elapsedTime property

num elapsedTime

The amount of time the animation has been running, in seconds, when this event fired, excluding any time the animation was paused.

For an animationstart event, elapsedTime is 0.0 unless there was a negative value for animation-delay, in which case the event will be fired with elapsedTime containing (-1 * delay).

See developer.mozilla.org/en-US/docs/Web/API/AnimationEvent/elapsedTime

Implementation

external num get elapsedTime;