Open
Bug 1875557
Opened 2 years ago
Updated 29 days ago
Incorrect z-index calculated using css variable
Categories
(Core :: CSS Parsing and Computation, defect)
Tracking
()
UNCONFIRMED
People
(Reporter: 709922234, Unassigned)
References
Details
Attachments
(1 file)
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605.02 KB,
image/png
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Details |
Screenshot 2024-01-20 at 06.49.23.png
User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:123.0) Gecko/20100101 Firefox/123.0
Steps to reproduce:
https://codepen.io/mantou132/pen/MWxmRJd?editors=1100
Actual results:
Not all red squares are on top
Expected results:
red square on top of yellow square
Component: Untriaged → DOM: CSS Object Model
Product: Firefox → Core
When I changed the CSS variable value to a smaller number, the red could cover the yellow square again, so I found a critical value of 67108666, below which it is normal. However, this threshold only works on my website and no longer works in this codepen example
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Updated•2 years ago
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Component: DOM: CSS Object Model → Layout
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Comment 2•2 years ago
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Could be related to 32-bit integer overflow and/or limited precision of a floating-point representation of the value.
Severity: -- → S3
Component: Layout → CSS Parsing and Computation
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Description
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