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fix: deduplicate mask image prefixes - #8

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intellild merged 3 commits into
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codex/dedupe-mask-prefixes
Oct 22, 2026
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intellild merged 3 commits into
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codex/dedupe-mask-prefixes

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Ports parcel-bundler/lightningcss#1339. Preserves both original upstream commits with their original SHAs and authors, then adds a merge commit integrating rstackjs master (5aec9d4).

Remove duplicate prefix flags while emitting consecutive mask-image fallbacks with matching values, retaining declaration position and cascade behavior across different values and intervening properties.

For example, targeting Chrome 90 for -webkit-mask-image: var(--image); mask-image: var(--image) previously emitted two identical -webkit-mask-image declarations. Emit one prefixed declaration followed by the unprefixed declaration.

Validation on the resulting tree:

  • cargo test --all-features --locked: passed, including integration tests and doctests.
  • cargo fmt --all -- --check and git diff --check: passed.

by OpenAI Codex

SyMind and others added 3 commits September 8, 2026 16:36
Preserve the original commits from parcel-bundler#1339.
Integrate the change with rstackjs/lightningcss master (5aec9d4),
retaining the fork package configuration and existing regression tests.
@chatgpt-codex-connector

chatgpt-codex-connector Bot commented Oct 22, 2026 •

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Codex Review Summary

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Review Status Commit Review trigger
📝 Code Review ✅ Completed 2026-10-22T03:02:27.862197Z 88997e9 PR opened
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@codspeed

codspeed Bot commented Oct 22, 2026

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Merging this PR will not alter performance

✅ 8 untouched benchmarks


Comparing codex/dedupe-mask-prefixes (88997e9) with master (5aec9d4)

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@intellild
intellild merged commit a3cf0d9 into master Oct 22, 2026
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2 participants