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Support default never in Angular v21.2#19034

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fisker merged 1 commit intoprettier:mainfrom
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Apr 10, 2026
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Support default never in Angular v21.2#19034
fisker merged 1 commit intoprettier:mainfrom
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@fisker fisker commented Apr 10, 2026

Description

Fixes #18966, changelog will be added in #18722

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.
  • I’ve read the contributing guidelines.

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yarn add https://pkg.pr.new/@prettier/[email protected]
yarn add https://pkg.pr.new/@prettier/[email protected]
yarn add https://pkg.pr.new/[email protected]

commit: 7872b85

@fisker fisker marked this pull request as ready for review April 10, 2026 01:46
@fisker fisker merged commit 375f334 into prettier:main Apr 10, 2026
41 checks passed
@fisker fisker deleted the default-never branch April 10, 2026 01:49
fisker added a commit that referenced this pull request Apr 10, 2026
apricote pushed a commit to hetznercloud/fleeting-plugin-hetzner that referenced this pull request Apr 10, 2026
…fleeting-plugin-hetzner!364)

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)) | `3.8.1` → `3.8.2` | ![age](https://developer.mend.io/api/mc/badges/age/npm/prettier/3.8.2?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/prettier/3.8.1/3.8.2?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>

### [`v3.8.2`](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#382)

[Compare Source](prettier/prettier@3.8.1...3.8.2)

[diff](prettier/prettier@3.8.1...3.8.2)

##### Angular: Support Angular v21.2 ([#&#8203;18722](prettier/prettier#18722), [#&#8203;19034](prettier/prettier#19034) by [@&#8203;fisker](https://github.com/fisker))

Exhaustive typechecking with `@default never;`

<!-- prettier-ignore -->

```html
<!-- Input -->
@&#8203;switch (foo) {
  @&#8203;case (1) {}
  @&#8203;default never;
}

<!-- Prettier 3.8.1 -->
SyntaxError: Incomplete block "default never". If you meant to write the @&#8203; character, you should use the "&#&#8203;64;" HTML entity instead. (3:3)

<!-- Prettier 3.8.2 -->
@&#8203;switch (foo) {
  @&#8203;case (1) {}
  @&#8203;default never;
}
```

`arrow function` and `instanceof` expressions.

<!-- prettier-ignore -->

```html
<!-- Input -->
@&#8203;let fn = (a) =>        a?    1:2;

{{ fn ( a         instanceof b)}}

<!-- Prettier 3.8.1 -->
@&#8203;let fn = (a) =>        a?    1:2;

{{ fn ( a         instanceof b)}}

<!-- Prettier 3.8.2 -->
@&#8203;let fn = (a) => (a ? 1 : 2);

{{ fn(a instanceof b) }}
```

</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 [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My4xMTAuMTQiLCJ1cGRhdGVkSW5WZXIiOiI0My4xMTAuMTQiLCJ0YXJnZXRCcmFuY2giOiJtYWluIiwibGFiZWxzIjpbXX0=-->
sys-support pushed a commit to 3caravelle/renovate that referenced this pull request Apr 10, 2026
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)) | [`3.8.1` → `3.8.2`](https://renovatebot.com/diffs/npm/prettier/3.8.1/3.8.2) | ![age](https://developer.mend.io/api/mc/badges/age/npm/prettier/3.8.2?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/prettier/3.8.1/3.8.2?slim=true) |

---

### Release Notes

<details>
<summary>prettier/prettier (prettier)</summary>

### [`v3.8.2`](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#382)

[Compare Source](prettier/prettier@3.8.1...3.8.2)

[diff](prettier/prettier@3.8.1...3.8.2)

##### Angular: Support Angular v21.2 ([#&#8203;18722](prettier/prettier#18722), [#&#8203;19034](prettier/prettier#19034) by [@&#8203;fisker](https://github.com/fisker))

Exhaustive typechecking with `@default never;`

<!-- prettier-ignore -->

```html
<!-- Input -->
@&#8203;switch (foo) {
  @&#8203;case (1) {}
  @&#8203;default never;
}

<!-- Prettier 3.8.1 -->
SyntaxError: Incomplete block "default never". If you meant to write the @&#8203; character, you should use the "&#&#8203;64;" HTML entity instead. (3:3)

<!-- Prettier 3.8.2 -->
@&#8203;switch (foo) {
  @&#8203;case (1) {}
  @&#8203;default never;
}
```

`arrow function` and `instanceof` expressions.

<!-- prettier-ignore -->

```html
<!-- Input -->
@&#8203;let fn = (a) =>        a?    1:2;

{{ fn ( a         instanceof b)}}

<!-- Prettier 3.8.1 -->
@&#8203;let fn = (a) =>        a?    1:2;

{{ fn ( a         instanceof b)}}

<!-- Prettier 3.8.2 -->
@&#8203;let fn = (a) => (a ? 1 : 2);

{{ fn(a instanceof b) }}
```

</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/26
Co-authored-by: Renovate Bot <[email protected]>
Co-committed-by: Renovate Bot <[email protected]>
robbevp pushed a commit to robbevp/website-robbevanpetegem that referenced this pull request Apr 18, 2026
This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [eslint](https://eslint.org) ([source](https://github.com/eslint/eslint)) | devDependencies | patch | [`9.39.3` -> `9.39.4`](https://renovatebot.com/diffs/npm/eslint/9.39.3/9.39.4) |
| [prettier](https://prettier.io) ([source](https://github.com/prettier/prettier)) | devDependencies | patch | [`3.8.1` -> `3.8.3`](https://renovatebot.com/diffs/npm/prettier/3.8.1/3.8.3) |
| [stylelint](https://stylelint.io) ([source](https://github.com/stylelint/stylelint)) | devDependencies | minor | [`17.4.0` -> `17.8.0`](https://renovatebot.com/diffs/npm/stylelint/17.4.0/17.8.0) |

---

### Release Notes

<details>
<summary>eslint/eslint (eslint)</summary>

### [`v9.39.4`](https://github.com/eslint/eslint/releases/tag/v9.39.4)

[Compare Source](eslint/eslint@v9.39.3...v9.39.4)

#### Bug Fixes

- [`f18f6c8`](eslint/eslint@f18f6c8) fix: update dependency minimatch to ^3.1.5 ([#&#8203;20564](eslint/eslint#20564)) (Milos Djermanovic)
- [`a3c868f`](eslint/eslint@a3c868f) fix: update dependency [@&#8203;eslint/eslintrc](https://github.com/eslint/eslintrc) to ^3.3.4 ([#&#8203;20554](eslint/eslint#20554)) (Milos Djermanovic)
- [`234d005`](eslint/eslint@234d005) fix: minimatch security vulnerability patch for v9.x ([#&#8203;20549](eslint/eslint#20549)) (Andrej Beles)
- [`b1b37ee`](eslint/eslint@b1b37ee) fix: update `ajv` to `6.14.0` to address security vulnerabilities ([#&#8203;20538](eslint/eslint#20538)) (루밀LuMir)

#### Documentation

- [`4675152`](eslint/eslint@4675152) docs: add deprecation notice partial ([#&#8203;20520](eslint/eslint#20520)) (Milos Djermanovic)

#### Chores

- [`b8b4eb1`](eslint/eslint@b8b4eb1) chore: update dependencies for ESLint v9.39.4 ([#&#8203;20596](eslint/eslint#20596)) (Francesco Trotta)
- [`71b2f6b`](eslint/eslint@71b2f6b) chore: package.json update for [@&#8203;eslint/js](https://github.com/eslint/js) release (Jenkins)
- [`1d16c2f`](eslint/eslint@1d16c2f) ci: pin Node.js 25.6.1 ([#&#8203;20563](eslint/eslint#20563)) (Milos Djermanovic)

</details>

<details>
<summary>prettier/prettier (prettier)</summary>

### [`v3.8.3`](https://github.com/prettier/prettier/blob/HEAD/CHANGELOG.md#383)

[Compare Source](prettier/prettier@3.8.2...3.8.3)

[diff](prettier/prettier@3.8.2...3.8.3)

##### SCSS: Prevent trailing comma in `if()` function ([#&#8203;18471](prettier/prettier#18471) by [@&#8203;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)

[Compare Source](prettier/prettier@3.8.1...3.8.2)

[diff](prettier/prettier@3.8.1...3.8.2)

##### Angular: Support Angular v21.2 ([#&#8203;18722](prettier/prettier#18722), [#&#8203;19034](prettier/prettier#19034) by [@&#8203;fisker](https://github.com/fisker))

Exhaustive typechecking with `@default never;`

<!-- prettier-ignore -->

```html
<!-- Input -->
@&#8203;switch (foo) {
  @&#8203;case (1) {}
  @&#8203;default never;
}

<!-- Prettier 3.8.1 -->
SyntaxError: Incomplete block "default never". If you meant to write the @&#8203; character, you should use the "&#&#8203;64;" HTML entity instead. (3:3)

<!-- Prettier 3.8.2 -->
@&#8203;switch (foo) {
  @&#8203;case (1) {}
  @&#8203;default never;
}
```

`arrow function` and `instanceof` expressions.

<!-- prettier-ignore -->

```html
<!-- Input -->
@&#8203;let fn = (a) =>        a?    1:2;

{{ fn ( a         instanceof b)}}

<!-- Prettier 3.8.1 -->
@&#8203;let fn = (a) =>        a?    1:2;

{{ fn ( a         instanceof b)}}

<!-- Prettier 3.8.2 -->
@&#8203;let fn = (a) => (a ? 1 : 2);

{{ fn(a instanceof b) }}
```

</details>

<details>
<summary>stylelint/stylelint (stylelint)</summary>

### [`v17.8.0`](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#1780---2026-04-15)

[Compare Source](stylelint/stylelint@17.7.0...17.8.0)

It adds 3 new rules and 1 configuration property.

- Added: `languageOptions.directionality` configuration property ([#&#8203;8687](stylelint/stylelint#8687)) ([@&#8203;sw1tch3roo](https://github.com/sw1tch3roo)).
- Added: `property-layout-mappings` rule ([#&#8203;8687](stylelint/stylelint#8687)) ([@&#8203;sw1tch3roo](https://github.com/sw1tch3roo)).
- Added: `relative-selector-nesting-notation` rule ([#&#8203;8730](stylelint/stylelint#8730)) ([@&#8203;sw1tch3roo](https://github.com/sw1tch3roo)).
- Added: `selector-no-deprecated` rule ([#&#8203;8694](stylelint/stylelint#8694)) ([@&#8203;immitsu](https://github.com/immitsu)).

### [`v17.7.0`](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#1770---2026-04-12)

[Compare Source](stylelint/stylelint@17.6.0...17.7.0)

It fixes 4 bugs, including clearer problem messages by removing filler words and leading with the problem. We've also released `1.0.0` of [create-stylelint](https://github.com/stylelint/create-stylelint) to help with first-time Stylelint setup.

- Fixed: clarity of problem messages ([#&#8203;9199](stylelint/stylelint#9199)) ([@&#8203;jeddy3](https://github.com/jeddy3)).
- Fixed: `--print-config` CLI flag to hide internal properties ([#&#8203;9194](stylelint/stylelint#9194)) ([@&#8203;ybiquitous](https://github.com/ybiquitous)).
- Fixed: `function-url-quotes` false positives when URLs have modifiers ([#&#8203;8702](stylelint/stylelint#8702)) ([@&#8203;immitsu](https://github.com/immitsu)).
- Fixed: `selector-no-qualifying-type` false positives for `:has()` ([#&#8203;9182](stylelint/stylelint#9182)) ([@&#8203;romainmenke](https://github.com/romainmenke)).

### [`v17.6.0`](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#1760---2026-03-26)

[Compare Source](stylelint/stylelint@17.5.0...17.6.0)

It adds support for extending units in `languageOptions`, which then apply to rules like `declaration-property-value-no-unknown`, and fixes 2 bugs.

- Added: support for extending units to `languageOptions` ([#&#8203;9166](stylelint/stylelint#9166)) ([@&#8203;jeddy3](https://github.com/jeddy3)).
- Fixed: missing `ruleMetadata` when linting multiple files with overrides ([#&#8203;9154](stylelint/stylelint#9154)) ([@&#8203;kovsu](https://github.com/kovsu)).
- Fixed: `custom-property-no-missing-var-function` false positives for `timeline-scope` and `animation-timeline` ([#&#8203;9164](stylelint/stylelint#9164)) ([@&#8203;splincode](https://github.com/splincode)).

### [`v17.5.0`](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#1750---2026-03-19)

[Compare Source](stylelint/stylelint@17.4.0...17.5.0)

It deprecates two rule options, adds 1 rule option and fixes 7 bugs. We've also released [`2.1.0`](https://github.com/stylelint/vscode-stylelint/releases/tag/2.1.0) of [our VS Code extension](https://marketplace.visualstudio.com/items?itemName=stylelint.vscode-stylelint), which adds 8 new requested features, and our [first release](https://www.npmjs.com/package/@&#8203;stylelint/language-server) of the Stylelint Language Server.

- Deprecated: `*syntax` options from `declaration-property-value-no-unknown` ([#&#8203;9102](stylelint/stylelint#9102)) ([@&#8203;ragini-pandey](https://github.com/ragini-pandey)).
- Added: `ignoreMediaFeatureNameValues: {}` to `media-feature-name-value-no-unknown` ([#&#8203;8976](stylelint/stylelint#8976)) ([@&#8203;kovsu](https://github.com/kovsu)).
- Fixed: `node_modules` not ignored when using `codeFilename` in Node.js API ([#&#8203;9130](stylelint/stylelint#9130)) ([@&#8203;adalinesimonian](https://github.com/adalinesimonian)).
- Fixed: `Error TS7016` for imported `css-tree` types ([#&#8203;9133](stylelint/stylelint#9133)) ([@&#8203;ragini-pandey](https://github.com/ragini-pandey)).
- Fixed: `declaration-property-value-keyword-no-deprecated` false positives for function arguments ([#&#8203;9116](stylelint/stylelint#9116)) ([@&#8203;ragini-pandey](https://github.com/ragini-pandey)).
- Fixed: `declaration-property-value-no-unknown` false positives for `calc-size()` containing `size` keyword ([#&#8203;9105](stylelint/stylelint#9105)) ([@&#8203;hriztam](https://github.com/hriztam)).
- Fixed: `no-descending-specificity` & `no-duplicate-selectors` false negatives for equivalent compound selectors ([#&#8203;8977](stylelint/stylelint#8977)) ([@&#8203;kovsu](https://github.com/kovsu)).
- Fixed: `no-invalid-position-declaration` false positives for `@mixin` and `@scope` ([#&#8203;9120](stylelint/stylelint#9120)) ([@&#8203;ragini-pandey](https://github.com/ragini-pandey)).
- Fixed: `property-no-unknown` false negatives for `types` ([#&#8203;9117](stylelint/stylelint#9117)) ([@&#8203;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.

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 - [ ] <!-- 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/508
Co-authored-by: Renovate Bot <[email protected]>
Co-committed-by: Renovate Bot <[email protected]>
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Add support for angular @switch exhaustive type check case "@default never;"

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