--- title: "typescript Breaking Changes on npm | Since.dev" description: "What each typescript release removed, renamed or changed: 1,586 breaking changes in 2 versions on npm, each with its source." canonical_url: https://since.dev/packages/npm/typescript last_updated: 2026-07-08 --- # 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 ## 7.0.2 1,539 breaking changes, first published July 8, 2026. - **Removed** `__String` \_\_String was removed in typescript 7.0.2 [npmjs.com](https://www.npmjs.com/package/typescript/v/7.0.2) - **Removed** `AbstractKeyword` AbstractKeyword was removed in typescript 7.0.2 [npmjs.com](https://www.npmjs.com/package/typescript/v/7.0.2) - **Removed** `AccessibilityModifier` AccessibilityModifier was removed in typescript 7.0.2 [npmjs.com](https://www.npmjs.com/package/typescript/v/7.0.2) - **Removed** `AccessorKeyword` AccessorKeyword was removed in typescript 7.0.2 [npmjs.com](https://www.npmjs.com/package/typescript/v/7.0.2) - **Removed** `addEmitHelper` addEmitHelper was removed in typescript 7.0.2 [npmjs.com](https://www.npmjs.com/package/typescript/v/7.0.2) - **Removed** `addEmitHelpers` addEmitHelpers was removed in typescript 7.0.2 [npmjs.com](https://www.npmjs.com/package/typescript/v/7.0.2) - **Removed** `addSyntheticLeadingComment` addSyntheticLeadingComment was removed in typescript 7.0.2 [npmjs.com](https://www.npmjs.com/package/typescript/v/7.0.2) - **Removed** `addSyntheticTrailingComment` addSyntheticTrailingComment was removed in typescript 7.0.2 [npmjs.com](https://www.npmjs.com/package/typescript/v/7.0.2) - **Removed** `AffectedFileResult` AffectedFileResult was removed in typescript 7.0.2 [npmjs.com](https://www.npmjs.com/package/typescript/v/7.0.2) - **Removed** `AmdDependency` AmdDependency was removed in typescript 7.0.2 [npmjs.com](https://www.npmjs.com/package/typescript/v/7.0.2) 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](https://www.npmjs.com/package/typescript/v/6.0.2) - **Signature changed** `TypeFlags.BigIntLike` Was BigIntLike = 2112; now BigIntLike = 4224. [npmjs.com](https://www.npmjs.com/package/typescript/v/6.0.2) - **Signature changed** `TypeFlags.BigIntLiteral` Was BigIntLiteral = 2048; now BigIntLiteral = 4096. [npmjs.com](https://www.npmjs.com/package/typescript/v/6.0.2) - **Signature changed** `TypeFlags.Boolean` Was Boolean = 16; now Boolean = 256. [npmjs.com](https://www.npmjs.com/package/typescript/v/6.0.2) - **Signature changed** `TypeFlags.BooleanLike` Was BooleanLike = 528; now BooleanLike = 8448. [npmjs.com](https://www.npmjs.com/package/typescript/v/6.0.2) - **Signature changed** `TypeFlags.BooleanLiteral` Was BooleanLiteral = 512; now BooleanLiteral = 8192. [npmjs.com](https://www.npmjs.com/package/typescript/v/6.0.2) - **Signature changed** `TypeFlags.Conditional` Was Conditional = 16777216; now Conditional = 67108864. [npmjs.com](https://www.npmjs.com/package/typescript/v/6.0.2) - **Signature changed** `TypeFlags.Enum` Was Enum = 32; now Enum = 65536. [npmjs.com](https://www.npmjs.com/package/typescript/v/6.0.2) - **Signature changed** `TypeFlags.EnumLike` Was EnumLike = 1056; now EnumLike = 98304. [npmjs.com](https://www.npmjs.com/package/typescript/v/6.0.2) - **Signature changed** `TypeFlags.EnumLiteral` Was EnumLiteral = 1024; now EnumLiteral = 32768. [npmjs.com](https://www.npmjs.com/package/typescript/v/6.0.2) And 37 more in this version. ## Check your code These are the changes. To see which of them reach your code, [scan a public repository](https://since.dev/scan.md), or have your coding agent call `check_code` with your manifest or lockfile over [MCP](https://since.dev/docs.md#mcp). [The API](https://since.dev/docs.md#api) reads every change in every version, not only the newest. On Team and up, a fix pull request opens for the changes that reach a connected repository. Nothing merges or deploys. ## Put your code on continuous management. Scan a public repository now, or give your agent one line. ### See how out of date your code is. [Scan a repository](https://since.dev/scan.md). Any public GitHub repository. No sign-in. ### Tell your agent what changed since it was trained. `claude mcp add --transport http since https://api.since.dev/mcp` --- Every page on this site as Markdown: https://since.dev/sitemap.md. For agents: https://since.dev/llms.txt.