1183521 - Animation.effect should return the same object even after an animation is updated

Status: RESOLVED INVALID

(Core :: DOM: Animation, defect)

Description

[Brian Birtles (:birtles)]

Although I haven't verified this, I'm pretty sure that this currently happens:

  elem.style.animation = "anim 10s";
  var anim = elem.getAnimations()[0];
  var effect = anim.effect;
  elem.style.animation = "anim 10s forwards";
  console.log(anim === elem.getAnimations()[0]); // Displays "true"
  console.log(effect === elem.getAnimations()[0].effect); // Displays "false"

Before we go extending the KeyframeEffect(ReadOnly) interface too much, we should probably fix the object identity issue.

Comment 1

[Brian Birtles (:birtles)]

Actually, I think this might be invalid. I think we *do* preserve the existing effect.

Comment 2

[Brian Birtles (:birtles)]

I tested locally and this works. There's even a comment in the code mentioning that we take care of this.

Comment 3

[Brian Birtles (:birtles)]

Attachment: Test case

For reference, here is the test I used to verify this.