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Keep the syntax-support assertion for 1e9%, but omit its exact computed-value assertion. CSS Values allows implementation-specific numeric limits: Chromium and WebKit clamp this value to 8191.75%, and Firefox clamps it to 1000%. The old expectation also used scientific notation, contrary to CSSOM number serialization. Ordinary percentages retain their exact computed-value checks. https://drafts.csswg.org/css-values-4/#numeric-types https://drafts.csswg.org/cssom/#serialize-a-css-component-value Co-authored-by: codex <codex@openai.com>
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October 25, 2026 11:36
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Keep the syntax-support assertion for 1e9%, but omit its exact computed-value assertion. CSS Values allows implementation-specific numeric limits: Chromium and WebKit clamp this value to 8191.75%, and Firefox clamps it to 1000%. The old expectation also used scientific notation, contrary to CSSOM number serialization. Ordinary percentages retain their exact computed-value checks.
https://drafts.csswg.org/css-values-4/#numeric-types https://drafts.csswg.org/cssom/#serialize-a-css-component-value