Add `yuku` parser by fisker · Pull Request #19628 · prettier/prettier

fisker · 2026-07-14T12:36:44Z

Description

Part of #19627

Checklist

I’ve added tests to confirm my change works.
(If changing the API or CLI) I’ve documented the changes I’ve made (in the docs/ directory).
(If the change is user-facing) I’ve added my changes to changelog_unreleased/*/XXXX.md file following changelog_unreleased/TEMPLATE.md. (Will add in Add yuku-ts parser #19629)
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(If the above is not checked) I have reviewed the AI-generated content before submitting.

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commit: c4367b2

fisker · 2026-07-14T14:33:33Z

Script

echo babel
time yarn debug "**/*.js" --parser=babel --with-node-modules > /dev/null
echo meriyah
time yarn debug "**/*.js" --parser=meriyah --with-node-modules > /dev/null
echo oxc
time yarn debug "**/*.js" --parser=oxc --with-node-modules > /dev/null
echo yuku
time yarn debug "**/*.js" --parser=yuku --with-node-modules > /dev/null

Result

babel

real    6m36.010s
user    4m47.228s
sys     2m0.740s
meriyah

real    5m42.801s
user    4m26.996s
sys     1m47.112s
oxc

real    5m42.092s
user    4m8.574s
sys     1m49.742s
yuku

real    5m47.909s
user    4m12.826s
sys     1m53.622s

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com> # Conflicts: # tests/format/js/deferred-import-evaluation/__snapshots__/format.test.js.snap

This PR contains the following updates: | Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) | |---|---|---|---| | [prettier](https://prettier.io) ([source](https://github.com/prettier/prettier)) | [`3.9.5` → `3.9.6`](https://renovatebot.com/diffs/npm/prettier/3.9.5/3.9.6) | ![age](https://developer.mend.io/api/mc/badges/age/npm/prettier/3.9.6?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/prettier/3.9.5/3.9.6?slim=true) | --- ### Release Notes <details> <summary>prettier/prettier (prettier)</summary> ### [`v3.9.6`](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#396) [Compare Source](prettier/prettier@3.9.5...3.9.6) [diff](prettier/prettier@3.9.5...3.9.6) ##### TypeScript: Preserve quotes for methods named `new` ([#19621](prettier/prettier#19621) by [@kovsu](https://github.com/kovsu))  ```tsx // Input interface Container { "new"(id: string): number; } // Prettier 3.9.5 interface Container { new(id: string): number; } // Prettier 3.9.6 interface Container { "new"(id: string): number; } ``` ##### TypeScript: Support `import defer` ([#19624](prettier/prettier#19624), [#19675](prettier/prettier#19675) by [@fisker](https://github.com/fisker))  ```tsx // Input import defer * as foo from "foo"; // Prettier 3.9.5 import * as foo from "foo"; // Prettier 3.9.6 import defer * as foo from "foo"; ``` ##### JavaScript: Added a new official plugin `@prettier/plugin-yuku` ([#19628](prettier/prettier#19628), [#19629](prettier/prettier#19629) by [@fisker](https://github.com/fisker)) `@prettier/plugin-yuku` is powered by [Yuku](https://yuku.fyi/) (A high-performance JavaScript/TypeScript compiler toolchain written in Zig). This plugin includes two new parsers: `yuku` (JavaScript syntax) and `yuku-ts` (TypeScript syntax). **To use this plugin:** 1. Install the plugin: ```bash yarn add --dev prettier @prettier/plugin-yuku ``` 2. Add it to your `.prettierrc`: ```yaml plugins: - "@prettier/plugin-yuku" ``` Due to package size limitations, this plugin is not bundled with the main prettier package and must be installed separately. For more information, check [the package homepage](https://github.com/prettier/prettier/tree/main/packages/plugin-yuku). Big thanks to [@arshad-yaseen](https://github.com/arshad-yaseen) for his excellent work. </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).  Reviewed-on: https://git.3caravelle.net/3Caravelle/renovate/pulls/48 Co-authored-by: Renovate Bot <[email protected]> Co-committed-by: Renovate Bot <[email protected]>

…fleeting-plugin-hetzner!393) This MR contains the following updates: | Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) | |---|---|---|---| | [prettier](https://prettier.io) ([source](https://github.com/prettier/prettier)) | `3.9.5` → `3.9.6` | ![age](https://developer.mend.io/api/mc/badges/age/npm/prettier/3.9.6?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/prettier/3.9.5/3.9.6?slim=true) | Note: The `pre-commit` manager in Renovate is not supported by the `pre-commit` maintainers or community. Please do not report any problems there, instead [create a Discussion in the Renovate repository](https://github.com/renovatebot/renovate/discussions/new) if you have any questions. --- ### Release Notes <details> <summary>prettier/prettier (prettier)</summary> ### [`v3.9.6`](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#396) [Compare Source](prettier/prettier@3.9.5...3.9.6) [diff](prettier/prettier@3.9.5...3.9.6) ##### TypeScript: Preserve quotes for methods named `new` ([#19621](prettier/prettier#19621) by [@kovsu](https://github.com/kovsu))  ```tsx // Input interface Container { "new"(id: string): number; } // Prettier 3.9.5 interface Container { new(id: string): number; } // Prettier 3.9.6 interface Container { "new"(id: string): number; } ``` ##### TypeScript: Support `import defer` ([#19624](prettier/prettier#19624), [#19675](prettier/prettier#19675) by [@fisker](https://github.com/fisker))  ```tsx // Input import defer * as foo from "foo"; // Prettier 3.9.5 import * as foo from "foo"; // Prettier 3.9.6 import defer * as foo from "foo"; ``` ##### JavaScript: Added a new official plugin `@prettier/plugin-yuku` ([#19628](prettier/prettier#19628), [#19629](prettier/prettier#19629) by [@fisker](https://github.com/fisker)) `@prettier/plugin-yuku` is powered by [Yuku](https://yuku.fyi/) (A high-performance JavaScript/TypeScript compiler toolchain written in Zig). This plugin includes two new parsers: `yuku` (JavaScript syntax) and `yuku-ts` (TypeScript syntax). **To use this plugin:** 1. Install the plugin: ```bash yarn add --dev prettier @prettier/plugin-yuku ``` 2. Add it to your `.prettierrc`: ```yaml plugins: - "@prettier/plugin-yuku" ``` Due to package size limitations, this plugin is not bundled with the main prettier package and must be installed separately. For more information, check [the package homepage](https://github.com/prettier/prettier/tree/main/packages/plugin-yuku). Big thanks to [@arshad-yaseen](https://github.com/arshad-yaseen) for his excellent work. </details> --- ### Configuration 📅 **Schedule**: (UTC) - Branch creation - At any time (no schedule defined) - Automerge - At any time (no schedule defined) 🚦 **Automerge**: Enabled. ♻ **Rebasing**: Whenever MR is behind base branch, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this MR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this MR, check this box --- This MR has been generated by [Mend Renovate](https://github.com/renovatebot/renovate).

fisker added 10 commits July 14, 2026 19:22

Add yuku parser

b563eaa

Enable in tests

7b3da0b

Error handling

5d59580

errors

c731c6b

Errors

c086360

Add package

4a54d33

Pass tests

048aa3f

JSX

9fd9b04

Build

85ccbc3

Build

858c7a1

fisker changed the title ~~Yuku~~ Add yuku parser Jul 14, 2026

autofix-ci Bot and others added 13 commits July 14, 2026 12:38

Apply automated changes

c712ac2

WASM

587d65f

Apply automated changes

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renovate.json5

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Minor tweak

7484444

Website

3746c74

Fix

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Fix

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Browser

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Linting

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Disable tests

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fisker and others added 2 commits July 14, 2026 23:37

Back to sync

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Apply automated changes

bb23265

fisker mentioned this pull request Jul 14, 2026

Add yuku-ts parser #19629

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fisker mentioned this pull request Jul 14, 2026

New Expression with non-null expression incorrectly parsed yuku-toolchain/yuku#109

Closed

fisker added 2 commits July 15, 2026 01:42

0.6.2

afc5f31

All fixed

c4367b2

fisker marked this pull request as ready for review July 14, 2026 17:45

fisker merged commit 1ccdfcc into prettier:main Jul 14, 2026
39 checks passed

fisker deleted the yuku branch July 14, 2026 17:53

fisker added a commit that referenced this pull request Jul 17, 2026

Add yuku parser (#19628)

1b246f8

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com> # Conflicts: # tests/format/js/deferred-import-evaluation/__snapshots__/format.test.js.snap

github-actions Bot mentioned this pull request Aug 4, 2026

chore(deps): update dependency prettier to v3.9.6 victoraugustoas/finance-manager#95

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Add `yuku` parser - #19628

Add `yuku` parser#19628
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