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"TypeError: oldState is null" occurred when the timeline scrubber of CSS transition animation is moved by mouse

NEW
Unassigned

Status

()

Firefox
Developer Tools: Animation Inspector
P2
normal
2 years ago
2 years ago

People

(Reporter: daisuke, Unassigned)

Tracking

Firefox Tracking Flags

(Not tracked)

Details

(Whiteboard: [btpp-fix-later])

Attachments

(1 attachment)

(Reporter)

Description

2 years ago
Created attachment 8734238 [details]
transition.html

The actual error message was,
JavaScript error: resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/animation.js, line 293: TypeError: oldState is null

I attach a sample html.
Thanks for filing this Daisuke. I had seen this too.
I believe this does not cause the timeline to break, but we should still investigate and fix this issue.
Triaging this as a P2.
Priority: -- → P2
Whiteboard: [btpp-fix-later]
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