Background-position fails to animate under special circumstances
Categories
(Core :: CSS Transitions and Animations, defect)
Tracking
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| Tracking | Status | |
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| firefox-esr60 | --- | unaffected |
| firefox64 | --- | wontfix |
| firefox65 | --- | fixed |
| firefox66 | --- | fixed |
People
(Reporter: cers, Assigned: jwatt)
References
Details
(Keywords: regression)
Attachments
(1 file)
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(deleted),
text/html
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Details |
First discovered here: https://twitter.com/anatudor/status/1083816059751284736
Under very specific circumstances, background-position fails to animate.
Curiously, it animates properly if you click (and hold) somewhere inside the document and move your mouse continuously.
STR:
- Load attached test case
What should happen:
You should see two squares with animating backgrounds, the bottom one slightly masked.
What happens:
Unmasked square animates correctly, masked one doesn't animate at all.
I've tracked the regression via mozregression to https://hg.mozilla.org/integration/mozilla-inbound/rev/d2218beee052 landed in bug 1494092.
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Updated•6 years ago
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Assignee | |
Comment 1•6 years ago
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Thanks for the bug report, and especially the reduced testcase!
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Comment 2•6 years ago
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Hmm, this seems to work with WebRender... that's weird.
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Reporter | |
Comment 3•6 years ago
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(In reply to Emilio Cobos Álvarez (:emilio) from comment #2)
Hmm, this seems to work with WebRender... that's weird.
I don't know if it's related, but the original example from twitter fails differently in WebRender.
The background animation seems to work as intended, but the rotation is wonky.
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Updated•6 years ago
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Updated•6 years ago
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Updated•6 years ago
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Description
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