release(crates): v0.83.0

[oxc-bot]

[0.83.0] - 2025-08-29

💥 BREAKING CHANGES

• 34d0a01 napi/minify,transform: [BREAKING] Change module type to ESM (feat(napi/minify,transform)!: change module type to ESM #13349) (Boshen)
• e459866 ecmascript: [BREAKING] Remove PropertyReadSideEffects::OnlyMemberPropertyAccess (refactor(ecmascript)!: remove PropertyReadSideEffects::OnlyMemberPropertyAccess #13348) (sapphi-red)

🚀 Features

• 903a150 parser: Report more invalid modifier locations (feat(parser): report more invalid modifier locations #13368) (Ulrich Stark)
• a40140a minifier: Use is_literal_value in substitute_single_use_symbol_in_expression (feat(minifier): use is_literal_value in substitute_single_use_symbol_in_expression #13364) (sapphi-red)
• ac2067b ecmascript: Examine and improve is_literal_value (feat(ecmascript): examine and improve is_literal_value #13363) (sapphi-red)
• 56d2da3 minifier: Inline top-level variables for module scripts (feat(minifier): inline top-level variables for module scripts #13361) (sapphi-red)
• 9a828de semantic: Derive Default for Semantic (feat(semantic): derive Default for Semantic #13343) (overlookmotel)
• bb10c88 ast_visit: Add Utf8ToUtf16Converter::convert_program method (feat(ast_visit): add Utf8ToUtf16Converter::convert_program method #13341) (overlookmotel)
• 59d2c08 ast_visit: Utf8ToUtf16 translate back from UTF-16 to UTF-8 (feat(ast_visit): Utf8ToUtf16 translate back from UTF-16 to UTF-8 #13340) (overlookmotel)
• 593f54c minifier: Add --max-iterations for debugging (feat(minifier): add --max-iterations for debugging #13291) (sapphi-red)
• a0e0a91 oxc_minify_napi: Expose CodeGenOptions (feat(oxc_minify_napi): expose CodeGenOptions #13288) (sapphi-red)
• a08dd5a minifier: Merge assignments in sequence exprs to variable declaration (feat(minifier): merge assignments in sequence exprs to variable declaration #13270) (sapphi-red)
• a19e84f minifier: Merge assignment to variable declaration (feat(minifier): merge assignment to variable declaration #13269) (sapphi-red)
• 07afa70 minifier: Support remaining expressions for single use variable inlining (feat(minifier): support remaining expressions for single use variable inlining #13280) (sapphi-red)
• 8e34656 ecmascript: Implement MayHaveSideEffects for AssignmentTarget (feat(ecmascript): implement MayHaveSideEffects for AssignmentTarget #13279) (sapphi-red)
• a951eee minifier: Support more statements for single use variable inlining (feat(minifier): support more statements for single use variable inlining #13277) (sapphi-red)
• dcda3a2 minifier: Support more expressions for single use variable inlining (feat(minifier): support more expressions for single use variable inlining #13276) (sapphi-red)
• 66d6005 minifier: Implement basic single use variable inlining (feat(minifier): implement basic single use variable inlining #13275) (sapphi-red)
• 53f55a4 minifier: Remove unnecessary parenthesis from nested optional chaining (feat(minifier): remove unnecessary parenthesis from nested optional chaining #13268) (sapphi-red)
• 8ca9909 minifier: Remove unused assignments for vars (feat(minifier): remove unused assignments for vars #13231) (sapphi-red)
• cae222c minifier: Compress return void foo() => foo(); return (feat(minifier): compress return void foo() => foo(); return #13271) (sapphi-red)
• a1b6ad4 minifier: Implement known methods Math.clz32 and Math.imul (feat(minifier): implement known methods Math.clz32 and Math.imul #12405) (Ethan Wu)

🐛 Bug Fixes

• c900b3e transformer/styled-components: Remove more escaped line breaks in CSS minification (fix(transformer/styled-components): remove more escaped line breaks in CSS minification #13380) (overlookmotel)
• 6dc5b70 transformer/styled-components: Remove unnecessary whitespace around block comments in CSS minification (fix(transformer/styled-components): remove unnecessary whitespace around block comments in CSS minification #13379) (overlookmotel)
• 5a25c06 transformer/legacy-decorator: Simplify enum type inference (fix(transformer/legacy-decorator): simplify enum type inference #13357) (overlookmotel)
• 1fca9b8 transformer/styled-components: Remove trailing whitespace in CSS minification (fix(transformer/styled-components): remove trailing whitespace in CSS minification #13376) (overlookmotel)
• df38b2c transformer/styled-components: Remove space before line comment in CSS minification (fix(transformer/styled-components): remove space before line comment in CSS minification #13371) (overlookmotel)
• a7a06b7 transformer/styled-components: Fix block comment containing expression in CSS minification (fix(transformer/styled-components): fix block comment containing expression in CSS minification #13370) (overlookmotel)
• 35d83ca transformer/styled-components: Remove repeat whitespace in CSS minification (fix(transformer/styled-components): remove repeat whitespace in CSS minification #13369) (overlookmotel)
• 72468f9 minifier: Keep variables that are modified by typeof foo === 'object' && foo !== null compression (2) (fix(minifier): keep variables that are modified by typeof foo === 'object' && foo !== null compression (2) #13362) (sapphi-red)
• b53a294 codegen: Add end sourcemaps for arguments (fix(codegen): add end sourcemaps for arguments #13355) (sapphi-red)
• 1044566 codegen: Add end sourcemaps for array literals and object literals (fix(codegen): add end sourcemaps for array literals and object literals #13354) (sapphi-red)
• 7aff3b6 transformer/styled-components: Preserve spaces between consecutive interpolations in CSS minification (fix(transformer/styled-components): preserve spaces between consecutive interpolations in CSS minification #13346) (Dunqing)
• 24fee15 transformer/legacy-decorator: Emit correct metadata types for enum (fix(transformer/legacy-decorator): emit correct metadata types for enum #13327) (Dunqing)
• 8a43068 semantic: Allow super in object method in js but not in ts (fix(semantic): allow super in object method in js but not in ts #13318) (Boshen)
• 1cdc420 ast_visit: Correct and expand comments in Utf8ToUtf16Converter (fix(ast_visit): correct and expand comments in Utf8ToUtf16Converter #13310) (overlookmotel)
• 45e0cd9 oxc_transformer_plugins: Replace_global_define plugin postfix_wildcard should only match one property (fix(oxc_transformer_plugins): replace_global_define plugin postfix_wildcard should only match one property #13307) (IWANABETHATGUY)
• 5d898e8 ecmascript: Treat shadowed global calls correctly (fix(ecmascript): treat shadowed global calls correctly #13292) (sapphi-red)
• 87e68b5 minifier: Keep variables that are modified by typeof foo === 'object' && foo !== null compression (fix(minifier): keep variables that are modified by typeof foo === 'object' && foo !== null compression #13290) (sapphi-red)
• 0e804aa minifier: Keep variables that are modified by combined assignments made by minification (fix(minifier): keep variables that are modified by combined assignments made by minification #13267) (sapphi-red)
• 6003285 minifier: Keep property access before call expressions as-is to preserve this value (fix(minifier): keep property access before call expressions as-is to preserve this value #13278) (sapphi-red)

🚜 Refactor

• be6677e transformer/styled-components: Clarify whitespace removal logic in CSS minification (refactor(transformer/styled-components): clarify whitespace removal logic in CSS minification #13375) (overlookmotel)
• cd5a9ca ast_visit: Utf8ToUtf16 record end offset of multi-byte chars (refactor(ast_visit): Utf8ToUtf16 record end offset of multi-byte chars #13339) (overlookmotel)
• d787517 semantic: Store comments as a slice instead of &Vec (refactor(semantic): store comments as a slice instead of &Vec #13336) (overlookmotel)
• e7a49ed transformer/legacy-decorator: Eliminate unreliable identification of metadata (refactor(transformer/legacy-decorator): eliminate unreliable identification of metadata #13227) (Dunqing)
• 66a5673 ecmascript: Add ToUint32 trait (refactor(ecmascript): add ToUint32 trait #13272) (sapphi-red)

⚡ Performance

• d7c9169 minifier: Exit early in is_closest_function_scope_an_async_generator (perf(minifier): exit early in is_closest_function_scope_an_async_generator #13273) (sapphi-red)

🧪 Testing

• d0f1d63 minifier: Share test helper functions between unit tests and integration tests (test(minifier): share test helper functions between unit tests and integration tests #13360) (sapphi-red)
• f547c94 codegen: Add test that verifies stack traces are correct (test(codegen): add test that verifies stack traces are correct #13351) (sapphi-red)

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[github-actions]

Monitor Oxc

suite	result
(compressor)	❌
Isolated Declarations	❌
(dce)	❌
(codegen)	❌
(transformer)	❌
(mangler)	❌
(whitespace)	❌

[codspeed-hq]

CodSpeed Instrumentation Performance Report

Merging #13387 will degrade performances by 11.21%

_{Comparing release/crates-1756447539 (a4e41c0) with main (5c24e4d)¹}

Summary

❌ 1 regressions
✅ 37 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
❌	mangler[cal.com.tsx]	3.4 ms	3.8 ms	-11.21%

Footnotes

1. No successful run was found on main (47e6df5) during the generation of this report, so 5c24e4d was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩