release(crates): v0.48.2

[oxc-bot]

[0.48.2] - 2025-02-02

Features

• 86b6219 mangler: Use characters in the order of their likely frequency (feat(mangler): use characters in the order of their likely frequency #8771) (sapphi-red)
• d553318 minifier: Complete MangleIf (feat(minifier): complete MangleIf #8810) (Boshen)
• 5cfea76 minifier: Compress (a = _a) != null ? a : b and (a = _a) != null ? a.b() : undefined (feat(minifier): compress (a = _a) != null ? a : b and (a = _a) != null ? a.b() : undefined #8823) (sapphi-red)
• f02d9e9 minifier: Merge single var declarations without init into for-of (feat(minifier): merge single var declarations without init into for-of #8813) (sapphi-red)
• 99b47ed minifier: Merge single var declarations without init into for-in (feat(minifier): merge single var declarations without init into for-in #8812) (sapphi-red)
• d9f1d0d minifier: Merge expressions in for-in statement head (feat(minifier): merge expressions in for-in statement head #8811) (sapphi-red)
• 18f1b15 minifier: Implement known method Array.of (feat(minifier): implement known method Array.of #8805) (7086cmd)
• e525e60 minifier: Compress a != null ? a.b : undefined to a?.b (feat(minifier): compress a != null ? a.b : undefined to a?.b #8802) (feat(minifier): compress a != null ? a.b : undefined to a?.b (#8802) #8808) (Boshen)
• e353a01 minifier: Compress a != null ? a.b : undefined to a?.b (feat(minifier): compress a != null ? a.b : undefined to a?.b #8802) (sapphi-red)
• 72d74a2 minifier: Compress a != null ? a : b into a ?? b (feat(minifier): compress a != null ? a : b into a ?? b #8801) (sapphi-red)
• 249895f minifier: Implement variadic Math methods in known methods (feat(minifier): implement variadic Math methods in known methods #8783) (Ethan Goh)
• 7ea99f4 minifier: Compress array of string literals to 'str1,str2'.split(',') (feat(minifier): compress array of string literals to 'str1,str2'.split(',') #8786) (sapphi-red)
• 6c627df minifier: Implement unary Math functions in known methods (feat(minifier): implement unary Math functions in known methods #8781) (7086cmd)
• ad14403 minifier: Compress typeof a.b === 'undefined' to a.b === void 0 (feat(minifier): compress typeof a.b === 'undefined' to a.b === void 0 #8751) (sapphi-red)
• f7f2d2f minifier: Compress a == null && b to a ?? b when return value is ignored (feat(minifier): compress a == null && b to a ?? b when return value is ignored #8749) (sapphi-red)
• 3c1c92c minifier: Support a[0] and this.a in has_no_side_effect_for_evaluation_same_target (feat(minifier): support a[0] and this.a in has_no_side_effect_for_evaluation_same_target #8748) (sapphi-red)
• 29417dd minifier: Minimize !(a, b) -> a, !b (feat(minifier): minimize !(a, b) -> a, !b #8746) (Boshen)
• 3ece991 minifier: Remove unused import.meta statement (feat(minifier): remove unused import.meta statement #8744) (Boshen)
• 3ef980a minifier: Remove unreachable statements after break and continue (feat(minifier): remove unreachable statements after break and continue #8743) (Boshen)
• 256ae78 semantic: Report error for empty JSX attribute expression (feat(semantic): report error for empty JSX attribute expression #8815) (Dunqing)
• 3bc05fa transformer: Implement jsx spread child (feat(transformer): implement jsx spread child #8763) (Boshen)

Bug Fixes

• 0928a19 codegen: Emit this parameters of class methods (fix(codegen): Emit this parameters of class methods #8834) (michaelm)
• 831928d minifier: Mark as changed when else if was converted to if (fix(minifier): mark as changed when else if was converted to if #8837) (翠 / green)
• f8548ec minifier: Unreachable error when compressing string literal arrays with .split() (fix(minifier): unreachable error when compressing string literal arrays with .split() #8806) (sapphi-red)
• 2eac9c0 minifier: Fix var undefined = 1; foo === null || foo === undefined should not be compressed (fix(minifier): fix var undefined = 1; foo === null || foo === undefined should not be compressed #8803) (sapphi-red)
• ae7f670 minifier: Avoid minifying +void unknown to NaN and fix typo (fix(minifier): avoid minifying +void unknown to NaN and fix typo #8784) (7086cmd)
• 8781537 minifier: { let foo; const bar = undefined; } -> { let foo, bar; } (fix(minifier): { let foo; const bar = undefined; } -> { let foo, bar; } #8764) (Boshen)
• 8a6ae8a minifier: Do not change const to let if assignment to constant variable. (fix(minifier): do not change const to let if assignment to constant variable. #8761) (Boshen)
• 66c33ed minifier: Remove incorrect not + conditional expression compression (fix(minifier): remove incorrect not + conditional expression compression #8759) (翠 / green)
• a3b078a minifier: Fix crash with []['concat'](1) (fix(minifier): fix crash with []['concat'](1) #8750) (sapphi-red)

Performance

• d8fac6d codegen: Avoid a heap allocation when printing floats (perf(codegen): avoid a heap allocation when printing floats #8807) (Boshen)
• 2e4ff91 manger: Revert "perf(manger): remove useless tmp_bindings (perf(manger): remove useless tmp_bindings #8735)" (perf(manger): Revert "perf(manger): remove useless tmp_bindings (#8735)" #8741) (Dunqing)

Documentation

• 57b7ca8 ast: Add documentation for all remaining JS AST methods (docs(ast): add documentation for all remaining JS AST methods #8820) (Cam McHenry)
• b00b8c8 ast: Correct documentation for JSXExpression::EmptyExpression (docs(ast): correct documentation for JSXExpression::EmptyExpression  #8816) (Dunqing)
• c63291a ast: Add more docs for JS expressions, declarations, and module AST types (docs(ast): add more docs for JS expressions, declarations, and module AST types #8800) (Cam McHenry)
• fb5b1fa ast: Reformat AstBuilder doc comments (docs(ast): reformat AstBuilder doc comments #8774) (overlookmotel)

Refactor

• 0568210 ast: Remove excess line breaks from generated code (refactor(ast): remove excess line breaks from generated code #8830) (overlookmotel)
• 30eec26 ast: Make generated code for Visit more understandable (refactor(ast): make generated code for Visit more understandable #8825) (overlookmotel)
• d4eee50 ast: Comments for enums with no AstKind in generated code for Visit trait (refactor(ast): comments for enums with no AstKind in generated code for Visit trait #8796) (overlookmotel)
• 87a7711 ast: Shorten generated code for VisitMut (refactor(ast): shorten generated code for VisitMut #8795) (overlookmotel)
• 70ad879 ast: Remove unnecessary lint from generated code for AstKind (refactor(ast): remove unnecessary lint from generated code for AstKind #8794) (overlookmotel)
• beeda9a ast: Alter comments in generated Visit trait (refactor(ast): alter comments in generated Visit trait #8793) (overlookmotel)
• 8cf9d34 ast: Rename #[estree(type)] attr on struct fields to #[estree(ts_type)] (refactor(ast): rename #[estree(type)] attr on struct fields to #[estree(ts_type)] #8767) (overlookmotel)
• a316b10 ast: Rename #[estree(type)] attr on types to #[estree(rename)] (refactor(ast): rename #[estree(type)] attr on types to #[estree(rename)] #8766) (overlookmotel)
• 6aa2dde codegen: Accept SymbolTable instead of Mangler (refactor(codegen): accept SymbolTable instead of Mangler #8829) (Daniel Bulant)
• 3abf2f7 minifier: Extract extract_id_or_assign_to_id method (refactor(minifier): extract extract_id_or_assign_to_id method #8822) (sapphi-red)
• a861d93 minifier: Port esbuild's mangleStmts (refactor(minifier): port esbuild's mangleStmts #8770) (Boshen)
• 0fcff20 minifier: Remove EmptyStatement in a single place (refactor(minifier): remove EmptyStatement in a single place #8745) (Boshen)

Testing

• ad35e82 linter: Use snapshot testing instead of LintResult (test(linter): use snapshot testing instead of LintResult #8711) (Sysix)
• dc4c388 minifier: Fail tests when parse fails (test(minifier): fail tests when parse fails #8836) (sapphi-red)
• 3ac5020 minifier: Enable more passed esbuild tests (test(minifier): enable more passed esbuild tests #8804) (Boshen)
• 0c4c739 minifier: Cleanup some tests in substitute_alternate_syntax (test(minifier): cleanup some tests in substitute_alternate_syntax #8768) (sapphi-red)
• 79d5481 minifier: Add and enable some tests in fold_constants (test(minifier): add and enable some tests in fold_constants #8769) (sapphi-red)
• ef55e7c minifier: Check idempotency for all tests (test(minifier): check idempotency for all tests #8754) (Boshen)
• d072f09 minifier: Enable more ignored tests (test(minifier): enable more ignored tests #8753) (Boshen)
• e78e468 minifier: Cleanup some tests in minimize_conditions (test(minifier): cleanup some tests in minimize_conditions #8752) (sapphi-red)

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[github-actions]

Monitor Oxc

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

[codspeed-hq]

CodSpeed Performance Report

Merging #8838 will not alter performance

_{Comparing release/crates-1738488873 (92891c1) with main (d553318)}

Summary

✅ 33 untouched benchmarks