The updateTiming() method of the AnimationEffect interface updates the specified timing properties for an animation effect.

timing Optional

An object containing zero or more of the properties from the return value of AnimationEffect.getTiming(), representing the timing properties to update.

None (undefined).

TypeError

Thrown if invalid values are provided for any of the timing properties.

Side effects

updateTiming() may cause any associated Animation to start or stop playing, if for example the effect of a running animation is shortened such that its end time is before Animation.currentTime or the effect of a finished animation is lengthened such that its end time is after Animation.currentTime.

const animation = document.body.animate([], { duration: 1000 });
animation.finish();
console.log(animation.playState); // finished
animation.effect.updateTiming({ duration: 2000 });
console.log(animation.playState); // running

• Web Animations API
• AnimationEffect
• Animation
• AnimationEffect.getTiming()
• AnimationEffect.getComputedTiming()