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Support readonly as Flow variance annotation - #19022
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Flow now accepts `readonly` as a property variance annotation equivalent to `+` (covariant/read-only). Update the Variance node printer and type definition to handle `kind: "readonly"`, and update hermes-parser to 0.35.0 which supports emitting these nodes.
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fisker
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Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com> Co-authored-by: fisker Cheung <lionkay@gmail.com>
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Summary: Commit picked in https://github.com/pieterv/prettier/commits/flow-fork. Also needed to bump a few package versions to make the test pass (see https://github.com/pieterv/prettier/commits/flow-fork/). mjs generated by `./scripts/build-prettier.sh` directly on devserver. Reviewed By: SamChou19815 Differential Revision: D100704164 fbshipit-source-id: 927cfebc54462ce6b42cf2e5087b0f88b42d6670
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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)) | [`3.8.4` → `3.8.5`](https://renovatebot.com/diffs/npm/prettier/3.8.4/3.8.5) |  |  | --- ### Release Notes <details> <summary>prettier/prettier (prettier)</summary> ### [`v3.8.5`](https://github.com/prettier/prettier/releases/tag/3.8.5) [Compare Source](prettier/prettier@3.8.4...3.8.5) - Fix Flow variance annotation print ([#​19022](prettier/prettier#19022) by [@​marcoww6](https://github.com/marcoww6)) 🔗 [Changelog](https://github.com/prettier/prettier/blob/3.8.5/CHANGELOG.md#385) </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. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0Mi44MS4zIiwidXBkYXRlZEluVmVyIjoiNDIuODEuMyIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOltdfQ==--> Reviewed-on: https://git.3caravelle.net/3Caravelle/renovate/pulls/41 Co-authored-by: Renovate Bot <renovate-bot@3caravelle.com> Co-committed-by: Renovate Bot <renovate-bot@3caravelle.com>
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…fleeting-plugin-hetzner!384) 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)) | `3.8.4` → `3.8.5` |  |  | 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> ### [`v3.8.5`](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#385) [Compare Source](prettier/prettier@3.8.4...3.8.5) [diff](prettier/prettier@3.8.4...3.8.5) ##### Flow: Support `readonly` as a variance annotation ([#​19022](prettier/prettier#19022) by [@​marcoww6](https://github.com/marcoww6)) Flow now accepts `readonly` as a property variance annotation, equivalent to `+` (covariant/read-only). <!-- prettier-ignore --> ```jsx // Input type T = { readonly foo: string, }; // Prettier 3.8.4 SyntaxError // Prettier 3.8.5 type T = { readonly foo: string, }; ``` </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. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this MR, check this box --- This MR has been generated by [Mend Renovate](https://github.com/renovatebot/renovate). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My4yNDkuNSIsInVwZGF0ZWRJblZlciI6IjQzLjI0OS41IiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->
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This PR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [eslint](https://eslint.org) ([source](https://github.com/eslint/eslint)) | devDependencies | patch | [`9.39.4` -> `9.39.5`](https://renovatebot.com/diffs/npm/eslint/9.39.4/9.39.5) | | [prettier](https://prettier.io) ([source](https://github.com/prettier/prettier)) | devDependencies | minor | [`3.8.3` -> `3.9.10`](https://renovatebot.com/diffs/npm/prettier/3.8.3/3.9.10) | | [stylelint](https://stylelint.io) ([source](https://github.com/stylelint/stylelint)) | devDependencies | minor | [`17.12.0` -> `17.16.0`](https://renovatebot.com/diffs/npm/stylelint/17.12.0/17.16.0) | --- ### Release Notes <details> <summary>eslint/eslint (eslint)</summary> ### [`v9.39.5`](https://github.com/eslint/eslint/releases/tag/v9.39.5) [Compare Source](eslint/eslint@v9.39.4...v9.39.5) #### Bug Fixes - [`253be16`](eslint/eslint@253be16) fix: handle unavailable require cache (backport of [#​20812](eslint/eslint#20812) to v9.x) ([#​21065](eslint/eslint#21065)) (Eric) #### Documentation - [`74930ed`](eslint/eslint@74930ed) docs: switch build to Node.js 24 ([#​20894](eslint/eslint#20894)) (Milos Djermanovic) - [`eaec8bb`](eslint/eslint@eaec8bb) docs: Add ESLint v9.x EOL notice ([#​20828](eslint/eslint#20828)) (Milos Djermanovic) #### Chores - [`458205f`](eslint/eslint@458205f) chore: update `@eslint/eslintrc` and `@eslint/js` for v9.39.5 ([#​21077](eslint/eslint#21077)) (Francesco Trotta) - [`202117b`](eslint/eslint@202117b) chore: package.json update for [@​eslint/js](https://github.com/eslint/js) release (Jenkins) - [`d9eb6ed`](eslint/eslint@d9eb6ed) test: disable warning for `vm.constants.USE_MAIN_CONTEXT_DEFAULT_LOADER` ([#​21074](eslint/eslint#21074)) (Francesco Trotta) - [`7b431a7`](eslint/eslint@7b431a7) chore: override `re2` dependency for `@metascraper/helpers` ([#​21068](eslint/eslint#21068)) (Milos Djermanovic) - [`daf7791`](eslint/eslint@daf7791) chore: pin fflate@0.8.2 ([#​20895](eslint/eslint#20895)) (Milos Djermanovic) - [`daee8ba`](eslint/eslint@daee8ba) ci: use pnpm in `eslint-flat-config-utils` type integration test ([#​20829](eslint/eslint#20829)) (Milos Djermanovic) - [`116d4be`](eslint/eslint@116d4be) ci: unpin Node.js 25.x in CI ([#​20619](eslint/eslint#20619)) (Copilot) </details> <details> <summary>prettier/prettier (prettier)</summary> ### [`v3.9.10`](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#3910) [Compare Source](prettier/prettier@3.9.9...3.9.10) [diff](prettier/prettier@3.9.9...3.9.10) ##### Markdown: Update `micromark-extension-gfm-table` to fix the table parse issue on performance ([#​20266](prettier/prettier#20266) by [@​fisker](https://github.com/fisker)) See micromark/micromark-extension-gfm-table@4f43ead for details. ### [`v3.9.9`](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#399) [Compare Source](prettier/prettier@3.9.8...3.9.9) [diff](prettier/prettier@3.9.8...3.9.9) ##### Markdown: Fix text with `$` been incorrectly parsed as math syntax ([#​20140](prettier/prettier#20140) by [@​fisker](https://github.com/fisker)) <!-- prettier-ignore --> ```md <!-- Input --> **Uses $FOO** from `a.sh` and `b.sh`, plus `$BAR` from `c.sh`, before anything else runs here. <!-- Prettier 3.9.8 --> **Uses $FOO** from `a.sh` and `b.sh`, plus `$BAR`from`c.sh`, before anything else runs here. <!-- Prettier 3.9.9 --> **Uses $FOO** from `a.sh` and `b.sh`, plus `$BAR` from `c.sh`, before anything else runs here. ``` ### [`v3.9.8`](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#398) [Compare Source](prettier/prettier@3.9.7...3.9.8) [diff](prettier/prettier@3.9.7...3.9.8) ##### Markdown: Don't let Liquid objects interrupt paragraphs ([#​20087](prettier/prettier#20087) by [@​seiyab](https://github.com/seiyab)) <!-- prettier-ignore --> ```markdown <!-- Input --> If `module` is not a [`WebAssembly.Module`](/en-US/docs/WebAssembly/Reference/JavaScript_interface/Module) object instance, a {{jsxref("TypeError")}} is thrown. <!-- Prettier 3.9.7 --> If `module` is not a [`WebAssembly.Module`](/en-US/docs/WebAssembly/Reference/JavaScript_interface/Module) object instance, a {{jsxref("TypeError")}} is thrown. <!-- Prettier 3.9.8 --> If `module` is not a [`WebAssembly.Module`](/en-US/docs/WebAssembly/Reference/JavaScript_interface/Module) object instance, a {{jsxref("TypeError")}} is thrown. ``` ### [`v3.9.7`](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#397) [Compare Source](prettier/prettier@3.9.6...3.9.7) [diff](prettier/prettier@3.9.6...3.9.7) ##### Markdown: Prevent indentation drift in list-item code blocks ([#​19647](prettier/prettier#19647), [#​19990](prettier/prettier#19990) by [@​Austin1serb](https://github.com/Austin1serb), [@​giaBaoJS](https://github.com/giaBaoJS)) <!-- prettier-ignore --> ```markdown <!-- Input --> - [x] short first line. second paragraph at six spaces that wraps onto another line here. <!-- Prettier 3.9.6 --> - [x] short first line. second paragraph at six spaces that wraps onto another line here. <!-- Prettier 3.9.7 --> - [x] short first line. second paragraph at six spaces that wraps onto another line here. ``` ##### JavaScript: Fix embedded template literal idempotency ([#​19725](prettier/prettier#19725) by [@​fisker](https://github.com/fisker)) <!-- prettier-ignore --> ```jsx // Input const foo = html` <div>${getText({ value, })}</div> `; // Prettier 3.9.6 (first format) const foo = html` <div> ${getText({ value, })} </div> `; // Prettier 3.9.6 (second format) const foo = html` <div> ${getText({ value, })} </div> `; // Prettier 3.9.7 const foo = html` <div> ${getText({ value, })} </div> `; ``` ##### Markdown: Preserve Liquid blocks after Markdown tables ([#​19730](prettier/prettier#19730) by [@​wanxiankai](https://github.com/wanxiankai), [@​seiyab](https://github.com/seiyab)) <!-- prettier-ignore --> ```markdown <!-- Input --> | Argument | Type | | -------- | ---- | {% set default_params = { "model": ["str"], } %} <!-- Prettier 3.9.6 --> | Argument | Type | | ------------------------- | ---- | | {% set default_params = { | "model": ["str"], } %} <!-- Prettier 3.9.7 --> | Argument | Type | | -------- | ---- | {% set default_params = { "model": ["str"], } %} ``` ##### Markdown: Preserve single tildes in Markdown ([#​19739](prettier/prettier#19739) by [@​lazerg](https://github.com/lazerg)) Since 3.9.0, single-tilde spans like `H~2~O` were rewritten to double tildes, turning subscript syntax into strike-through. Only double tildes are treated that way now, matching GitHub. <!-- prettier-ignore --> ```markdown <!-- Input --> H~2~O <!-- Prettier 3.9.6 --> H~~2~~O <!-- Prettier 3.9.7 --> H~2~O ``` ##### Markdown: Fix Markdown blockquote containing `>` characters ([#​19802](prettier/prettier#19802) by [@​seiyab](https://github.com/seiyab)) <!-- prettier-ignore --> ```md <!-- Input --> > **test**\> <!-- Prettier 3.9.6 --> > **test**>\> <!-- Prettier 3.9.7 --> > **test**\> ``` ##### Markdown: Strip blockquote markers from a setext heading's continuation lines ([#​19878](prettier/prettier#19878) by [@​Kjubikstronk](https://github.com/Kjubikstronk)) A setext heading spanning multiple lines inside a blockquote kept the `>` marker of its continuation lines as literal text. <!-- prettier-ignore --> ```md <!-- Input --> > Multi > Line > === <!-- Prettier 3.9.6 --> > Multi > Line > === <!-- Prettier 3.9.7 --> > Multi > Line > === ``` ##### Markdown: Fix HTML block indentation drift in markdown list items ([#​19987](prettier/prettier#19987) by [@​lazerg](https://github.com/lazerg)) <!-- prettier-ignore --> ```markdown <!-- Input --> 1. Enable images: <p align="center"> <img alt="example"> </p> <!-- Prettier 3.9.6 (--tab-width=4) --> 1. Enable images: <p align="center"> <img alt="example"> </p> <!-- Prettier 3.9.7 (--tab-width=4) --> 1. Enable images: <p align="center"> <img alt="example"> </p> ``` ##### Angular: Support `@boundary` error boundaries ([#​20014](prettier/prettier#20014) by [@​Yahiro025](https://github.com/Yahiro025)) <!-- prettier-ignore --> ```html <!-- Input --> @​boundary { <complex-chart [data]="data"/> } @​error (let err) { <p>{{err.message}}</p> } <!-- Prettier 3.9.6 --> SyntaxError: Unexpected character "EOF" (Do you have an unescaped "{" in your template? Use "{{ '{' }}") to escape it.) (6:1) <!-- Prettier 3.9.7 --> @​boundary { <complex-chart [data]="data" /> } @​error (let err) { <p>{{ err.message }}</p> } ``` ### [`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)) <!-- prettier-ignore --> ```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)) <!-- prettier-ignore --> ```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. ### [`v3.9.5`](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#395) [Compare Source](prettier/prettier@3.9.4...3.9.5) [diff](prettier/prettier@3.9.4...3.9.5) ##### Markdown: Cap ordered list mark at 999,999,999 ([#​19351](prettier/prettier#19351) by [@​tats-u](https://github.com/tats-u)) CommonMark parsers only support ordered list item numbers up to 999,999,999. With this change, Prettier now caps the ordered list item number at 999,999,999 to ensure that the output is correctly parsed as an ordered list by CommonMark parsers. Numbers larger than 999,999,999 are not parsed as list item numbers and are left unchanged in the output: <!-- prettier-ignore --> ```markdown <!-- Input --> 999999998. text 999999998. text 999999998. text 999999998. text 1234567890123456789012) text <!-- Prettier 3.9.4 --> 999999998. text 999999999. text 1000000000. text 1000000001. text 1234567890123456789012) text <!-- Prettier 3.9.5 --> 999999998. text 999999999. text 999999999. text 999999999. text 1234567890123456789012) text ``` ##### Markdown: Avoid corrupting empty link with title ([#​19487](prettier/prettier#19487) by [@​andersk](https://github.com/andersk)) Do not remove `<>` from an inline link or image with an empty URL and a title, as this removal would change its interpretation. <!-- prettier-ignore --> ```md <!-- Input --> [link](<> "title") <!-- Prettier 3.9.4 --> [link]( "title") <!-- Prettier 3.9.5 --> [link](<> "title") ``` ##### Less: Remove extra spaces after `[` in map lookups ([#​19503](prettier/prettier#19503) by [@​kovsu](https://github.com/kovsu)) <!-- prettier-ignore --> ```less // Input .foo { color: #theme[ primary]; color: #theme[@​name]; color: #theme[@​@​name]; } // Prettier 3.9.4 .foo { color: #theme[ primary]; color: #theme[ @​name]; color: #theme[ @​@​name]; } // Prettier 3.9.5 .foo { color: #theme[primary]; color: #theme[@​name]; color: #theme[@​@​name]; } ``` ##### CSS: Prevent addition space in `type()` with `+` ([#​19516](prettier/prettier#19516) by [@​bigandy](https://github.com/bigandy)) This fixes the addition space before `+` in CSS `type()` declaration. For example `type(<number>+)` was being converted into `type(<number> +)` which is invalid CSS and does not work. <!-- prettier-ignore --> ```css /* Input */ div { border-radius: attr(br type(<length>+)); } /* Prettier 3.9.4 */ div { border-radius: attr(br type(<length> +)); } /* Prettier 3.9.5 */ div { border-radius: attr(br type(<length>+)); } ``` ##### Less: Remove spaces between merge markers and colons ([#​19517](prettier/prettier#19517) by [@​kovsu](https://github.com/kovsu)) <!-- prettier-ignore --> ```less // Input a { box-shadow + : 0 0 1px #​000; } // Prettier 3.9.4 a { box-shadow+ : 0 0 1px #​000; } // Prettier 3.9.5 a { box-shadow+: 0 0 1px #​000; } ``` ##### Markdown: Preserve wiki links with aliases ([#​19527](prettier/prettier#19527) by [@​kovsu](https://github.com/kovsu)) <!-- prettier-ignore --> ```markdown <!-- Input --> [[Foo:Bar]] <!-- Prettier 3.9.4 --> [[Foo]] <!-- Prettier 3.9.5 --> [[Foo:Bar]] ``` ##### TypeScript: Fix comments being dropped on shorthand `type` import/export specifiers ([#​19565](prettier/prettier#19565) by [@​kirkwaiblinger](https://github.com/kirkwaiblinger)) <!-- prettier-ignore --> ```tsx // Input export { type /* comment */ T } from "foo"; import { type /* comment */ T } from "foo"; // Prettier 3.9.4 Error: Comment "comment" was not printed. Please report this error! // Prettier 3.9.5 export { type /* comment */ T } from "foo"; import { type /* comment */ T } from "foo"; ``` ##### Miscellaneous: Preserving comments' `placement` property ([#​19567](prettier/prettier#19567) by [@​Janther](https://github.com/Janther)) Prettier@3.9.0 deleted an undocumented property on comments, which was already used by plugins, `comment.placement` is now available again after comment attach. ##### Flow: Stop enforcing empty module declaration to break ([#​19568](prettier/prettier#19568) by [@​fisker](https://github.com/fisker)) <!-- prettier-ignore --> ```flow // Input declare module "foo" {} // Prettier 3.9.4 declare module "foo" { } // Prettier 3.9.5 declare module "foo" {} ``` ##### Angular: Support expression for exhaustive typechecking ([#​19571](prettier/prettier#19571) by [@​fisker](https://github.com/fisker)) <!-- prettier-ignore --> ```html <!-- Input --> @​switch (state.mode) { @​default never(state); } <!-- Prettier 3.9.4 --> @​switch (state.mode) { @​default never; } <!-- Prettier 3.9.5 --> @​switch (state.mode) { @​default never(state); } ``` ##### TypeScript: Ignore comments inside mapped type when checking type parameter comments ([#​19572](prettier/prettier#19572) by [@​fisker](https://github.com/fisker)) <!-- prettier-ignore --> ```tsx // Input foo<{ // comment [key in keyof Foo]: number }>(); // Prettier 3.9.4 foo< { // comment [key in keyof Foo]: number; } >(); // Prettier 3.9.5 foo<{ // comment [key in keyof Foo]: number; }>(); ``` ##### Less: Fix adjacent block comments being corrupted ([#​19574](prettier/prettier#19574) by [@​kovsu](https://github.com/kovsu)) <!-- prettier-ignore --> ```less // Input /* a *//* b */ /* a */* { color: red; } // Prettier 3.9.4 /* a */ /* b */ /* a * { color: red; } // Prettier 3.9.5 /* a */ /* b */ /* a */ * { color: red; } ``` ##### JavaScript: Handle dangling comments in `SwitchStatement` ([#​19581](prettier/prettier#19581) by [@​fisker](https://github.com/fisker)) <!-- prettier-ignore --> ```jsx // Input switch (foo) { // comment } // Prettier 3.9.4 switch ( foo // comment ) { } // Prettier 3.9.5 switch (foo) { // comment } ``` ##### TypeScript: Remove space in comment-only object type ([#​19583](prettier/prettier#19583) by [@​fisker](https://github.com/fisker)) <!-- prettier-ignore --> ```tsx // Input var foo = { /* comment */ }; type Foo = { /* comment */ }; // Prettier 3.9.4 var foo = {/* comment */}; type Foo = { /* comment */ }; // Prettier 3.9.5 var foo = {/* comment */}; type Foo = {/* comment */}; ``` ### [`v3.9.4`](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#394) [Compare Source](prettier/prettier@3.9.3...3.9.4) [diff](prettier/prettier@3.9.3...3.9.4) ##### Angular: Format `@content(name)` -> `@content (name)` to align with other block syntax ([#​19499](prettier/prettier#19499) by [@​fisker](https://github.com/fisker)) <!-- prettier-ignore --> ```html <!-- Input --> <FancyButton [label]="title"> @​content (icon) { <span>Icon!</span> } @​content (description) { <span>Description text</span> } <span>Other children</span> </FancyButton> <!-- Prettier 3.9.3 --> <FancyButton [label]="title"> @​content(icon) { <span>Icon!</span> } @​content(description) { <span>Description text</span> } <span>Other children</span> </FancyButton> <!-- Prettier 3.9.4 --> <FancyButton [label]="title"> @​content (icon) { <span>Icon!</span> } @​content (description) { <span>Description text</span> } <span>Other children</span> </FancyButton> ``` ### [`v3.9.3`](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#393) [Compare Source](prettier/prettier@3.9.2...3.9.3) [diff](prettier/prettier@3.9.1...3.9.3) ##### Markdown: Fix unexpected removal of characters in liquid syntax ([#​19489](prettier/prettier#19489) by [@​seiyab](https://github.com/seiyab)) <!-- prettier-ignore --> ```md // Input <!-- Input --> {{ page.title }} text <!-- Prettier 3.9.1 --> {{ page.title text <!-- Prettier 3.9.3 --> {{ page.title }} text ``` ##### TypeScript: Allow decorators to be used with declare on class fields ([#​19492](prettier/prettier#19492) by [@​evoactivity](https://github.com/evoactivity)) Extensively used within the Ember ecosystem, decorators with `declare` on class fields will ignore the babel parser error and allow Prettier to format the code without breaking it. <!-- prettier-ignore --> ```ts // Input export default class ProjectStatusComponent extends Component<ProjectStatusSig> { @​service declare server: ServerService; } // Prettier 3.9.1 // SyntaxError: Decorators can't be used with a declare field. (2:3) // 1 | export default class ProjectStatusComponent extends Component<ProjectStatusSig> { //> 2 | @​service declare server: ServerService; // | ^ // 3 | } // Prettier 3.9.3 export default class ProjectStatusComponent extends Component<ProjectStatusSig> { @​service declare server: ServerService; } ``` ### [`v3.9.2`](prettier/prettier@3.9.1...3.9.2) [Compare Source](prettier/prettier@3.9.1...3.9.2) ### [`v3.9.1`](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#3910) [Compare Source](prettier/prettier@3.9.0...3.9.1) [diff](prettier/prettier@3.9.9...3.9.10) ##### Markdown: Update `micromark-extension-gfm-table` to fix the table parse issue on performance ([#​20266](prettier/prettier#20266) by [@​fisker](https://github.com/fisker)) See micromark/micromark-extension-gfm-table@4f43ead for details. ### [`v3.9.0`](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#390) [Compare Source](prettier/prettier@3.8.5...3.9.0) [diff](prettier/prettier@3.8.5...3.9.0) 🔗 [Release Notes](https://prettier.io/blog/2026/06/27/3.9.0) ### [`v3.8.5`](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#385) [Compare Source](prettier/prettier@3.8.4...3.8.5) [diff](prettier/prettier@3.8.4...3.8.5) ##### Flow: Support `readonly` as a variance annotation ([#​19022](prettier/prettier#19022) by [@​marcoww6](https://github.com/marcoww6)) Flow now accepts `readonly` as a property variance annotation, equivalent to `+` (covariant/read-only). <!-- prettier-ignore --> ```jsx // Input type T = { readonly foo: string, }; // Prettier 3.8.4 SyntaxError // Prettier 3.8.5 type T = { readonly foo: string, }; ``` ### [`v3.8.4`](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#384) [Compare Source](prettier/prettier@3.8.3...3.8.4) [diff](prettier/prettier@3.8.3...3.8.4) ##### Markdown: Fix blank lines between list items and nested sub-lists being removed in Markdown/MDX ([#​17746](prettier/prettier#17746) by [@​byplayer](https://github.com/byplayer)) Prettier was removing blank lines between list items and their nested sub-lists, converting loose lists into tight lists and changing their semantic meaning. <!-- prettier-ignore --> ```markdown <!-- Input --> - a - b - c - d <!-- Prettier 3.8.3 --> - a - b - c - d <!-- Prettier 3.8.4 --> - a - b - c - d ``` </details> <details> <summary>stylelint/stylelint (stylelint)</summary> ### [`v17.16.0`](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#17160---2026-10-01) [Compare Source](stylelint/stylelint@17.15.0...17.16.0) It fixes 2 bugs in the `layout-mappings` rules. This will likely be the last `17.x` release, as we prepare for `18.0.0`. - Fixed: `property-layout-mappings` and `unit-layout-mappings` false negatives for uppercase property names and units ([#​9485](stylelint/stylelint#9485)) ([@​giaBaoJS](https://github.com/giaBaoJS)). - Fixed: `value-keyword-layout-mappings` false positives for `caption-side` ([#​9483](stylelint/stylelint#9483)) ([@​giaBaoJS](https://github.com/giaBaoJS)). ### [`v17.15.0`](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#17150---2026-09-04) [Compare Source](stylelint/stylelint@17.14.1...17.15.0) It adds 1 new rule and 2 new rule options, and fixes 4 bugs. - Added: `selector-no-unmatchable` rule ([#​9451](stylelint/stylelint#9451)) ([@​jeddy3](https://github.com/jeddy3)). - Added: `ignoreFunctions: []` to `color-named` and `color-no-hex` ([#​9463](stylelint/stylelint#9463)) ([@​jsmitty12](https://github.com/jsmitty12)). - Fixed: `custom-property-no-missing-var-function` false positives for anchor positioning ([#​9466](stylelint/stylelint#9466)) ([@​giaBaoJS](https://github.com/giaBaoJS)). - Fixed: `declaration-block-no-redundant-longhand-properties` autofix for `font` shorthand ([#​9402](stylelint/stylelint#9402)) ([@​sarathfrancis90](https://github.com/sarathfrancis90)). - Fixed: `declaration-property-max-values` false positives for interpolated inline expressions ([#​9437](stylelint/stylelint#9437)) ([@​alexchen-sys](https://github.com/alexchen-sys)). - Fixed: `selector-no-invalid` false negatives for pseudo-elements, combinators and nested `:has()` ([#​9452](stylelint/stylelint#9452)) ([@​jeddy3](https://github.com/jeddy3)). ### [`v17.14.1`](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#17141---2026-07-20) [Compare Source](stylelint/stylelint@17.14.0...17.14.1) It fixes 4 bugs. - Fixed: `quiet` option suppresses `report*` warning reports ([#​9387](stylelint/stylelint#9387)) ([@​ychampion](https://github.com/ychampion)). - Fixed: reported range of unknown rules ([#​9385](stylelint/stylelint#9385)) ([@​ybiquitous](https://github.com/ybiquitous)). - Fixed: `declaration-block-no-redundant-longhand-properties` autofix producing invalid `background` shorthand when `background-size` is present ([#​9364](stylelint/stylelint#9364)) ([@​sarathfrancis90](https://github.com/sarathfrancis90)). - Fixed: `rule-empty-line-before` false positives for shared-line comments with `except: ["after-single-line-comment"]` ([#​9394](stylelint/stylelint#9394)) ([@​sarathfrancis90](https://github.com/sarathfrancis90)). ### [`v17.14.0`](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#17140---2026-06-25) [Compare Source](stylelint/stylelint@17.13.0...17.14.0) It fixes 3 bugs, including a false negative one. - Fixed: performance of getting module paths ([#​9354](stylelint/stylelint#9354)) ([@​jeddy3](https://github.com/jeddy3)). - Fixed: performance by dynamically importing `TIMING` only on use ([#​9356](stylelint/stylelint#9356)) ([@​jeddy3](https://github.com/jeddy3)). - Fixed: `function-calc-no-unspaced-operator` false negatives for unspaced `+` and `-` operators following a `*` or `/` operator ([#​9357](stylelint/stylelint#9357)) ([@​sarathfrancis90](https://github.com/sarathfrancis90)). ### [`v17.13.0`](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#17130---2026-06-06) [Compare Source](stylelint/stylelint@17.12.0...17.13.0) It fixes 3 bugs, including a false negative one. - Fixed: `declaration-block-no-duplicate-properties` false negatives for interleaved non-consecutive duplicates with `ignore: ["consecutive-duplicates(-*)"]` ([#​9324](stylelint/stylelint#9324)) ([@​sarathfrancis90](https://github.com/sarathfrancis90)). - Fixed: `selector-max-type` false positives for nested selectors ([#​9319](stylelint/stylelint#9319)) ([@​romainmenke](https://github.com/romainmenke)). - Fixed: `selector-type-no-unknown` false positives for `install` ([#​9308](stylelint/stylelint#9308)) ([@​Mouvedia](https://github.com/Mouvedia)). </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. 👻 **Immortal**: This PR will be recreated if closed unmerged. Get [config help](https://github.com/renovatebot/renovate/discussions) if that's undesired. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0MS42MS4wIiwidXBkYXRlZEluVmVyIjoiNDEuNjEuMCIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOltdfQ==--> Reviewed-on: https://git.robbevp.be/robbevp/website-robbevanpetegem/pulls/511
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##### [v3.9.10](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#3910) [diff](prettier/prettier@3.9.9...3.9.10) ##### Markdown: Update `micromark-extension-gfm-table` to fix the table parse issue on performance ([#20266](prettier/prettier#20266) by [@fisker](https://github.com/fisker)) See [micromark/micromark-extension-gfm-table@`4f43ead`](micromark/micromark-extension-gfm-table@4f43ead) for details. ##### [v3.9.9](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#399) [diff](prettier/prettier@3.9.8...3.9.9) ##### Markdown: Fix text with `$` been incorrectly parsed as math syntax ([#20140](prettier/prettier#20140) by [@fisker](https://github.com/fisker)) <!-- prettier-ignore --> ```md <!-- Input --> **Uses $FOO** from `a.sh` and `b.sh`, plus `$BAR` from `c.sh`, before anything else runs here. <!-- Prettier 3.9.8 --> **Uses $FOO** from `a.sh` and `b.sh`, plus `$BAR`from`c.sh`, before anything else runs here. <!-- Prettier 3.9.9 --> **Uses $FOO** from `a.sh` and `b.sh`, plus `$BAR` from `c.sh`, before anything else runs here. ``` ##### [v3.9.8](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#398) [diff](prettier/prettier@3.9.7...3.9.8) ##### Markdown: Don't let Liquid objects interrupt paragraphs ([#20087](prettier/prettier#20087) by [@seiyab](https://github.com/seiyab)) <!-- prettier-ignore --> ```markdown <!-- Input --> If `module` is not a [`WebAssembly.Module`](/en-US/docs/WebAssembly/Reference/JavaScript_interface/Module) object instance, a {{jsxref("TypeError")}} is thrown. <!-- Prettier 3.9.7 --> If `module` is not a [`WebAssembly.Module`](/en-US/docs/WebAssembly/Reference/JavaScript_interface/Module) object instance, a {{jsxref("TypeError")}} is thrown. <!-- Prettier 3.9.8 --> If `module` is not a [`WebAssembly.Module`](/en-US/docs/WebAssembly/Reference/JavaScript_interface/Module) object instance, a {{jsxref("TypeError")}} is thrown. ``` ##### [v3.9.7](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#397) [diff](prettier/prettier@3.9.6...3.9.7) ##### Markdown: Prevent indentation drift in list-item code blocks ([#19647](prettier/prettier#19647), [#19990](prettier/prettier#19990) by [@Austin1serb](https://github.com/Austin1serb), [@giaBaoJS](https://github.com/giaBaoJS)) <!-- prettier-ignore --> ```markdown <!-- Input --> - [x] short first line. second paragraph at six spaces that wraps onto another line here. <!-- Prettier 3.9.6 --> - [x] short first line. second paragraph at six spaces that wraps onto another line here. <!-- Prettier 3.9.7 --> - [x] short first line. second paragraph at six spaces that wraps onto another line here. ``` ##### JavaScript: Fix embedded template literal idempotency ([#19725](prettier/prettier#19725) by [@fisker](https://github.com/fisker)) <!-- prettier-ignore --> ```jsx // Input const foo = html` <div>${getText({ value, })}</div> `; // Prettier 3.9.6 (first format) const foo = html` <div> ${getText({ value, })} </div> `; // Prettier 3.9.6 (second format) const foo = html` <div> ${getText({ value, })} </div> `; // Prettier 3.9.7 const foo = html` <div> ${getText({ value, })} </div> `; ``` ##### Markdown: Preserve Liquid blocks after Markdown tables ([#19730](prettier/prettier#19730) by [@wanxiankai](https://github.com/wanxiankai), [@seiyab](https://github.com/seiyab)) <!-- prettier-ignore --> ```markdown <!-- Input --> | Argument | Type | | -------- | ---- | {% set default_params = { "model": ["str"], } %} <!-- Prettier 3.9.6 --> | Argument | Type | | ------------------------- | ---- | | {% set default_params = { | "model": ["str"], } %} <!-- Prettier 3.9.7 --> | Argument | Type | | -------- | ---- | {% set default_params = { "model": ["str"], } %} ``` ##### Markdown: Preserve single tildes in Markdown ([#19739](prettier/prettier#19739) by [@lazerg](https://github.com/lazerg)) Since 3.9.0, single-tilde spans like `H~2~O` were rewritten to double tildes, turning subscript syntax into strike-through. Only double tildes are treated that way now, matching GitHub. <!-- prettier-ignore --> ```markdown <!-- Input --> H~2~O <!-- Prettier 3.9.6 --> H~~2~~O <!-- Prettier 3.9.7 --> H~2~O ``` ##### Markdown: Fix Markdown blockquote containing `>` characters ([#19802](prettier/prettier#19802) by [@seiyab](https://github.com/seiyab)) <!-- prettier-ignore --> ```md <!-- Input --> > **test**\> <!-- Prettier 3.9.6 --> > **test**>\> <!-- Prettier 3.9.7 --> > **test**\> ``` ##### Markdown: Strip blockquote markers from a setext heading's continuation lines ([#19878](prettier/prettier#19878) by [@Kjubikstronk](https://github.com/Kjubikstronk)) A setext heading spanning multiple lines inside a blockquote kept the `>` marker of its continuation lines as literal text. <!-- prettier-ignore --> ```md <!-- Input --> > Multi > Line > === <!-- Prettier 3.9.6 --> > Multi > Line > === <!-- Prettier 3.9.7 --> > Multi > Line > === ``` ##### Markdown: Fix HTML block indentation drift in markdown list items ([#19987](prettier/prettier#19987) by [@lazerg](https://github.com/lazerg)) <!-- prettier-ignore --> ```markdown <!-- Input --> 1. Enable images: <p align="center"> <img alt="example"> </p> <!-- Prettier 3.9.6 (--tab-width=4) --> 1. Enable images: <p align="center"> <img alt="example"> </p> <!-- Prettier 3.9.7 (--tab-width=4) --> 1. Enable images: <p align="center"> <img alt="example"> </p> ``` ##### Angular: Support `@boundary` error boundaries ([#20014](prettier/prettier#20014) by [@Yahiro025](https://github.com/Yahiro025)) <!-- prettier-ignore --> ```html <!-- Input --> @boundary { <complex-chart [data]="data"/> } @error (let err) { <p>{{err.message}}</p> } <!-- Prettier 3.9.6 --> SyntaxError: Unexpected character "EOF" (Do you have an unescaped "{" in your template? Use "{{ '{' }}") to escape it.) (6:1) <!-- Prettier 3.9.7 --> @boundary { <complex-chart [data]="data" /> } @error (let err) { <p>{{ err.message }}</p> } ``` ##### [v3.9.6](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#396) [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)) <!-- prettier-ignore --> ```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)) <!-- prettier-ignore --> ```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. ##### [v3.9.5](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#395) [diff](prettier/prettier@3.9.4...3.9.5) ##### Markdown: Cap ordered list mark at 999,999,999 ([#19351](prettier/prettier#19351) by [@tats-u](https://github.com/tats-u)) CommonMark parsers only support ordered list item numbers up to 999,999,999. With this change, Prettier now caps the ordered list item number at 999,999,999 to ensure that the output is correctly parsed as an ordered list by CommonMark parsers. Numbers larger than 999,999,999 are not parsed as list item numbers and are left unchanged in the output: <!-- prettier-ignore --> ```markdown <!-- Input --> 999999998. text 999999998. text 999999998. text 999999998. text 1234567890123456789012) text <!-- Prettier 3.9.4 --> 999999998. text 999999999. text 1000000000. text 1000000001. text 1234567890123456789012) text <!-- Prettier 3.9.5 --> 999999998. text 999999999. text 999999999. text 999999999. text 1234567890123456789012) text ``` ##### Markdown: Avoid corrupting empty link with title ([#19487](prettier/prettier#19487) by [@andersk](https://github.com/andersk)) Do not remove `<>` from an inline link or image with an empty URL and a title, as this removal would change its interpretation. <!-- prettier-ignore --> ```md <!-- Input --> [link](<> "title") <!-- Prettier 3.9.4 --> [link]( "title") <!-- Prettier 3.9.5 --> [link](<> "title") ``` ##### Less: Remove extra spaces after `[` in map lookups ([#19503](prettier/prettier#19503) by [@kovsu](https://github.com/kovsu)) <!-- prettier-ignore --> ```less // Input .foo { color: #theme[ primary]; color: #theme[@name]; color: #theme[@@name]; } // Prettier 3.9.4 .foo { color: #theme[ primary]; color: #theme[ @name]; color: #theme[ @@name]; } // Prettier 3.9.5 .foo { color: #theme[primary]; color: #theme[@name]; color: #theme[@@name]; } ``` ##### CSS: Prevent addition space in `type()` with `+` ([#19516](prettier/prettier#19516) by [@bigandy](https://github.com/bigandy)) This fixes the addition space before `+` in CSS `type()` declaration. For example `type(<number>+)` was being converted into `type(<number> +)` which is invalid CSS and does not work. <!-- prettier-ignore --> ```css /* Input */ div { border-radius: attr(br type(<length>+)); } /* Prettier 3.9.4 */ div { border-radius: attr(br type(<length> +)); } /* Prettier 3.9.5 */ div { border-radius: attr(br type(<length>+)); } ``` ##### Less: Remove spaces between merge markers and colons ([#19517](prettier/prettier#19517) by [@kovsu](https://github.com/kovsu)) <!-- prettier-ignore --> ```less // Input a { box-shadow + : 0 0 1px #000; } // Prettier 3.9.4 a { box-shadow+ : 0 0 1px #000; } // Prettier 3.9.5 a { box-shadow+: 0 0 1px #000; } ``` ##### Markdown: Preserve wiki links with aliases ([#19527](prettier/prettier#19527) by [@kovsu](https://github.com/kovsu)) <!-- prettier-ignore --> ```markdown <!-- Input --> [[Foo:Bar]] <!-- Prettier 3.9.4 --> [[Foo]] <!-- Prettier 3.9.5 --> [[Foo:Bar]] ``` ##### TypeScript: Fix comments being dropped on shorthand `type` import/export specifiers ([#19565](prettier/prettier#19565) by [@kirkwaiblinger](https://github.com/kirkwaiblinger)) <!-- prettier-ignore --> ```tsx // Input export { type /* comment */ T } from "foo"; import { type /* comment */ T } from "foo"; // Prettier 3.9.4 Error: Comment "comment" was not printed. Please report this error! // Prettier 3.9.5 export { type /* comment */ T } from "foo"; import { type /* comment */ T } from "foo"; ``` ##### Miscellaneous: Preserving comments' `placement` property ([#19567](prettier/prettier#19567) by [@Janther](https://github.com/Janther)) Prettier\@3.9.0 deleted an undocumented property on comments, which was already used by plugins, `comment.placement` is now available again after comment attach. ##### Flow: Stop enforcing empty module declaration to break ([#19568](prettier/prettier#19568) by [@fisker](https://github.com/fisker)) <!-- prettier-ignore --> ```flow // Input declare module "foo" {} // Prettier 3.9.4 declare module "foo" { } // Prettier 3.9.5 declare module "foo" {} ``` ##### Angular: Support expression for exhaustive typechecking ([#19571](prettier/prettier#19571) by [@fisker](https://github.com/fisker)) <!-- prettier-ignore --> ```html <!-- Input --> @switch (state.mode) { @default never(state); } <!-- Prettier 3.9.4 --> @switch (state.mode) { @default never; } <!-- Prettier 3.9.5 --> @switch (state.mode) { @default never(state); } ``` ##### TypeScript: Ignore comments inside mapped type when checking type parameter comments ([#19572](prettier/prettier#19572) by [@fisker](https://github.com/fisker)) <!-- prettier-ignore --> ```tsx // Input foo<{ // comment [key in keyof Foo]: number }>(); // Prettier 3.9.4 foo< { // comment [key in keyof Foo]: number; } >(); // Prettier 3.9.5 foo<{ // comment [key in keyof Foo]: number; }>(); ``` ##### Less: Fix adjacent block comments being corrupted ([#19574](prettier/prettier#19574) by [@kovsu](https://github.com/kovsu)) <!-- prettier-ignore --> ```less // Input /* a *//* b */ /* a */* { color: red; } // Prettier 3.9.4 /* a */ /* b */ /* a * { color: red; } // Prettier 3.9.5 /* a */ /* b */ /* a */ * { color: red; } ``` ##### JavaScript: Handle dangling comments in `SwitchStatement` ([#19581](prettier/prettier#19581) by [@fisker](https://github.com/fisker)) <!-- prettier-ignore --> ```jsx // Input switch (foo) { // comment } // Prettier 3.9.4 switch ( foo // comment ) { } // Prettier 3.9.5 switch (foo) { // comment } ``` ##### TypeScript: Remove space in comment-only object type ([#19583](prettier/prettier#19583) by [@fisker](https://github.com/fisker)) <!-- prettier-ignore --> ```tsx // Input var foo = { /* comment */ }; type Foo = { /* comment */ }; // Prettier 3.9.4 var foo = {/* comment */}; type Foo = { /* comment */ }; // Prettier 3.9.5 var foo = {/* comment */}; type Foo = {/* comment */}; ``` ##### [v3.9.4](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#394) [diff](prettier/prettier@3.9.3...3.9.4) ##### Angular: Format `@content(name)` -> `@content (name)` to align with other block syntax ([#19499](prettier/prettier#19499) by [@fisker](https://github.com/fisker)) <!-- prettier-ignore --> ```html <!-- Input --> <FancyButton [label]="title"> @content (icon) { <span>Icon!</span> } @content (description) { <span>Description text</span> } <span>Other children</span> </FancyButton> <!-- Prettier 3.9.3 --> <FancyButton [label]="title"> @content(icon) { <span>Icon!</span> } @content(description) { <span>Description text</span> } <span>Other children</span> </FancyButton> <!-- Prettier 3.9.4 --> <FancyButton [label]="title"> @content (icon) { <span>Icon!</span> } @content (description) { <span>Description text</span> } <span>Other children</span> </FancyButton> ``` ##### [v3.9.3](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#393) [diff](prettier/prettier@3.9.1...3.9.3) ##### Markdown: Fix unexpected removal of characters in liquid syntax ([#19489](prettier/prettier#19489) by [@seiyab](https://github.com/seiyab)) <!-- prettier-ignore --> ```md // Input <!-- Input --> {{ page.title }} text <!-- Prettier 3.9.1 --> {{ page.title text <!-- Prettier 3.9.3 --> {{ page.title }} text ``` ##### TypeScript: Allow decorators to be used with declare on class fields ([#19492](prettier/prettier#19492) by [@evoactivity](https://github.com/evoactivity)) Extensively used within the Ember ecosystem, decorators with `declare` on class fields will ignore the babel parser error and allow Prettier to format the code without breaking it. <!-- prettier-ignore --> ```ts // Input export default class ProjectStatusComponent extends Component<ProjectStatusSig> { @service declare server: ServerService; } // Prettier 3.9.1 // SyntaxError: Decorators can't be used with a declare field. (2:3) // 1 | export default class ProjectStatusComponent extends Component<ProjectStatusSig> { //> 2 | @service declare server: ServerService; // | ^ // 3 | } // Prettier 3.9.3 export default class ProjectStatusComponent extends Component<ProjectStatusSig> { @service declare server: ServerService; } ``` ##### [v3.9.2](prettier/prettier@3.9.1...3.9.2) ##### [v3.9.1](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#3910) [diff](prettier/prettier@3.9.9...3.9.10) ##### Markdown: Update `micromark-extension-gfm-table` to fix the table parse issue on performance ([#20266](prettier/prettier#20266) by [@fisker](https://github.com/fisker)) See [micromark/micromark-extension-gfm-table@`4f43ead`](micromark/micromark-extension-gfm-table@4f43ead) for details. ##### [v3.9.0](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#390) [diff](prettier/prettier@3.8.5...3.9.0) 🔗 [Release Notes](https://prettier.io/blog/2026/06/27/3.9.0) ##### [v3.8.5](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#385) [diff](prettier/prettier@3.8.4...3.8.5) ##### Flow: Support `readonly` as a variance annotation ([#19022](prettier/prettier#19022) by [@marcoww6](https://github.com/marcoww6)) Flow now accepts `readonly` as a property variance annotation, equivalent to `+` (covariant/read-only). <!-- prettier-ignore --> ```jsx // Input type T = { readonly foo: string, }; // Prettier 3.8.4 SyntaxError // Prettier 3.8.5 type T = { readonly foo: string, }; ``` ##### [v3.8.4](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#384) [diff](prettier/prettier@3.8.3...3.8.4) ##### Markdown: Fix blank lines between list items and nested sub-lists being removed in Markdown/MDX ([#17746](prettier/prettier#17746) by [@byplayer](https://github.com/byplayer)) Prettier was removing blank lines between list items and their nested sub-lists, converting loose lists into tight lists and changing their semantic meaning. <!-- prettier-ignore --> ```markdown <!-- Input --> - a - b - c - d <!-- Prettier 3.8.3 --> - a - b - c - d <!-- Prettier 3.8.4 --> - a - b - c - d ``` ##### [v3.8.3](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#383) [diff](prettier/prettier@3.8.2...3.8.3) ##### SCSS: Prevent trailing comma in `if()` function ([#18471](prettier/prettier#18471) by [@kovsu](https://github.com/kovsu)) <!-- prettier-ignore --> ```scss // Input $value: if(sass(false): 1; else: -1); // Prettier 3.8.2 $value: if( sass(false): 1; else: -1, ); // Prettier 3.8.3 $value: if(sass(false): 1; else: -1); ``` ##### [v3.8.2](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#382) [diff](prettier/prettier@3.8.1...3.8.2) ##### Angular: Support Angular v21.2 ([#18722](prettier/prettier#18722), [#19034](prettier/prettier#19034) by [@fisker](https://github.com/fisker)) Exhaustive typechecking with `@default never;` <!-- prettier-ignore --> ```html <!-- Input --> @switch (foo) { @case (1) {} @default never; } <!-- Prettier 3.8.1 --> SyntaxError: Incomplete block "default never". If you meant to write the @ character, you should use the "@" HTML entity instead. (3:3) <!-- Prettier 3.8.2 --> @switch (foo) { @case (1) {} @default never; } ``` `arrow function` and `instanceof` expressions. <!-- prettier-ignore --> ```html <!-- Input --> @let fn = (a) => a? 1:2; {{ fn ( a instanceof b)}} <!-- Prettier 3.8.1 --> @let fn = (a) => a? 1:2; {{ fn ( a instanceof b)}} <!-- Prettier 3.8.2 --> @let fn = (a) => (a ? 1 : 2); {{ fn(a instanceof b) }} ``` ##### [v3.8.1](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#381) [diff](prettier/prettier@3.8.0...3.8.1) ##### Include available `printers` in plugin type declarations ([#18706](prettier/prettier#18706) by [@porada](https://github.com/porada)) <!-- prettier-ignore --> ```ts // Input import * as prettierPluginEstree from "prettier/plugins/estree"; // Prettier 3.8.0 // Property 'printers' does not exist on type 'typeof import("prettier/plugins/estree")'. ts(2339) prettierPluginEstree.printers.estree; //=> any // Prettier 3.8.1 prettierPluginEstree.printers.estree; //=> Printer prettierPluginEstree.printers["estree-json"]; //=> Printer ``` ##### [v3.8.0](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#380) [diff](prettier/prettier@3.7.4...3.8.0) 🔗 [Release Notes](https://prettier.io/blog/2026/01/14/3.8.0) ##### [v3.7.4](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#374) [diff](prettier/prettier@3.7.3...3.7.4) ##### LWC: Avoid quote around interpolations ([#18383](prettier/prettier#18383) by [@kovsu](https://github.com/kovsu)) <!-- prettier-ignore --> ```html <!-- Input --> <div foo={bar}> </div> <!-- Prettier 3.7.3 (--embedded-language-formatting off) --> <div foo="{bar}"></div> <!-- Prettier 3.7.4 (--embedded-language-formatting off) --> <div foo={bar}></div> ``` ##### TypeScript: Fix comment inside union type gets duplicated ([#18393](prettier/prettier#18393) by [@fisker](https://github.com/fisker)) <!-- prettier-ignore --> ```tsx // Input type Foo = (/** comment */ a | b) | c; // Prettier 3.7.3 type Foo = /** comment */ (/** comment */ a | b) | c; // Prettier 3.7.4 type Foo = /** comment */ (a | b) | c; ``` ##### TypeScript: Fix unstable comment print in union type comments ([#18395](prettier/prettier#18395) by [@fisker](https://github.com/fisker)) <!-- prettier-ignore --> ```tsx // Input type X = (A | B) & ( // comment A | B ); // Prettier 3.7.3 (first format) type X = (A | B) & (// comment A | B); // Prettier 3.7.3 (second format) type X = ( | A | B // comment ) & (A | B); // Prettier 3.7.4 type X = (A | B) & // comment (A | B); ``` ##### [v3.7.3](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#373) [diff](prettier/prettier@3.7.2...3.7.3) ##### API: Fix `prettier.getFileInfo()` change that breaks VSCode extension ([#18375](prettier/prettier#18375) by [@fisker](https://github.com/fisker)) An internal refactor accidentally broke the VSCode extension plugin loading. ##### [v3.7.2](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#372) [diff](prettier/prettier@3.7.1...3.7.2) ##### JavaScript: Fix string print when switching quotes ([#18351](prettier/prettier#18351) by [@fisker](https://github.com/fisker)) <!-- prettier-ignore --> ```jsx // Input console.log("A descriptor\\'s .kind must be \"method\" or \"field\".") // Prettier 3.7.1 console.log('A descriptor\\'s .kind must be "method" or "field".'); // Prettier 3.7.2 console.log('A descriptor\\\'s .kind must be "method" or "field".'); ``` ##### JavaScript: Preserve quote for embedded HTML attribute values ([#18352](prettier/prettier#18352) by [@kovsu](https://github.com/kovsu)) <!-- prettier-ignore --> ```tsx // Input const html = /* HTML */ ` <div class="${styles.banner}"></div> `; // Prettier 3.7.1 const html = /* HTML */ ` <div class=${styles.banner}></div> `; // Prettier 3.7.2 const html = /* HTML */ ` <div class="${styles.banner}"></div> `; ``` ##### TypeScript: Fix comment in empty type literal ([#18364](prettier/prettier#18364) by [@fisker](https://github.com/fisker)) <!-- prettier-ignore --> ```tsx // Input export type XXX = { // tbd }; // Prettier 3.7.1 export type XXX = { // tbd }; // Prettier 3.7.2 export type XXX = { // tbd }; ``` ##### [v3.7.1](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#371) [diff](prettier/prettier@3.7.0...3.7.1) ##### API: Fix performance regression in doc printer ([#18342](prettier/prettier#18342) by [@fisker](https://github.com/fisker)) Prettier 3.7.0 can be very slow when formatting big files, the regression has been fixed. ##### [v3.7.0](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#370) [diff](prettier/prettier@3.6.2...3.7.0) 🔗 [Release Notes](https://prettier.io/blog/2025/11/27/3.7.0)
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Description
Flow now accepts
readonlyas a property variance annotation equivalent to+(covariant/read-only).Variancenode printer to handlekind: "readonly"Variancetype definition to include"readonly"in the kind unionVariancenodes withkind: "readonly"readonlyvariance in object types, indexers, tuples, interfaces, and class propertiesChecklist
docs/directory).changelog_unreleased/*/XXXX.mdfile followingchangelog_unreleased/TEMPLATE.md.