crates.io · #4262 most downloaded on crates.io

swc_core

82.0.06.6M downloads/moswc-project/swc ↗New releases in your daily digest, changelog included.

TBD

Last release 2 days ago
06 Oct 2026
Ships on a steady schedule
a new release about every 9 days
Nearly every release is documented
notes for 58 of the last 60 stable releases
4 versions withdrawn
withdrawn after publishing
4 years old
1493 releases · first in 2022

Release timeline

1493 releases since 2022

20222023202420252026

20222026

One column per quarter.

Releases

82.0.06 Oct 2026
chore: Publish crates with swc_core v82.0.0
chore: Publish crates with swc_core v82.0.0
Open source →
Additional notes
Bug Fixes

(bindings) Fall back to a secure Windows profile cache (#12452) (2c0fb89)

(bindings) Allow opting out of Unix cache root security checks (#12469) (e87fa40)

(ci) Run main CodSpeed benchmarks after policy skips (1b6d869)

(cli) Resolve out-dir source map paths relative to output (#12481) (717914f)

(deps) Update cargo (#10278) (fc7a9e2)

(es/compat) Preserve consecutive loop labels (#12472) (28c3370)

(es/estree) Fix AST roundtrip bugs and implement missing conversions (#12440) (898b592)

BREAKING: fix AST roundtrip bugs and implement missing conversions (#12440)

(es/fixer) Preserve parentheses in JSX sequence expressions (#12485) (7a36735)

(es/preset-env) Lower for-await in native async functions (#12414) (2b3d306)

(react-compiler) Protect long call chains from stack overflow (#12473) (a19b101)

Direct unapproved contributors to open issues (#12479) (3fac5ec)

Features

(ci) Restrict pull requests to trusted contributors (#12463) (ee297d6)

Miscellaneous Tasks

(deps) Replace dependency babel-eslint with @babel/eslint-parser ^7.11.0 (#12456) (a933f98)

(deps) Replace dependency npm-run-all with npm-run-all2 ^5.0.0 (#12457) (98e6c6e)

(deps) Update npm (#12468) (7c75e36)

Performance

(es/compat) Skip empty block-scoping renames (#12478) (952db74)

(es/parser) Scan template literals with byte search (#12474) (3c46139)

Refactor

(es/parser) Isolate parser state and make grammar parameters explicit (#12425) (5898e8a)

Ci

Refresh CodSpeed main baseline (c19d531)

From the same repository

swc-project/swc

81.0.230 Sept 2026

chore: Publish crates with swc_core v81.0.2

chore: Publish crates with swc_core v81.0.2

Open source →

Additional notes

Bug Fixes

(swc_config) Show why an options object failed to deserialize (#12441) (e92460a)

Performance

(node) Optimize macOS native addon first load (#12436) (0b151bf)

Testing

(es/ast) Add missing ctxt field to jsx_element serde test (#12439) (7dc1796)

Open source →

81.0.129 Sept 2026

chore: Publish crates with swc_core v81.0.1

chore: Publish crates with swc_core v81.0.1

Open source →

Additional notes

Features

(es/minifier) Account for shorthand expansion when inlining (#12428) (bd4c573)

Open source →

81.0.027 Sept 2026

chore: Publish crates with swc_core v81.0.0

chore: Publish crates with swc_core v81.0.0

Open source →

Additional notes

Bug Fixes

(es/minifier) Avoid inline arrow with this when used as arg (#12409) (9de48a0)
(es/parser) Parse optional renamed Flow component parameters (#12410) (1dea7a6)
(html/minifier) Preserve adjacent script elements (#12411) (aea189d)
(html/parser) Preserve customizable select markup (#12413) (86d40bd)
(node) Repair native release verification and cache handling (#12415) (2b292c8)

Revert

(es/minifier) Revert #12384 (#12419) (763cc20)

Open source →

80.0.123 Sept 2026

chore: Publish crates with swc_core v80.0.1

chore: Publish crates with swc_core v80.0.1

Open source →

Additional notes

Bug Fixes

(bindings) Detect macOS ACLs with supported APIs (#12391) (a73ea68)
(es/lexer) Stop iteration when input is exhausted (#12388) (c392686)
(es/minifier) Preserve destructuring patterns with PURE-annotated initializers (#12386) (6ee2384)
(es/minifier) Mark properties assigned through destructuring targets as mutated (#12398) (42e4f7e)
(es/minifier) Keep function and class declarations whose self-reference is dropped (#12401) (cd25b14)
(es/parser) Support leading pipes in Flow match patterns (#12393) (3c381f4)
(es/parser) Allow escaped keywords as property names (#12358) (478aaee)
(nodejs) Complete Amaro REPL support APIs (#12395) (4b42cd5)

Performance

(swc_core) Deduplicate ICU dependencies (#12385) (53cb564)

Refactor

(es/minifier) Dead code (#12392) (bbdc059)

Open source →

80.0.017 Sept 2026

chore: Publish crates with swc_core v80.0.0

chore: Publish crates with swc_core v80.0.0

Open source →

Additional notes

Bug Fixes

(binding/node) Return an error when a file cannot be read instead of panicking (#12379) (d342acd)
(es/compat) Preserve array rest when lowering nested object rest (#12352) (9348083)
(es/minifier) Do not merge sequences across array spreads (#12375) (f145dfe)
(es/parser) Accept valid declare readonly field initializers (#12363) (3668176)
(es/parser) Preserve elisions in arrow binding patterns (#12366) (3b3689a)
(es/parser) Isolate constructor function contexts (#12367) (7954b2d)
(es/parser) Correctly round non-decimal numeric literals (#12370) (7636d01)
(es/parser) Allow string import and export names after type (#12371) (baf0ba6)
(es/parser) Preserve type references named asserts before line breaks (#12372) (1f12e7f)
(es/parser) Recognize named optional and rest tuple elements (#12368) (476ba33)
(hstr) Avoid panic in Wtf8::starts_with (#12383) (3ae4e24)
Correct quoted package name in changeset (#12387) (55ffd3e)

Features

(es/minifier) Honor /*#__PURE__*/ on property reads and destructuring patterns (#12384) (43f4fdb)

Miscellaneous Tasks

(deps) Eliminate unnecessary dependencies (#12377) (f517d5a)
(es/ast) Fix typo (#12376) (96c0927)

Performance

(es/preset-env) Reduce binary size with browserslist deflate (#12381) (81e0d7d)

Open source →

79.0.014 Sept 2026

chore: Publish crates with swc_core v79.0.0

chore: Publish crates with swc_core v79.0.0

Open source →

78.0.314 Sept 2026

chore: Publish crates with swc_core v78.0.3

chore: Publish crates with swc_core v78.0.3

Open source →

Additional notes

Bug Fixes

(es/parser) Respect line breaks after declare (#12353) (fe1dfad)
(es/parser) Parse optional generator methods (#12355) (0b33a30)
(es/parser) Allow line breaks before import attributes (#12356) (6684de3)
(es/parser) Allow await identifiers in explicit Script parsing (#12364) (a2db32d)
(es/parser) Respect line breaks before definite assignment assertions (#12362) (505766f)
(es/parser) Restore strict context after classes (#12361) (0cb1a67)
(es/parser) Reset static block context for nested declarations (#12360) (e3a33ab)
(es/parser) Allow eval and arguments in ambient function declarations (#12359) (21b0cba)
(es/parser) Parse static constructor methods in JavaScript (#12357) (98f718f)
(es/parser) Allow of bindings in await using loops (#12354) (c7f40bb)

Features

(bindings) Gate native npm releases on verified carriers (#12292) (556044f)

Testing

(es/transforms) Remove export-default-from benchmark (#12350) (5a2096f)

Open source →

78.0.212 Sept 2026

chore: Publish crates with swc_core v78.0.2

chore: Publish crates with swc_core v78.0.2

Open source →

Additional notes

Bug Fixes

(es) Decode template raw values when cooked is missing (#12347) (7898152)
(es/minifier) Preserve let initialization when dropping unused variables (#12345) (2ea13bf)

Documentation

(es/minifier) Clarify semantic preservation policy (#12349) (ff6a3c3)

Performance

(es/transforms) Skip script traversal in export-default-from (#12348) (f37ce70)

Refactor

(es/minifier) Remove useless helpers (#12343) (14bfa36)

Open source →

78.0.111 Sept 2026

chore: Publish crates with swc_core v78.0.1

chore: Publish crates with swc_core v78.0.1

Open source →

Additional notes

Bug Fixes

(es/codegen) Minify unicode escapes in template literals (#12284) (76ef91c)
(es/codegen) Separate generic type assertion openers (#12340) (8948dac)
(es/minifier) Check eval and arguments usage in var define scope (#12174) (5d1aa16)
(es/minifier) Drop unused object pattern defaults (#12176) (76ac4bd)
(es/minifier) Preserve Array spread arity (#12237) (cfbef85)
(es/minifier) Preserve holes in array joins (#12242) (7eca515)
(es/minifier) Preserve catch return before finally (#12232) (191b951)
(es/minifier) Skip prototype setters in Object.keys (#12249) (8953ee3)
(es/minifier) Guard static helper evaluation (#12247) (f154b61)
(es/minifier) Preserve string import names (#12245) (b23c5ed)
(es/minifier) Preserve unsigned shift coercion (#12260) (e0f3f4e)
(es/minifier) Fold missing codePointAt to undefined (#12230) (052592a)
(es/minifier) Fold local deletes to false (#12231) (dcbcf93)
(es/minifier) Preserve Function.length arity (#12251) (753db8c)
(es/minifier) Preserve rest RegExp identity (#12238) (4a73df1)
(es/minifier) Preserve lexical method defaults (#12239) (7446da9)
(es/minifier) Preserve arguments after IIFE spreads (#12243) (924d225)
(es/minifier) Preserve string method arguments (#12234) (0d377f1)
(es/minifier) Preserve optional-chain continuation throws (#12261) (c5f381b)
(es/minifier) Preserve constant switch test effects (#12252) (ca1f943)
(es/minifier) Preserve shadowed undefined yield values (#12272) (00da5c1)
(es/minifier) Retain unsafe Symbol call arguments (#12248) (2611085)
(es/minifier) Guard similar if merges (#12262) (e608832)
(es/minifier) Preserve conditional assignment target order (#12253) (5d703f0)
(es/minifier) Preserve Set and Map iteration (#12254) (c28b95f)
(es/minifier) Preserve sequence IIFE argument evaluation (#12258) (c8eec79)
(es/minifier) Respect global defs root bindings (#12266) (107af6a)
(es/minifier) Format toExponential compatibly (#12257) (62d8b28)
(es/minifier) Preserve tiny toPrecision calls (#12246) (d64acad)
(es/minifier) Preserve async IIFE return values (#12269) (3119b07)
(es/minifier) Retain rest params in dynamic scopes (#12264) (e222efd)
(es/minifier) Safely hoist property callees (#12183) (df3f7ab)
(es/minifier) Preserve catch assignments before finally (#12259) (7a2ca6e)
(es/minifier) Preserve delete operand effects (#12244) (d8631aa)
(es/minifier) Preserve unary comparison evaluation order (#12275) (440fd7f)
(es/minifier) Preserve branches when collapsing assignments (#12280) (0239111)
(es/minifier) Preserve empty array assignments (#12250) (20e9c5f)
(es/minifier) Preserve empty IIFE parameter effects (#12268) (c8a2657)
(es/minifier) Preserve empty join coercion (#12240) (a5bd592)
(es/minifier) Preserve empty object destructuring errors (#12276) (246e615)
(es/minifier) Deduplicate folded Object.keys (#12263) (c652537)
(es/minifier) Preserve finalizer breaks in switches (#12330) (1156952)
(es/minifier) Preserve strict equality for repeated calls (#12320) (2755d73)
(es/minifier) Preserve class scope in if-return negation (#12319) (f568ff2)
(es/minifier) Preserve function expression names (#12318) (9ee8686)
(es/minifier) Preserve finalizer completions (#12325) (eddbd18)
(es/minifier) Evaluate String.raw templates with raw quasis (#12322) (5f49135)
(es/minifier) Preserve returns in finalizers (#12324) (f7894f5)
(es/minifier) Scan all adjacent hoist declaration pairs (#12335) (c3e2d35)
(es/minifier) Preserve reassigned arguments access (#12235) (5f02d02)
(es/minifier) Preserve switch fallthrough cases (#12328) (fe41cd5)
(es/minifier) Preserve lone surrogate template values (#12329) (ff90d49)
(es/minifier) Preserve spread iteration in unused builtins (#12334) (90d449d)
(es/minifier) Preserve computed update targets (#12326) (22518fc)
(es/minifier) Check class side effect (#12336) (397e0b6)
(es/parser) Reject unicode escapes in RegExp flags (#12093) (4f98673)
(es/parser) Allow line breaks before enum names (#12341) (c594a7c)
(es/parser) Allow ambient rest trailing commas (#12342) (9362f19)
(es/typescript) Fold optional-chained enum member reads (#12179) (4519330)
Use Rust changeset package names (#12283) (7241d4b)

Documentation

(agents) Document terser fixture backlog workflow (#12274) (07328de)
(es/minifier) Clarify decorator input and test boundaries (#12337) (d8b76cc)

Features

(bindings) Add private compressed native addon foundation (#12289) (2855b5a)
(es/module) Support moduleRoot for AMD module IDs (#11964) (4b4c135)

Refactor

(es/minifier) Simplify constant-false loop guards (#12293) (a37d439)
(es/minifier) Remove useless helper (#12286) (b83aa6a)

Mod

(es/minifier) Check Map/Set param is array (#12287) (d602f58)

Open source →

78.0.04 Sept 2026

chore: Publish crates with swc_core v78.0.0

chore: Publish crates with swc_core v78.0.0

Open source →

Additional notes

Bug Fixes

(es/decorators) Drop params from getter replacing decorated private method (#12161) (d56f594)
(es/minifier) Preserve pure annotation ownership (#12180) (ec780f9)
(es/typescript) Treat const variable references as enum constants (#12101) (c523551)
(swc) Key optimizer env cache by configured values (#12166) (c0b6f12)

Features

(es/minifier) Evaluate Math.floor, Math.ceil, Math.round and Mat… (#12117) (e876e80)

Miscellaneous Tasks

(deps) Ignore unpatched Wasmtime advisory (#12170) (5dd7422)

Refactor

(react-compiler) Use official packages (#12168) (6d34fe7)

Ci

Tag published misc npm packages (#12173) (a789691)

Open source →

77.1.227 Aug 2026

chore: Publish crates with swc_core v77.1.2

chore: Publish crates with swc_core v77.1.2

Open source →

Additional notes

Bug Fixes

(es/quote) Restore await parsing (#12163) (918f517)

Open source →

77.1.126 Aug 2026

chore: Publish crates with swc_core v77.1.1

chore: Publish crates with swc_core v77.1.1

Open source →

Additional notes

Bug Fixes

(es/compat) Preserve for-of var binding scope (#12158) (f6d5bd1)
(es/minifier) Preserve do-while control-flow targets (#12160) (f62c437)

Open source →

77.1.026 Aug 2026

chore: Publish crates with swc_core v77.1.0

chore: Publish crates with swc_core v77.1.0

Open source →

Additional notes

Bug Fixes

(es/flow) Preserve Flow component type semantics (#12090) (c8d5b49)
(es/minifier) Drop spans of cached globals values (#12129) (9a306b8)
(es/minifier) Preserve effects of returned value calls (#12140) (c37b5a9)
(es/minifier) Avoid JSX sequence inlining loop (#12149) (4e79b94)
(es/minifier) Preserve bindings in copied inline arrows (#12141) (cf7b5c9)
(es/parser) Preserve await grammar boundaries (#12156) (c732683)
(visit) Panic on invalid AST paths (#12154) (b4d11a9)

Features

(es/parser) Add opt-in parser-only TSRX lowering (#12120) (61ff097)

Open source →

77.0.324 Aug 2026

chore: Publish crates with swc_core v77.0.3

chore: Publish crates with swc_core v77.0.3

Open source →

Additional notes

Bug Fixes

(es/minifier) Mark for update and test as executed multiple time (#12131) (1260e36)
(es/minifier) Report for loop var decl as assign (#12136) (783bbc2)
(es/minifier) Don't replace value-used console.*.bind() calls with undefined (#12138) (ed74223)
(es/parser) Retry ambiguous Program parsing (#12142) (141a320)

Miscellaneous Tasks

(deps) Upgrade reqwest to 0.12 (#12144) (8dd98e4)

Testing

(es/minifier) Update test fixtures (#12135) (2f3e88d)

Ci

Only plan completed issues and merged PRs (#12133) (4d9aa8e)
Gate jobs with detected changes (#12147) (3802924)

Open source →

77.0.218 Aug 2026

chore: Publish crates with swc_core v77.0.2

chore: Publish crates with swc_core v77.0.2

Open source →

Additional notes

Bug Fixes

(es/minifier) Preserve for init (#12121) (0a1d4de)
(es/react) Handle apos JSX entities (#12125) (d09547f)

Open source →

77.0.117 Aug 2026

chore: Publish crates with swc_core v77.0.1

chore: Publish crates with swc_core v77.0.1

Open source →

Additional notes

Bug Fixes

(es/modules) Preserve destructuring assignment targets in SystemJS (#12122) (557060b)

Open source →

77.0.014 Aug 2026

chore: Publish crates with swc_core v77.0.0

chore: Publish crates with swc_core v77.0.0

Open source →

Additional notes

Bug Fixes

(encoding) Fix incorrect fields count (#11905) (6fb4ca1)
- BREAKING: Fix incorrect fields count (#11905)
(es/ast) Fix panic on JSX surrogate entities (#11803) (d21de47)
- BREAKING: fix panic on JSX surrogate entities (#11803)

Miscellaneous Tasks

(deps) Update lru to 0.18.2 to fix cargo deny (#12116) (c9d1da4)

Refactor

(es/ast) Add body_ctxt to Switch (#12065) (bf25ae0)
- BREAKING: Add body_ctxt to Switch (#12065)
(es/ast) Split TypeScript this parameters (#12075) (1687c0f)
- BREAKING: split TypeScript this parameters (#12075)
(es/ast) Use Function for object accessors (#12077) (9ae902e)
- BREAKING: use Function for object accessors (#12077)
(es/ast) Introduce FunctionBody (#12096) (394c7c9)
- BREAKING: introduce FunctionBody (#12096)

Open source →

76.0.212 Aug 2026

chore: Publish crates with swc_core v76.0.2

chore: Publish crates with swc_core v76.0.2

Open source →

Additional notes

Bug Fixes

(es/minifier) Bound arguments parameter injection (#12053) (46d6f41)
(react-compiler) Preserve TypeScript function overload signatures (#12115) (a132384)

Open source →

76.0.111 Aug 2026

chore: Publish crates with swc_core v76.0.1

chore: Publish crates with swc_core v76.0.1

Open source →

Additional notes

Bug Fixes

(es/minifier) Remove unused variable initializer cycles (#12106) (0421534)

Open source →

76.0.08 Aug 2026

chore: Publish crates with swc_core v76.0.0

chore: Publish crates with swc_core v76.0.0

Open source →

Additional notes

Bug Fixes

(es/ast) Prevent mutable reference escape (#12088) (592f559)
(es/es2015) Preserve this in static field parameters (#12085) (5b758ed)
(es/preset-env) Lower unsupported async generators (#12086) (3a144b1)
(hstr) Avoid references to uninitialized bytes (#12087) (68f0983)
(plugin) Make raw byte reconstruction unsafe (#12089) (83ab4ed)
(plugin/runner) Write Wasmer cache atomically (#12100) (3c4f404)
(react-compiler) Make fast check conservative (#12105) (7e14950)

Miscellaneous Tasks

(deps) Update browserslist-rs to 0.20 (#12098) (b395eab)

Open source →

75.0.029 Jul 2026

(es) Preserve numeric property key identity

Bug Fixes

(es) Preserve numeric property key identity (#12050) (46900a3)
(es/ast) Support hashing non-finite numbers (#12043) (f4b85a6)
(es/codegen) Emit non-finite numeric literals (#12047) (883abc4)
(es/decorators) Avoid class state leakage for nested undecorated classes (#12076) (4c9d277)
(es/minifier) Apply ToInt32 when folding bitwise NOT (#12058) (550e2f7)
(es/minifier) Avoid inexact number radix folding (#12057) (506a0ea)
(es/minifier) Preserve invalid Array lengths (#12056) (3ce9e16)
(es/minifier) Preserve non-canonical arguments access (#12052) (850230b)
(es/minifier) Apply ToUint16 in fromCharCode (#12055) (9ae7b92)
(es/minifier) Index strings by UTF-16 code unit (#12054) (bc263d2)
(es/minifier) Use numeric literals for non-finite values (#12048) (b830786)
(es/minifier) Preserve top-level declarations referenced only by direct eval (#12029) (ad0e3b4)
(es/optimization) Preserve JSON numeric values (#12051) (667af8c)
(es/transforms) Use numeric literals for non-finite enum values (#12049) (1e3ed5c)
(es/typescript) Evaluate cooked enum templates (#12059) (49d0b0f)
(html/minifier) Preserve JSON script boundaries (#12080) (e1877b4)
(testing) Check ignored fixtures relative to crate root (#12073) (da858b4)
(ts/fast-strip) Preserve UTF-16 source positions (#12067) (ac4bfc9)

Features

(es/minifier) Expand support for trivial spreads (#12068) (aa49e36)
(es/react-compiler) Expose reactCompiler.environment.enableFunctionOutlining (#12030) (52b78aa)

Performance

(es/renamer) Skip identity rename mappings on apply (#12041) (0f9ff15)

Open source →

74.0.220 Jul 2026

(ts/fast-strip) Preserve ASI before interpolated templates

Bug Fixes

(ts/fast-strip) Preserve ASI before interpolated templates (#12040) (54467fe)

Ci

Update rust-toolchain action pin (#12036) (d1a1e23)
Use Node.js 24 for wasm publishing (#12038) (516bf3c)

Open source →

74.0.119 Jul 2026

(es/fixer) Preserve parens around PURE-annotated receivers

Bug Fixes

(es/fixer) Preserve parens around PURE-annotated receivers (#12022) (73d8941)
(ts/fast-strip) Handle generic arrow line breaks (#12034) (3d82701)

Features

(es/minifier) Remove unused param for new expr (#12027) (661067c)

Ci

Use Node.js 24 by default (#12035) (d658d08)

Open source →

74.0.018 Jul 2026

(deps) Update crossbeam-epoch to 0.9.20

Bug Fixes

(deps) Update crossbeam-epoch to 0.9.20 (#12004) (fababa1)
(es/hygiene) Ignore eval in default hygiene pass (#12003) (dd43ad6)
(es/minifier) Measure number length precisely (#12026) (54d139a)
(es/module) Rewrite SystemJS transform (#11996) (2f47530)
(react-compiler) Remove React-like prefilter (#12007) (ab66869)

Features

(es/minifier) Remove unused param for new Function or Class Expr (#12017) (be56e09)
(wasm) Add @swc/nodejs-support-wasm (#11975) (b617562)

Refactor

(es/helpers) Generate inline helpers from canonical ESM sources (#12006) (f36e4b6)
(es/helpers) Remove unused jsx helper (#12009) (ccbc906)
(es/lexer) Remove smartstring dependency (#12013) (d6833cc)
(es/minifier) Remove ProgramData.top (#12031) (a72571f)
(es/module) Introduce source module lowering pipeline (#11999) (9609b7f)
Remove direct rkyv dependencies (#12010) (5761a2b)

Ci

Update rust-toolchain action pin (#12021) (78b41b5)

Open source →

73.0.08 Jul 2026

(es/minifier) Make Infect Collect collect every used ident

Bug Fixes

(es/minifier) Make Infect Collect collect every used ident (#11998) (fb9ebee)
(es/module) Rewrite .tsx imports to .js unless JSX is preserved (#11995) (c341d9c)

Refactor

(es/module) Align module transform records with spec terms (#11992) (f680df5)

Open source →

72.0.06 Jul 2026

(es/minifier) Invoke IIFE when has eval

Bug Fixes

(es/minifier) Invoke IIFE when has eval (#11987) (457df11)
(es/react) Emit jsxdev source for fragments (#11993) (a70ce24)
(es/react-compiler) Correct catch and parameter scope resolution (#11985) (3867e57)

Features

(bindings) Add lint / lintSync API to @swc/react-compiler (#11965) (ab4ce67)

Open source →

71.0.74 Jul 2026

(es/minifier) Disable IIFE invoke when there's eval

Bug Fixes

(es/minifier) Disable IIFE invoke when there's eval (#11984) (eabe4be)

Open source →

71.0.61 Jul 2026

### Build - Remove vergen dependency

Build

Remove vergen dependency (#11976) (26d8a28)

Open source →

71.0.529 Jun 2026

(es/fixer) Normalize for-head ident patterns

Bug Fixes

(es/fixer) Normalize for-head ident patterns (#11968) (af681bc)
(es/minifier) Preserve switch fallthrough termination (#11971) (a5d19ae)
(es/minifier) Check last case (#11972) (060c7ac)
(es/modules) Resolve relative symlinked inputs from cwd (#11883) (01e857d)

Testing

(react-compiler) Add build-pass fixtures for wrapped assignment targets (#11967) (58d9b53)

Open source →

71.0.426 Jun 2026

(es/minifier) Eliminate unused classes with cyclic references

Bug Fixes

(es/minifier) Eliminate unused classes with cyclic references (#11963) (63a94b9)

Documentation

(agents) Document minifier assumptions (#11966) (58df612)

Ci

Allow publish milestone PR updates (#11960) (885d3e2)
Allow memmap2 advisory (#11961) (0be5872)

Open source →

71.0.322 Jun 2026

(react-compiler) Disable parser default features

Bug Fixes

(react-compiler) Disable parser default features (#11957) (75ddb28)

Open source →

71.0.222 Jun 2026

(es/parser) Allow no-default builds

Bug Fixes

(es/parser) Allow no-default builds (#11956) (baab240)

Open source →

71.0.121 Jun 2026

(react-compiler) React compiler AST conversion for wrapped assignment targets

Bug Fixes

(react-compiler) React compiler AST conversion for wrapped assignment targets (#11952) (fc9b453)

Open source →

71.0.021 Jun 2026

(es/es2022) Correct scope for private property brand checks

Bug Fixes

(es/es2022) Correct scope for private property brand checks (#11953) (fb5afa2)
(es/minifier) Gate Number(x) -> +x on unsafe flag (#11944) (#11949) (6176019)
(react-compiler) Avoid reporting non-fatal success errors as diagnostics (#11951) (cb4cb23)

Miscellaneous Tasks

(es/react-compiler) Update forked react compiler to 0.2.0 (#11946) (6fbe188)

Refactor

(es/react-compiler) Preserve TS metadata during AST roundtrip (#11950) (9c4dec3)

Open source →

70.0.018 Jun 2026

(es/react-compiler) Scope ClassStaticBlock and TsModuleBlock as var boundaries

Bug Fixes

(es/react-compiler) Scope ClassStaticBlock and TsModuleBlock as var boundaries (#11943) (1ee74a0)

Refactor

Remove production tracing hooks (#11945) (0dffdc4)

Open source →

69.0.016 Jun 2026

(swc) Gate react compiler re-export

Features

(swc) Gate react compiler re-export (#11941) (dcc0f2d)

Open source →

68.1.216 Jun 2026

(es/react-compiler) Skip TypeScript this pseudo-params in scope collector

Bug Fixes

(es/react-compiler) Skip TypeScript this pseudo-params in scope collector (#11940) (9066c43)

Open source →

68.1.115 Jun 2026

(es/minifier) Preserve cooked when concatenating template literals

Bug Fixes

(es/minifier) Preserve cooked when concatenating template literals (#11939) (a7244a6)

Open source →

68.1.015 Jun 2026

(es/parser) Parse Flow bare renders types

Bug Fixes

(es/parser) Parse Flow bare renders types (#11929) (a71c8eb)

Documentation

Document untrusted input security scope (#11937) (677305b)

Features

(es/react-compiler) Add React Compiler (#11917) (b182fbd)

Open source →

68.0.69 Jun 2026

(bindings/node) Preserve source context for AST transforms

Bug Fixes

(bindings/node) Preserve source context for AST transforms (#11920) (b6dfa74)
(es/codegen) Emit export as namespace correctly (#11923) (4e1f832)
(es/codegen) Emit export as namespace minified correctly (#11924) (7157499)
(es/fixer) Preserve new tagged template callee parens (#11922) (242a03a)
(es/minifier) Handle unknown member props (#11927) (e59ba68)
(es/parser) Handle Flow async generic arrows (#11926) (b9b8993)

Open source →

68.0.54 Jun 2026

(swc_common) Fix sourcemap panic for multibyte mapping positions

Bug Fixes

(swc_common) Fix sourcemap panic for multibyte mapping positions (#11918) (40c1601)

Revert

(swc_common) Revert sourcemap multibyte mapping clamp (#11919) (08b4200)

Open source →

68.0.42 Jun 2026

(es/decorators) Handle import types in decorator metadata

Bug Fixes

(es/decorators) Handle import types in decorator metadata (#11916) (f411429)

Open source →

68.0.31 Jun 2026

(es/renamer) Avoid duplicate mangled names across eval scope boundaries

Bug Fixes

(es/renamer) Avoid duplicate mangled names across eval scope boundaries (#11913) (4a1af84)

Documentation

Fix architecture fixer link (#11911) (51cbc8c)

Open source →

68.0.229 May 2026

(es/compat) Rewrite this in destructuring defaults

Bug Fixes

(es/compat) Rewrite this in destructuring defaults (#11909) (68af779)

Open source →

68.0.128 May 2026

Nothing published for this version

67.0.428 May 2026withdrawn

(swc) Preserve plugin error context

Bug Fixes

(swc) Preserve plugin error context (#11904) (4e2e9fc)

Open source →

67.0.327 May 2026withdrawn

### Performance - Optimize Atom equality

Performance

Optimize Atom equality (#11902) (c6f8cb0)

Open source →

67.0.227 May 2026withdrawn

(es/decorators) Revert decorator initializer ordering

Revert

(es/decorators) Revert decorator initializer ordering (#11901) (a3f23b1)

Open source →

67.0.125 May 2026withdrawn

Nothing published for this version

66.0.522 May 2026

(es/minifier) Preserve default parameter object props

Bug Fixes

(es/minifier) Preserve default parameter object props (#11884) (71ff84f)

Documentation

Clarify untrusted input security model (#11882) (5463777)

Ci

Update corepack in publish docker jobs (#11885) (9a7d954)

Open source →

66.0.422 May 2026

(es/minifier) Respect ecma for iife temp vars

Bug Fixes

(es/minifier) Respect ecma for iife temp vars (#11873) (e481934)
(es/parser) Reject object-rest assignment to array/object literal (#11875) (7b57d1f)
(es/parser) Reject object rest assignment to literals (#11881) (4ec2eaf)
(ts/fast-strip) Reject unsafe assertion erasure in binary expressions (#11828) (aa5b539)

Documentation

Add security policy (#11876) (6c43c2d)
Clarify security scope for npm packages (#11877) (4662db8)

Performance

(es/codegen) Remove JsWriter last_srcmap cache (#11869) (3bc1c2b)

Open source →

66.0.319 May 2026

(es/minifier) Fix typo in debug log

Miscellaneous Tasks

(es/minifier) Fix typo in debug log (#11866) (3de0254)

Performance

(es/codegen) Speed up JsWriter position and srcmap tracking (#11867) (dbceade)

Open source →

66.0.217 May 2026

(typescript) Strip parameter binding defaults in dts

Bug Fixes

(typescript) Strip parameter binding defaults in dts (#11857) (800bc17)

Miscellaneous Tasks

(html) Add webcontainer fallback for @swc/html (#11860) (7692eed)

Open source →

66.0.115 May 2026

(ts/fast-dts) Strip definite assertions in dts

Bug Fixes

(ts/fast-dts) Strip definite assertions in dts (#11858) (2ab1b8a)

Open source →

66.0.015 May 2026

(ecma) Reduce transformer compat overhead

Performance

(ecma) Reduce transformer compat overhead (#11856) (d03cb71)

Security

Update rkyv and Rust dependencies (#11851) (20d92eb)
Harden PR workflow permissions (#11849) (e199564)

Open source →

65.1.014 May 2026

(es/minifier) Reduce minifier profiling hotspots

Performance

(es/minifier) Reduce minifier profiling hotspots (#11853) (28c1091)
Optimize es parser comment finalization (#11852) (2959ddf)

Security

Save CI caches only on main (#11848) (7582529)

Open source →

65.0.411 May 2026

(es/minifier) Avoid generating mangled property names that collide with existing properties

Bug Fixes

(es/minifier) Avoid generating mangled property names that collide with existing properties (#11839) (9b4fab5)

Features

(es/minifier) Fine grained effect analysis of class (#11814) (c9058ad)
(swc_cli) Implement all features for swc_cli (#11797) (9300ede)

Open source →

65.0.34 May 2026

(es/minifier) Preserve args for destructured callbacks

Bug Fixes

(es/minifier) Preserve args for destructured callbacks (#11830) (21873b0)
(es/react) Exclude self-recursive hooks from refresh dependency array (#11838) (9101c71)

Documentation

Update agent guidance (#11842) (bf2d015)

Testing

(es/minifier) Move issue_11835 fixture out of terser folder (#11840) (3dd3431)

Open source →

65.0.22 May 2026

(es/minifier) Preserve for-init sequence order

Bug Fixes

(es/minifier) Preserve for-init sequence order (#11837) (16a56d0)
(es/parser) Parse empty Flow exact object type (#11836) (3d18a26)

Features

Move swc ast explorer into workspace (#11831) (02a8f81)

Open source →

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Feature-complete es2019 parser.