precision will be 100ms or the value of privacy.resistFingerprinting.reduceTimerPrecision.microseconds
, whichever is larger.
For example, with reduced time precision, the result of playbackEvent.currentTime
will always be a multiple of 0.002, or a multiple of 0.1 (or privacy.resistFingerprinting.reduceTimerPrecision.microseconds
) with privacy.resistFingerprinting
enabled.
// reduced time precision (2ms) in Firefox 60
playbackEvent.currentTime;
// Might be:
// 23.404
// 24.192
// 25.514
// …
// reduced time precision with `privacy.resistFingerprinting` enabled
playbackEvent.currentTime;
// Might be:
// 49.8
// 50.6
// 51.7
// …
Specifications
Specification |
---|
Web Animations # dom-animationplaybackevent-currenttime |
Browser compatibility
BCD tables only load in the browser