fix(tsconfig): optimize TsconfigPathsPlugin and fix extends resolution bugs#483
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…n bugs Perf/cleanup: - Remove redundant slice in getPrefixLength (return indexOf result directly) - Precompute allContexts in _loadTsconfigPathsMap to avoid per-call object rebuild - Parallelize _loadTsconfigReferences with Promise.all instead of sequential await Bug fixes: - Fix baseUrl inheritance from deep extends chains: use dirname(extendedConfigPath) (absolute) instead of dirname(extendedConfigValue) (relative), so non-sibling directory structures resolve correctly - Fix scoped npm package extends (@scope/name): add fallback to resolve node_modules/@scope/name/tsconfig.json when node_modules/@scope/name.json is not found Add test fixtures and cases covering both bug scenarios. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #483 +/- ##
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+ Coverage 93.40% 93.42% +0.02%
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Files 50 50
Lines 2502 2511 +9
Branches 759 766 +7
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+ Hits 2337 2346 +9
Misses 136 136
Partials 29 29
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alexander-akait
approved these changes
Mar 16, 2026
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Summary
Perf/cleanup:
Bug fixes:
extendsdoes not resolve Node.js style specifiers microsoft/TypeScript#62753Add test fixtures and cases covering both bug scenarios.
What kind of change does this PR introduce?
fix
Did you add tests for your changes?
Yes
Does this PR introduce a breaking change?
No
If relevant, what needs to be documented once your changes are merged or what have you already documented?
Nothing
Use of AI
Partial