[0.54.0] - 2025-03-04

• 098f652 codegen: [BREAKING] Add CommentAnnotation to avoid parsing comments again (perf(codegen)!: add CommentAnnotation to avoid parsing comments again #9506) (Boshen)

• a8d1d48 parser,codegen: [BREAKING] Parse and print#__NO_SIDE_EFFECTS__ (feat(parser,codegen)!: parse and print#__NO_SIDE_EFFECTS__ #9496) (Boshen)

• 355a4db napi/parser: [BREAKING] Remove parse_without_return API (feat(napi/parser)!: remove parse_without_return API #9455) (Boshen)

• a5cde10 visit_ast: [BREAKING] Add oxc_visit_ast crate (feat(visit_ast)!: add oxc_visit_ast crate #9428) (Boshen)

• abb15e0 ast: [BREAKING] Add pure field to Function, CallExpression, and NewExpression (feat(ast)!: add pure field to Function, CallExpression, and NewExpression #9207) (overlookmotel)

Features

• a9f0d2b ast_tools: Generate field offset assertions for more types (feat(ast_tools): generate field offset assertions for more types #9449) (overlookmotel)
• 64f4a82 ecmascript: Handle pure call expression in chain expressions (feat(ecmascript): handle pure call expression in chain expressions #9480) (sapphi-red)
• 32139d2 ecmascript: Support /* @__PURE__ */ in may_have_side_effects (feat(ecmascript): support /* @__PURE__ */ in may_have_side_effects #9409) (sapphi-red)
• f5453f6 minifier: Flatten spread args in new expressions (feat(minifier): flatten spread args in new expressions #9512) (sapphi-red)
• f8073f3 minifier: Support if with side effects in dead code elimination (feat(minifier): support if with side effects in dead code elimination #9502) (sapphi-red)
• 10eb8f7 minifier: Use remove_unused_expression in try_fold_sequence_expression in remove_dead_code (feat(minifier): use remove_unused_expression in try_fold_sequence_expression in remove_dead_code #9467) (sapphi-red)
• 70916db minifier: Remove unused expression in for init and update (feat(minifier): remove unused expression in for init and update #9466) (sapphi-red)
• 26fde56 minifier: Inline simple IIFEs in remove_unused_expression (feat(minifier): inline simple IIFEs in remove_unused_expression #9465) (sapphi-red)
• ec2193e minifier: Support extracting arguments in pure calls in remove_unused_expression (feat(minifier): support extracting arguments in pure calls in remove_unused_expression #9463) (sapphi-red)
• 007051c minifier: Compress a != null && a.b() to a?.b() in remove_unused_expression (feat(minifier): compress a != null && a.b() to a?.b() in remove_unused_expression #9459) (sapphi-red)
• 50fce20 minifier: Support binary expression in remove_unused_expression (feat(minifier): support binary expression in remove_unused_expression #9456) (sapphi-red)
• ed9ede3 minifier: Support conditional expression in remove_unused_expression (feat(minifier): support conditional expression in remove_unused_expression #9432) (sapphi-red)
• 3520538 minifier: Support object expression in remove_unused_expression (feat(minifier): support object expression in remove_unused_expression #9430) (sapphi-red)
• fb8a93d minifier: Improve array expression handling in remove_unused_expression (feat(minifier): improve array expression handling in remove_unused_expression #9427) (sapphi-red)
• ff477cd minifier: Support template literals in remove_unused_expression (feat(minifier): support template literals in remove_unused_expression #9426) (sapphi-red)
• 0d26113 minifier: Compress /* @__PURE__ */ a() ? b : b to b (feat(minifier): compress /* @__PURE__ */ a() ? b : b to b #9410) (sapphi-red)
• 68c77c8 napi/parser: Return semantic errors (feat(napi/parser): return semantic errors #9460) (Boshen)
• 7d7f16c parser: Apply pure to rhs of binary expression (feat(parser): apply pure to rhs of binary expression #9492) (Boshen)
• 2a08b14 parser: Support V8 intrinsics (feat(parser): support V8 intrinsics #9379) (injuly)
• 9b7017c parser,codegen: Pure annotations (feat(parser,codegen): pure annotations #9351) (Boshen)
• aa06932 transformer: Support ModuleRunnerTransform (feat(transformer): support ModuleRunnerTransform #9371) (Dunqing)

Bug Fixes

• 75f06ad codegen: Do not print comments when only annotation_comments is enabled (fix(codegen): do not print comments when only annotation_comments is enabled #9518) (Dunqing)
• f5bbd5d ecmascript: Fix toString for negative numbers (fix(ecmascript): fix toString for negative numbers #9508) (sapphi-red)
• d2cd975 ecmascript: Fix may_have_side_effects for ${a() === b} (fix(ecmascript): fix may_have_side_effects for ${a() === b} #9478) (sapphi-red)
• 584d847 ecmascript: Objects passed to template literals may have side effects (fix(ecmascript): objects passed to template literals may have side effects #9425) (sapphi-red)
• b371fdc estree/ast: Camel-case typeAnnotation field (fix(estree/ast): camel-case typeAnnotation field #9420) (overlookmotel)
• 1fff993 minifier: Correctly remove dead code in try with finally (fix(minifier): correctly remove dead code in try with finally #9503) (sapphi-red)
• 0b96ebe minifier: Don't inline IIFE with parameters (fix(minifier): don't inline IIFE with parameters #9477) (sapphi-red)
• 071c84c minifier: Skip try_fold_stmt_in_boolean_context on ExpressionStatement (fix(minifier): skip try_fold_stmt_in_boolean_context on ExpressionStatement #9458) (sapphi-red)
• 306284d minifier: Call mark_current_function_as_changed in remove_unused_expression (fix(minifier): call mark_current_function_as_changed in remove_unused_expression #9457) (sapphi-red)
• 9c6ae9f parser: @__NO_SIDE_EFFECTS only affects const variable decl (fix(parser): @__NO_SIDE_EFFECTS only affects const variable decl #9517) (Boshen)
• b7d5513 parser: Parse @__NO_SIDE_EFFECTS__ between export default and async function (fix(parser): parse @__NO_SIDE_EFFECTS__ between export default and async function #9514) (Boshen)
• 01de74c parser: Correctly fail parsing when parsing foo.bar?. (fix(parser): correctly fail parsing when parsing foo.bar?. #9499) (camc314)
• 58defe3 parser: Mark expression as pure in chain expression (fix(parser): mark expression as pure in chain expression #9479) (sapphi-red)
• 2a03689 parser: Mark expressions on the left side of logical and conditional expressions as pure (fix(parser): mark expressions on the left side of logical and conditional expressions as pure #9414) (sapphi-red)
• 7fde233 transformer/legacy-decorator: Incorrect check for potentially non-existent ident (fix(transformer/legacy-decorator): incorrect check for potentially non-existent ident #9491) (Dunqing)
• b4f050c transformer/legacy-decorator: Metadata incorrectly wrapped by decorateParam (fix(transformer/legacy-decorator): metadata incorrectly wrapped by decorateParam #9490) (Dunqing)
• 5f67fa9 transformer/optional-chaning: Keep this when transforming this.f?.() (fix(transformer/optional-chaning): keep this when transforming this.f?.() #9505) (camc314)

Performance

• 10e4431 ast/estree: Skip escaping identifiers (perf(ast/estree): skip escaping identifiers #9398) (overlookmotel)
• b0a0a82 ast/estree: Reduce overhead serializing static strings (perf(ast/estree): reduce overhead serializing static strings #9396) (overlookmotel)
• 27a8e50 isolated_declarations: Reserve sufficient capacity in statements Vec (perf(isolated_declarations): reserve sufficient capacity in statements Vec #9394) (overlookmotel)

Refactor

• 8916335 ast/estree: Convert enums with converters on variants (refactor(ast/estree): convert enums with converters on variants #9438) (overlookmotel)
• dcff40c ast_tools: Generate layout assertions in multiple crates (refactor(ast_tools): generate layout assertions in multiple crates #9448) (overlookmotel)
• 19c4835 codegen: Simplify printing comments between arguments in call-like expressions (refactor(codegen): simplify printing comments between arguments in call-like expressions #9501) (Dunqing)
• c880481 isolated_declarations: Rename var (refactor(isolated_declarations): rename var #9390) (overlookmotel)
• 37e41f0 isolated_declarations: Use aliases ArenaBox / ArenaVec (refactor(isolated_declarations): use aliases ArenaBox / ArenaVec #9389) (overlookmotel)
• bbb450c minifier: Move a != null && b -> a ?? b compression to remove_unused_expression (refactor(minifier): move a != null && b -> a ?? b compression to remove_unused_expression #9468) (sapphi-red)
• b93774c minifier: Move try_fold_iife to remove_unused_expression (refactor(minifier): move try_fold_iife to remove_unused_expression #9464) (sapphi-red)
• 96a9719 minifier: Use may_have_side_effects in remove_unused_expression (refactor(minifier): use may_have_side_effects in remove_unused_expression #9413) (sapphi-red)

Testing

• c187b11 ecmascript: Add comments and tests for cases where ToPropertyKey throws an error (test(ecmascript): add comments and tests for cases where ToPropertyKey throws an error #9429) (sapphi-red)
• d129055 napi: Add tests for worker threads (test(napi): add tests for worker threads #9408) (Boshen)
• 48d51e3 napi: Add tests for hashbang field (test(napi): add tests for hashbang field #9386) (overlookmotel)