CHANGELOG.md

Changelog

3.0.0-rc.1 (2026-03-21)

Features

• version 3 (#796) (f9f5042)

BREAKING CHANGES

• Drop support for Node 18
• Minimum supported TypeScript version is now 5.5.2
• Dropped CJS build.
• Removed deprecated API functions.

Co-authored-by: Kevin Deng sxzz@sxzz.moe Co-authored-by: Kevin Deng hi@sxzz.moe Co-authored-by: fisker Cheung lionkay@gmail.com Co-authored-by: Kirk Waiblinger 53019676+kirkwaiblinger@users.noreply.github.com Co-authored-by: Josh Goldberg git@joshuakgoldberg.com

2.5.0 (2026-03-19)

Bug Fixes

• crash in getWellKnownSymbolPropertyOfType for mapped typeof symbol (#698) (e97334e)
• empty commit for publish with provenance (3f5203c)
• enable stripInternal to avoid exposing type augmentations (#765) (77b8485), closes #759
• isPropertyReadonlyInType crash on readonly array of a generic arrow function parameter (#757) (691cb33), closes #754

Features

• isStrictCompilerOptionEnabled should default to strict: true for TS 6 (#873) (4d6cc50), closes #870
• add iterateComments method (#758) (ea4e4c0), closes #755 #756 #756
• add iterateTokens method (#756) (e2ca2a2), closes #755 #755
• rename *TypeParts functions to *Constituents (#713) (c3e980e), closes #375

2.4.0 (2026-03-05)

Bug Fixes

• crash in getWellKnownSymbolPropertyOfType for mapped typeof symbol (#698) (e97334e)
• empty commit for publish with provenance (3f5203c)
• enable stripInternal to avoid exposing type augmentations (#765) (77b8485), closes #759
• isPropertyReadonlyInType crash on readonly array of a generic arrow function parameter (#757) (691cb33), closes #754

Features

• add iterateComments method (#758) (ea4e4c0), closes #755 #756 #756
• add iterateTokens method (#756) (e2ca2a2), closes #755 #755
• rename *TypeParts functions to *Constituents (#713) (c3e980e), closes #375

1.4.3 (2024-11-29)

Bug Fixes

• make isTypeParameter no longer a typeguard (#597) (128237f)

1.4.2 (2024-11-26)

Bug Fixes

• remove .value field from type declarations for boolean literal types (#535) (12df298), closes #528

Performance Improvements

• reduce package size (#593) (123a8f4)

1.4.0 (2024-10-30)

Bug Fixes

• empty commmit to trigger CI release (ba0bfdf)
• handle const Type Parameters (#519) (41cd21d), closes #518
• make isFalsyType() return true for 0n (#545) (fe52a60), closes #544

Features

• add getAccessKind (#398) (2f8c76a), closes #397

1.2.1 (2024-2-6)

Bug Fixes

• downgrade engines.node to >=16 (#390) (2857ee9), closes #389

1.2.0 (2024-2-5)

Bug Fixes

• empty fix commit to test release flow (81f467a)

Features

• add collectVariableUsage API (#274) (b6a40ea), closes #263
• add typeParts function (#374) (ab0c924), closes #258