# cosmiconfig-typescript-loader: what changed from 5 to 6

- Product: cosmiconfig-typescript-loader (https://whatsnew.fyi/product/cosmiconfig-typescript-loader)
- Vendor: cosmiconfig-typescript-loader
- Range: changelog entries numbered after 5.1.0 up to and including 6.3.0, stable releases only
- Entries below: 4 releases (newest first)
- Resolved: 5 is 5.1.0 and 6 is 6.3.0, the newest stable release of each major we track
- Carrying security changes: 1 · CVEs mentioned: 0 · Mentioning breaking changes: 1 · Removing or deprecating something: 1
- Page: https://whatsnew.fyi/product/cosmiconfig-typescript-loader/compare/5...6

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

## What changed (11 changes, grouped by kind)

### Added

#### 6.0.0 (2024-10-19)

- TypeScriptLoaderSync is available as a synchronous loader alternative

### Changed

#### 6.3.0 (2026-04-09)

- Update dependencies to resolve security advisories

#### 6.2.0 (2025-10-10)

- Update all non-major dependencies

#### 6.0.0 (2024-10-19)

- TypeScriptLoader is now asynchronous
- Upgrade to Jiti 2

### Fixed

#### 6.0.0 (2024-10-19)

- Improve typings

### Removed

#### 6.0.0 (2024-10-19)

- Drop support for Node 16

### Deprecated

#### 6.0.0 (2024-10-19)

- TypeScriptLoaderSync is deprecated as Jiti has deprecated their synchronous import API

### Security

#### 6.3.0 (2026-04-09)

- Pin all dependencies
- Use trusted NPM OIDC for releases
- Remove any manually generated tokens

_One release carries no categorized changes yet: 6.1.0._

## Release notes

### 6.3.0 — Release 6.3.0

- Date: 2026-04-09
- Version: 6.3.0
- Original notes: https://github.com/Codex-/cosmiconfig-typescript-loader/releases/tag/6.3.0
- Permalink: https://whatsnew.fyi/product/cosmiconfig-typescript-loader/releases/6.3.0

- **changed** — Update dependencies to resolve security advisories
- **security** — Pin all dependencies
- **security** — Use trusted NPM OIDC for releases
- **security** — Remove any manually generated tokens

######    ⚙️ Maintenance Release

- **deps**: Update dependencies to resolve security advisories
- **security**: Pin all dependencies
- **security**: Use trusted NPM OIDC for releases
- **security**: Remove any manually generated tokens

### 6.2.0 — Release 6.2.0

- Date: 2025-10-10
- Version: 6.2.0
- Original notes: https://github.com/Codex-/cosmiconfig-typescript-loader/releases/tag/6.2.0
- Permalink: https://whatsnew.fyi/product/cosmiconfig-typescript-loader/releases/6.2.0

- **changed** — Update all non-major dependencies

######    ⚙️ Maintenance Release

- **cicd**: Run CICD for Node 24
- **deps**: Update all non-major depencies
- **repo**: Add FUNDING.yaml

######     [View changes on GitHub](https://github.com/Codex-/cosmiconfig-typescript-loader/compare/6.1.0...6.2.0)

### 6.1.0 — Release 6.1.0

- Date: 2024-12-05
- Version: 6.1.0
- Original notes: https://github.com/Codex-/cosmiconfig-typescript-loader/releases/tag/6.1.0
- Permalink: https://whatsnew.fyi/product/cosmiconfig-typescript-loader/releases/6.1.0

- chore(deps): update all non-major dependencies [`#156`](https://github.com/Codex-/cosmiconfig-typescript-loader/pull/156)
- chore(deps): update node.js to v22 [`#153`](https://github.com/Codex-/cosmiconfig-typescript-loader/pull/153)
- chore(deps): update codecov/codecov-action action to v5 [`#157`](https://github.com/Codex-/cosmiconfig-typescript-loader/pull/157)
- build(deps): bump cross-spawn from 7.0.3 to 7.0.5 [`#155`](https://github.com/Codex-/cosmiconfig-typescript-loader/pull/155)
- build(deps): bump @eslint/plugin-kit from 0.2.1 to 0.2.3 [`#154`](https://github.com/Codex-/cosmiconfig-typescript-loader/pull/154)
- chore: update lint finding [`0de32d9`](https://github.com/Codex-/cosmiconfig-typescript-loader/commit/0de32d9205d7317e26d6ea7fa62c28189ba5b5fe)
- chore(deps): update dependency node to v22 [`3e5f863`](https://github.com/Codex-/cosmiconfig-typescript-loader/commit/3e5f86305d3e2358e6bc5367d7b8b3f8add17489)

### 6.0.0 — Release 6.0.0

- Date: 2024-10-19
- Version: 6.0.0
- Original notes: https://github.com/Codex-/cosmiconfig-typescript-loader/releases/tag/6.0.0
- Permalink: https://whatsnew.fyi/product/cosmiconfig-typescript-loader/releases/6.0.0

- **changed** — TypeScriptLoader is now asynchronous
- **added** — TypeScriptLoaderSync is available as a synchronous loader alternative
- **deprecated** — TypeScriptLoaderSync is deprecated as Jiti has deprecated their synchronous import API
- **removed** — Drop support for Node 16
- **changed** — Upgrade to Jiti 2
- **fixed** — Improve typings

#### Breaking changes

- `TypeScriptLoader` is now asynchronous
  - A synchronous loader can still be accessed by importing `TypeScriptLoaderSync`
    - `TypeScriptLoaderSync` is deprecated, as Jiti has deprecated their synchronous import API.
- Drop support for Node 16

#### Misc changes

- chore(deps): lock file maintenance [`#151`](https://github.com/Codex-/cosmiconfig-typescript-loader/pull/151)
- chore(deps): update all non-major dependencies [`#150`](https://github.com/Codex-/cosmiconfig-typescript-loader/pull/150)
- Upgrade to Jiti 2 [`#149`](https://github.com/Codex-/cosmiconfig-typescript-loader/pull/149)
- chore(deps): update dependency eslint to v9 [`#134`](https://github.com/Codex-/cosmiconfig-typescript-loader/pull/134)
- Migrate to pnpm and asdf-vm [`#148`](https://github.com/Codex-/cosmiconfig-typescript-loader/pull/148)
- cicd: Use pnpm and asdf-vm [`22fc584`](https://github.com/Codex-/cosmiconfig-typescript-loader/commit/22fc584c4fe499b22f45a3f6f3a33cb38d6b4b97)
- fix: missed npx commands, moved to pnpm exec [`0056629`](https://github.com/Codex-/cosmiconfig-typescript-loader/commit/0056629c5791ace1a262cb7dcacf3959a7e40029)
- chore(deps): update remaining eslint packages [`e56943e`](https://github.com/Codex-/cosmiconfig-typescript-loader/commit/e56943e3074ba93eefeee6abdf2fe14a5ad59d67)
- feat!: Upgrade to Jiti 2 [`f5ee080`](https://github.com/Codex-/cosmiconfig-typescript-loader/commit/f5ee08031cff172b451803da4b71eb3bf0a1ba01)
- chore(deps): update dependency @typescript-eslint/eslint-plugin to v8 [`deb156d`](https://github.com/Codex-/cosmiconfig-typescript-loader/commit/deb156dfc6ad79a5a6f1de1ad7e8a8acdcf78e3c)
- test: imrpove smoke tests [`ae87dd3`](https://github.com/Codex-/cosmiconfig-typescript-loader/commit/ae87dd3188035fe382815c203ea4562499b97cf3)
- test: improve tests [`364312b`](https://github.com/Codex-/cosmiconfig-typescript-loader/commit/364312b04de2beb7985a6ebd30952ad25b3429c7)
- chore: resolve lint issues [`8a6d72a`](https://github.com/Codex-/cosmiconfig-typescript-loader/commit/8a6d72a311eeeeccc7324b7603ca903c9771449a)
- fix: improve typings [`6f9fb98`](https://github.com/Codex-/cosmiconfig-typescript-loader/commit/6f9fb984794c8e2aabbad82644bc25fc4b9e2cf8)
- cicd: use frozen lockfile [`304e26e`](https://github.com/Codex-/cosmiconfig-typescript-loader/commit/304e26e14f2ada1171cc18c67b651df7808cff35)
- fix: codecov reporting [`95a3e23`](https://github.com/Codex-/cosmiconfig-typescript-loader/commit/95a3e23bc68bfdbbe1257710e02d32867ea88ff7)
- chore: remove reaching into jiti for types [`1547200`](https://github.com/Codex-/cosmiconfig-typescript-loader/commit/1547200bd5b04d6deb48efe61f9cdc4901cff8eb)
- cicd: fix coverage command usage [`3757a12`](https://github.com/Codex-/cosmiconfig-typescript-loader/commit/3757a12bacf20582fbbb6191a33765e2823e567b)
- chore!: drop support for Node 16 [`35cd021`](https://github.com/Codex-/cosmiconfig-typescript-loader/commit/35cd02162f217dc9148d22ca917aefb47e53e346)