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typescript breaking changes

Every breaking API change we have recorded in typescript on npm: 1,586 breaking changes in 2 versions. Below are its newest 2 versions, removals and renames first, each with its source.

Newest change July 8, 2026

On this page

7.0.2

1,539 breaking changes, first published July 8, 2026.

  • Removed __String
    __String was removed in typescript 7.0.2 npmjs.com
  • Removed AbstractKeyword
    AbstractKeyword was removed in typescript 7.0.2 npmjs.com
  • Removed AccessibilityModifier
    AccessibilityModifier was removed in typescript 7.0.2 npmjs.com
  • Removed AccessorKeyword
    AccessorKeyword was removed in typescript 7.0.2 npmjs.com
  • Removed addEmitHelper
    addEmitHelper was removed in typescript 7.0.2 npmjs.com
  • Removed addEmitHelpers
    addEmitHelpers was removed in typescript 7.0.2 npmjs.com
  • Removed addSyntheticLeadingComment
    addSyntheticLeadingComment was removed in typescript 7.0.2 npmjs.com
  • Removed addSyntheticTrailingComment
    addSyntheticTrailingComment was removed in typescript 7.0.2 npmjs.com
  • Removed AffectedFileResult
    AffectedFileResult was removed in typescript 7.0.2 npmjs.com
  • Removed AmdDependency
    AmdDependency was removed in typescript 7.0.2 npmjs.com

And 1,529 more in this version.

6.0.2

47 breaking changes, first published March 23, 2026.

  • Signature changed TypeFlags.BigInt
    Was BigInt = 64; now BigInt = 128. npmjs.com
  • Signature changed TypeFlags.BigIntLike
    Was BigIntLike = 2112; now BigIntLike = 4224. npmjs.com
  • Signature changed TypeFlags.BigIntLiteral
    Was BigIntLiteral = 2048; now BigIntLiteral = 4096. npmjs.com
  • Signature changed TypeFlags.Boolean
    Was Boolean = 16; now Boolean = 256. npmjs.com
  • Signature changed TypeFlags.BooleanLike
    Was BooleanLike = 528; now BooleanLike = 8448. npmjs.com
  • Signature changed TypeFlags.BooleanLiteral
    Was BooleanLiteral = 512; now BooleanLiteral = 8192. npmjs.com
  • Signature changed TypeFlags.Conditional
    Was Conditional = 16777216; now Conditional = 67108864. npmjs.com
  • Signature changed TypeFlags.Enum
    Was Enum = 32; now Enum = 65536. npmjs.com
  • Signature changed TypeFlags.EnumLike
    Was EnumLike = 1056; now EnumLike = 98304. npmjs.com
  • Signature changed TypeFlags.EnumLiteral
    Was EnumLiteral = 1024; now EnumLiteral = 32768. npmjs.com

And 37 more in this version.

Check your code

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