--- title: "tar Breaking Changes on npm | Since.dev" description: "What each tar release removed, renamed or changed: 29 breaking changes in 2 versions on npm, each with its source." canonical_url: https://since.dev/packages/npm/tar last_updated: 2026-03-20 --- # tar breaking changes Every breaking API change we have recorded in tar on npm: 29 breaking changes in 2 versions. Below are its newest 2 versions, removals and renames first, each with its source. Newest change March 20, 2026 ## 7.5.12 28 breaking changes, first published March 20, 2026. - **Signature changed** `TarOptionsWithAliases.onentry` Was onentry?: (entry: ReadEntry) => any; now onentry?: (entry: ReadEntry) => unknown. [npmjs.com](https://www.npmjs.com/package/tar/v/7.5.12) - **Signature changed** `TarOptionsWithAliases.onReadEntry` Was onReadEntry?: (entry: ReadEntry) => any; now onReadEntry?: (entry: ReadEntry) => unknown. [npmjs.com](https://www.npmjs.com/package/tar/v/7.5.12) - **Signature changed** `TarOptionsWithAliases.onwarn` Was onwarn?: (code: string, message: string, data: WarnData) => any; now onwarn?: (code: string, message: string, data: WarnData) => unknown. [npmjs.com](https://www.npmjs.com/package/tar/v/7.5.12) - **Signature changed** `TarOptionsWithAliases.onWriteEntry` Was onWriteEntry?: (entry: WriteEntry) => any; now onWriteEntry?: (entry: WriteEntry) => unknown. [npmjs.com](https://www.npmjs.com/package/tar/v/7.5.12) - **Signature changed** `TarOptionsWithAliases.transform` Was transform?: (entry: ReadEntry) => any; now transform?: (entry: ReadEntry) => ReadEntry. [npmjs.com](https://www.npmjs.com/package/tar/v/7.5.12) - **Signature changed** `TarOptionsWithAliasesAsync.onentry` Was onentry?: (entry: ReadEntry) => any; now onentry?: (entry: ReadEntry) => unknown. [npmjs.com](https://www.npmjs.com/package/tar/v/7.5.12) - **Signature changed** `TarOptionsWithAliasesAsync.onReadEntry` Was onReadEntry?: (entry: ReadEntry) => any; now onReadEntry?: (entry: ReadEntry) => unknown. [npmjs.com](https://www.npmjs.com/package/tar/v/7.5.12) - **Signature changed** `TarOptionsWithAliasesAsync.onwarn` Was onwarn?: (code: string, message: string, data: WarnData) => any; now onwarn?: (code: string, message: string, data: WarnData) => unknown. [npmjs.com](https://www.npmjs.com/package/tar/v/7.5.12) - **Signature changed** `TarOptionsWithAliasesAsync.onWriteEntry` Was onWriteEntry?: (entry: WriteEntry) => any; now onWriteEntry?: (entry: WriteEntry) => unknown. [npmjs.com](https://www.npmjs.com/package/tar/v/7.5.12) - **Signature changed** `TarOptionsWithAliasesAsync.transform` Was transform?: (entry: ReadEntry) => any; now transform?: (entry: ReadEntry) => ReadEntry. [npmjs.com](https://www.npmjs.com/package/tar/v/7.5.12) And 18 more in this version. ## 7.5.3 1 breaking change, first published January 16, 2026. - **Signature changed** `Pax.encode` Was encode(): Buffer; now encode(): Buffer. [npmjs.com](https://www.npmjs.com/package/tar/v/7.5.3) ## 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.