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fix(format/html): preserve block indentation if already present in some cases#9757

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dyc3/html-fmt-preserve-whitespace
Apr 23, 2026
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fix(format/html): preserve block indentation if already present in some cases#9757
dyc3 merged 2 commits into
mainfrom
dyc3/html-fmt-preserve-whitespace

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@dyc3

@dyc3 dyc3 commented Mar 31, 2026

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Summary

The change is pretty small, but the logic is pretty complex. However, this does result in a small improvement to our prettier snapshots.

generated by opus 4.6. with very heavy guidance

fixes #9099
fixes #9450

Test Plan

snapshots

Docs

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changeset-bot Bot commented Mar 31, 2026

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🦋 Changeset detected

Latest commit: f71753e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 13 packages
Name Type
@biomejs/biome Patch
@biomejs/cli-win32-x64 Patch
@biomejs/cli-win32-arm64 Patch
@biomejs/cli-darwin-x64 Patch
@biomejs/cli-darwin-arm64 Patch
@biomejs/cli-linux-x64 Patch
@biomejs/cli-linux-arm64 Patch
@biomejs/cli-linux-x64-musl Patch
@biomejs/cli-linux-arm64-musl Patch
@biomejs/wasm-web Patch
@biomejs/wasm-bundler Patch
@biomejs/wasm-nodejs Patch
@biomejs/backend-jsonrpc Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

@github-actions github-actions Bot added A-Formatter Area: formatter L-HTML Language: HTML and super languages labels Mar 31, 2026
@dyc3 dyc3 requested review from a team March 31, 2026 21:58
@codspeed-hq

codspeed-hq Bot commented Mar 31, 2026

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Merging this PR will not alter performance

✅ 67 untouched benchmarks
⏩ 189 skipped benchmarks1


Comparing dyc3/html-fmt-preserve-whitespace (f71753e) with main (467fd87)

Open in CodSpeed

Footnotes

  1. 189 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports.

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Walkthrough

Adjusts the HTML formatter to better preserve original newlines for non-text children. ChildrenMeta now records presence of non-text children and word text; forcing multiline after a leading newline now occurs when there are block elements or when children are exclusively non-text (non-text present and no word text). Template-specific logic requires a leading newline plus non-text children to force multiline. Opening-element formatting now formats dangling comments based on whether the original closing delimiter had surrounding newlines. Adds changeset entries and new tests (Svelte, HTML, Vue) and updates the test harness.

Suggested reviewers

  • ematipico
🚥 Pre-merge checks | ✅ 4
✅ Passed checks (4 passed)
Check name Status Explanation
Title check ✅ Passed The title clearly describes the primary change: preserving block indentation in the HTML formatter when it's already present in certain cases.
Linked Issues check ✅ Passed The PR addresses both linked issues: it preserves multiline formatting for non-text children (expressions, comments) in #9099 and prevents unnecessary line breaks when formatting with experimentalFullSupportEnabled in #9450.
Out of Scope Changes check ✅ Passed All changes are scoped to HTML formatter logic, test fixtures, and configuration—directly addressing the issues. The quick_test.rs modification (clearing input to empty string) appears to be a test setup change aligned with testing the formatter fixes.
Description check ✅ Passed The PR description directly addresses the changeset, explaining the motivation for fixing HTML formatter indentation preservation and linking to specific issues (#9099, #9450).

✏️ Tip: You can configure your own custom pre-merge checks in the settings.

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  • Commit unit tests in branch dyc3/html-fmt-preserve-whitespace

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Actionable comments posted: 2

🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@crates/biome_html_formatter/src/html/lists/element_list.rs`:
- Around line 316-320: The two boolean flags has_non_text_child and has_word
should treat HtmlChild::Comment as non-text, so update the child-iteration logic
that sets has_non_text_child/has_word (the code that matches HtmlChild variants)
to mark Comment as non-text (i.e., set has_non_text_child = true) and ensure
comments do not set has_word; also apply the same change in the other similar
match sites that update these flags (the other occurrences that set
has_non_text_child/has_word), and add a new comment-only fixture (e.g., an
element containing only a comment between outer newlines) to cover this case so
the multiline rule is exercised.
- Around line 343-345: The current handling of HtmlChild::Verbatim always marks
meta.has_non_text_child = true and increments block_element_count, which
misclassifies ignored inline children as block-level; update the
HtmlChild::Verbatim branch to inspect the underlying element's display using
get_element_css_display(element) (or otherwise detect inline vs block) and only
set meta.has_non_text_child and increment block_element_count when the verbatim
child is actually block-level, otherwise treat it as inline (i.e., do not bump
block_element_count or mark multiple_block_elements); reference
HtmlChild::Verbatim, get_element_css_display, meta.has_non_text_child,
block_element_count, and the multiple_block_elements decision in your change.
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⛔ Files ignored due to path filters (5)
  • crates/biome_html_formatter/tests/specs/html/interpolation/interpolation.html.snap is excluded by !**/*.snap and included by **
  • crates/biome_html_formatter/tests/specs/html/svelte/html.svelte.snap is excluded by !**/*.snap and included by **
  • crates/biome_html_formatter/tests/specs/html/svelte/preserve_newline_nontext_children.svelte.snap is excluded by !**/*.snap and included by **
  • crates/biome_html_formatter/tests/specs/html/whitespace/preserve-newline-nontext-children.html.snap is excluded by !**/*.snap and included by **
  • crates/biome_html_formatter/tests/specs/prettier/vue/html-vue/hello-world.html.snap is excluded by !**/*.snap and included by **
📒 Files selected for processing (4)
  • .changeset/purple-grapes-leave.md
  • crates/biome_html_formatter/src/html/lists/element_list.rs
  • crates/biome_html_formatter/tests/specs/html/svelte/preserve_newline_nontext_children.svelte
  • crates/biome_html_formatter/tests/specs/html/whitespace/preserve-newline-nontext-children.html

Comment thread crates/biome_html_formatter/src/html/lists/element_list.rs
Comment thread crates/biome_html_formatter/src/html/lists/element_list.rs
@dyc3 dyc3 force-pushed the dyc3/html-fmt-preserve-whitespace branch from a9c53f2 to a5834b8 Compare April 1, 2026 00:58

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Actionable comments posted: 1

♻️ Duplicate comments (1)
crates/biome_html_formatter/src/html/lists/element_list.rs (1)

343-345: ⚠️ Potential issue | 🟠 Major

Verbatim still pretends to be block-level.

HtmlChild::Verbatim now correctly counts as non-text, but it still bumps block_element_count for every skipped node and never sets has_block_element. That means two ignored inline children can spuriously trigger multiple_block_elements, while a single ignored block child misses the block-element path entirely. Please classify the verbatim child via get_element_css_display(element) before setting the block-related flags, and add a snapshot for adjacent ignored inline children.

Possible fix
-                HtmlChild::Verbatim(_) => {
-                    meta.has_non_text_child = true;
-                    block_element_count += 1;
+                HtmlChild::Verbatim(element) => {
+                    meta.has_non_text_child = true;
+                    let display = get_element_css_display(element);
+                    if display.is_block_like() {
+                        meta.has_block_element = true;
+                        block_element_count += 1;
+                    }
                 }
As per coding guidelines, "All code changes MUST include appropriate tests: ... and bug fixes require tests that reproduce and validate the fix."
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.

In `@crates/biome_html_formatter/src/html/lists/element_list.rs` around lines 343
- 345, HtmlChild::Verbatim is currently treated as a block by unconditionally
setting meta.has_non_text_child and incrementing block_element_count; change the
logic in the Verbatim arm to first call get_element_css_display(element) and
then set meta.has_non_text_child and either increment block_element_count and
set meta.has_block_element for block displays or only mark non-text for inline
displays so ignored inline neighbors don't spuriously trigger
multiple_block_elements; update the test suite by adding a snapshot test that
renders two adjacent ignored inline verbatim children to assert the inline path
(no multiple_block_elements) and one test with a single block-level verbatim
child to confirm the block-element path.
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@crates/biome_html_formatter/src/html/auxiliary/opening_element.rs`:
- Around line 63-67: The current has_source_newline detection uses
tok.has_leading_whitespace_or_newline(), which treats a single space before a
closing tag as a newline and misclassifies inline cases; update the check in
opening_element.rs (the has_source_newline binding that chains
node.parent::<HtmlElement>() -> closing_element() -> l_angle_token()) to detect
newline-only leading trivia (e.g., inspect the token's leading trivia/text for
'\n' or use a has_leading_newline() helper if available) instead of
has_leading_whitespace_or_newline(), and add a regression test fixture that
covers the inline-space case like "<div><!-- comment --> </div>" to ensure it
remains inline.

---

Duplicate comments:
In `@crates/biome_html_formatter/src/html/lists/element_list.rs`:
- Around line 343-345: HtmlChild::Verbatim is currently treated as a block by
unconditionally setting meta.has_non_text_child and incrementing
block_element_count; change the logic in the Verbatim arm to first call
get_element_css_display(element) and then set meta.has_non_text_child and either
increment block_element_count and set meta.has_block_element for block displays
or only mark non-text for inline displays so ignored inline neighbors don't
spuriously trigger multiple_block_elements; update the test suite by adding a
snapshot test that renders two adjacent ignored inline verbatim children to
assert the inline path (no multiple_block_elements) and one test with a single
block-level verbatim child to confirm the block-element path.
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  • Push a commit to this branch (recommended)
  • Create a new PR with the fixes

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⛔ Files ignored due to path filters (5)
  • crates/biome_html_formatter/tests/specs/html/interpolation/interpolation.html.snap is excluded by !**/*.snap and included by **
  • crates/biome_html_formatter/tests/specs/html/svelte/html.svelte.snap is excluded by !**/*.snap and included by **
  • crates/biome_html_formatter/tests/specs/html/svelte/preserve_newline_nontext_children.svelte.snap is excluded by !**/*.snap and included by **
  • crates/biome_html_formatter/tests/specs/html/whitespace/preserve-newline-nontext-children.html.snap is excluded by !**/*.snap and included by **
  • crates/biome_html_formatter/tests/specs/prettier/vue/html-vue/hello-world.html.snap is excluded by !**/*.snap and included by **
📒 Files selected for processing (5)
  • .changeset/purple-grapes-leave.md
  • crates/biome_html_formatter/src/html/auxiliary/opening_element.rs
  • crates/biome_html_formatter/src/html/lists/element_list.rs
  • crates/biome_html_formatter/tests/specs/html/svelte/preserve_newline_nontext_children.svelte
  • crates/biome_html_formatter/tests/specs/html/whitespace/preserve-newline-nontext-children.html
✅ Files skipped from review due to trivial changes (2)
  • .changeset/purple-grapes-leave.md
  • crates/biome_html_formatter/tests/specs/html/svelte/preserve_newline_nontext_children.svelte

Comment thread crates/biome_html_formatter/src/html/auxiliary/opening_element.rs
@dyc3 dyc3 marked this pull request as draft April 3, 2026 13:40
@dyc3 dyc3 force-pushed the dyc3/html-fmt-preserve-whitespace branch 2 times, most recently from 7c6ba3e to b50595d Compare April 3, 2026 14:42
@dyc3 dyc3 marked this pull request as ready for review April 3, 2026 14:42

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Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@crates/biome_html_formatter/src/html/auxiliary/element.rs`:
- Around line 190-200: The helper name has_non_text_child in element.rs is
misleading because it only detects element nodes
(HtmlElement/HtmlSelfClosingElement) while other places
(ChildrenMeta.has_non_text_child in element_list.rs) treat comments as non-text;
rename has_non_text_child to has_element_child (or similar) to reflect its
actual behavior, update its definition and all call sites (e.g., the call in the
forces_break_children expression) and adjust the inline comment to say "direct
element children" to avoid confusion; ensure any documentation or tests
referencing the old name are updated accordingly.
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Fix all unresolved CodeRabbit comments on this PR:

  • Push a commit to this branch (recommended)
  • Create a new PR with the fixes

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⛔ Files ignored due to path filters (6)
  • crates/biome_html_formatter/tests/specs/html/interpolation/interpolation.html.snap is excluded by !**/*.snap and included by **
  • crates/biome_html_formatter/tests/specs/html/svelte/html.svelte.snap is excluded by !**/*.snap and included by **
  • crates/biome_html_formatter/tests/specs/html/svelte/preserve_newline_nontext_children.svelte.snap is excluded by !**/*.snap and included by **
  • crates/biome_html_formatter/tests/specs/html/vue/inner-template.vue.snap is excluded by !**/*.snap and included by **
  • crates/biome_html_formatter/tests/specs/html/whitespace/preserve-newline-nontext-children.html.snap is excluded by !**/*.snap and included by **
  • crates/biome_html_formatter/tests/specs/prettier/vue/html-vue/hello-world.html.snap is excluded by !**/*.snap and included by **
📒 Files selected for processing (9)
  • .changeset/purple-grapes-leave.md
  • .changeset/warm-roses-dream.md
  • crates/biome_html_formatter/src/html/auxiliary/element.rs
  • crates/biome_html_formatter/src/html/auxiliary/opening_element.rs
  • crates/biome_html_formatter/src/html/lists/element_list.rs
  • crates/biome_html_formatter/tests/quick_test.rs
  • crates/biome_html_formatter/tests/specs/html/svelte/preserve_newline_nontext_children.svelte
  • crates/biome_html_formatter/tests/specs/html/vue/inner-template.vue
  • crates/biome_html_formatter/tests/specs/html/whitespace/preserve-newline-nontext-children.html
✅ Files skipped from review due to trivial changes (4)
  • .changeset/warm-roses-dream.md
  • crates/biome_html_formatter/tests/specs/html/vue/inner-template.vue
  • .changeset/purple-grapes-leave.md
  • crates/biome_html_formatter/tests/specs/html/svelte/preserve_newline_nontext_children.svelte
🚧 Files skipped from review as they are similar to previous changes (1)
  • crates/biome_html_formatter/src/html/lists/element_list.rs

Comment thread crates/biome_html_formatter/src/html/auxiliary/element.rs

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♻️ Duplicate comments (1)
crates/biome_html_formatter/src/html/auxiliary/opening_element.rs (1)

65-69: ⚠️ Potential issue | 🟡 Minor

Whitespace isn't newline.

has_leading_whitespace_or_newline() also matches a plain space before </div>, so an inline case like <div><!-- comment --> </div> will be treated as block-style and reflowed onto multiple lines. This needs a newline-only check.

Consider inspecting the token's leading trivia for \n directly, or using a dedicated has_leading_newline() helper if available in the codebase.

#!/bin/bash
# Check if there's a has_leading_newline helper or similar method available
rg -n "has_leading_newline|leading_trivia.*newline" --type rust -C2
#!/bin/bash
# Check what methods are available on HtmlSyntaxToken for trivia inspection
ast-grep --pattern $'impl $_ for HtmlSyntaxToken {
  $$$
}'
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.

In `@crates/biome_html_formatter/src/html/auxiliary/opening_element.rs` around
lines 65 - 69, The current has_source_newline check uses
tok.has_leading_whitespace_or_newline(), which treats a plain space as a
newline; replace it with a newline-only check: inspect the HtmlSyntaxToken's
leading trivia for a '\n' (or call an existing has_leading_newline() helper)
instead of has_leading_whitespace_or_newline() so that has_source_newline only
returns true when the token before the closing element actually contains a
newline; update the chain around node.parent::<HtmlElement>().and_then(|el|
el.closing_element().ok()).and_then(|c| c.l_angle_token().ok()) to call the
newline-specific inspection on the token.
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.

Duplicate comments:
In `@crates/biome_html_formatter/src/html/auxiliary/opening_element.rs`:
- Around line 65-69: The current has_source_newline check uses
tok.has_leading_whitespace_or_newline(), which treats a plain space as a
newline; replace it with a newline-only check: inspect the HtmlSyntaxToken's
leading trivia for a '\n' (or call an existing has_leading_newline() helper)
instead of has_leading_whitespace_or_newline() so that has_source_newline only
returns true when the token before the closing element actually contains a
newline; update the chain around node.parent::<HtmlElement>().and_then(|el|
el.closing_element().ok()).and_then(|c| c.l_angle_token().ok()) to call the
newline-specific inspection on the token.

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Comment thread crates/biome_html_formatter/src/html/auxiliary/element.rs Outdated
Comment thread crates/biome_html_formatter/src/html/lists/element_list.rs
Comment thread crates/biome_html_formatter/tests/quick_test.rs
@dyc3 dyc3 force-pushed the dyc3/html-fmt-preserve-whitespace branch from 64bdd39 to c263062 Compare April 3, 2026 18:51
@dyc3 dyc3 requested a review from ematipico April 3, 2026 20:47

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Seems ok, however there are a couple of comments from coderabbit that might need some attention

@dyc3 dyc3 merged commit 2c62594 into main Apr 23, 2026
17 checks passed
@dyc3 dyc3 deleted the dyc3/html-fmt-preserve-whitespace branch April 23, 2026 16:40
@github-actions github-actions Bot mentioned this pull request Apr 23, 2026
OIRNOIR pushed a commit to OIRNOIR/YouTube-Helper-Client that referenced this pull request May 4, 2026
This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [@biomejs/biome](https://biomejs.dev) ([source](https://github.com/biomejs/biome/tree/HEAD/packages/@biomejs/biome)) | imports | patch | [`2.4.13` -> `2.4.14`](https://renovatebot.com/diffs/npm/@biomejs%2fbiome/2.4.13/2.4.14) |

---

### Release Notes

<details>
<summary>biomejs/biome (@&#8203;biomejs/biome)</summary>

### [`v2.4.14`](https://github.com/biomejs/biome/blob/HEAD/packages/@&#8203;biomejs/biome/CHANGELOG.md#2414)

[Compare Source](https://github.com/biomejs/biome/compare/@biomejs/biome@2.4.13...@biomejs/biome@2.4.14)

##### Patch Changes

- [#&#8203;9393](biomejs/biome#9393) [`491b171`](biomejs/biome@491b171) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Added the nursery rule [`useTestHooksOnTop`](https://biomejs.dev/linter/rules/use-test-hooks-on-top) in the `test` domain. The rule flags lifecycle hooks (`beforeEach`, `beforeAll`, `afterEach`, `afterAll`) that appear after test cases in the same block, enforcing that hooks are defined before any test case.

- [#&#8203;10157](biomejs/biome#10157) [`eefc5ab`](biomejs/biome@eefc5ab) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Fixed [#&#8203;7882](biomejs/biome#7882): The HTML parser will now emit better diagnostics when it encounters a void element with a closing tag, such as `<br></br>`. Previously, the parser would emit multiple diagnostics with conflicting advice. Now it emits a single diagnostic that clearly states that void elements should not have closing tags.

- [#&#8203;10054](biomejs/biome#10054) [`0e9f569`](biomejs/biome@0e9f569) Thanks [@&#8203;minseong0324](https://github.com/minseong0324)! - [`noMisleadingReturnType`](https://biomejs.dev/linter/rules/no-misleading-return-type/) no longer misses widening from concrete object types, class instances, object literals, tuples, functions, and regular expressions to `: object`.

  A function annotated `: object` returning an object literal:

  ```ts
  function f(): object {
    return { retry: true };
  }
  ```

- [#&#8203;10116](biomejs/biome#10116) [`53269eb`](biomejs/biome@53269eb) Thanks [@&#8203;jiwon79](https://github.com/jiwon79)! - Fixed [#&#8203;6201](biomejs/biome#6201): [`noUselessEscapeInRegex`](https://biomejs.dev/linter/rules/no-useless-escape-in-regex/) no longer flags an escaped backslash followed by `-` as a useless escape. Patterns like `/[\\-]/` are now considered valid because the second `\` is the escaped backslash, not an unnecessary escape of the trailing dash.

- [#&#8203;10092](biomejs/biome#10092) [`33d8543`](biomejs/biome@33d8543) Thanks [@&#8203;Conaclos](https://github.com/Conaclos)! - Fixed [#&#8203;9097](biomejs/biome#9097): [`organizeImports`](https://biomejs.dev/assist/actions/organize-imports/) no longer adds a blank line between a never-matched group and a matched group.

  Given the following `organizeImports` options:

  ```json
  {
    "groups": [":NODE:", ":BLANK_LINE:", ":PACKAGE:", ":BLANK_LINE:", ":PATH:"]
  }
  ```

  The following code...

  ```js
  // Comment
  import "package";
  import "./file.js";
  ```

  ...was organized as:

  ```diff
  +
    // Comment
    import "package";
  +
    import "./file.js";
  ```

  A blank line was added even though the group ':NODE:' doesn't match any imports here.
  `:BLANK_LINE:` between never-matched groups and matched groups are now ignored.
  The code is now organized as:

  ```diff
    // Comment
    import "package";
  +
    import "./file.js";
  ```

- [#&#8203;10138](biomejs/biome#10138) [`a10b6c1`](biomejs/biome@a10b6c1) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Fixed Vue `v-for` handling for [`noUndeclaredVariables`](https://biomejs.dev/linter/rules/no-undeclared-variables/) and [`noUnusedVariables`](https://biomejs.dev/linter/rules/no-unused-variables/). Biome now recognizes variables declared by `v-for` directives and references to iterated values in Vue templates.

- [#&#8203;10115](biomejs/biome#10115) [`d428d76`](biomejs/biome@d428d76) Thanks [@&#8203;minseong0324](https://github.com/minseong0324)! - [`noMisleadingReturnType`](https://biomejs.dev/linter/rules/no-misleading-return-type/) no longer reports false positives when a union return type's `boolean` variant is covered by both `true` and `false` returns.

- [#&#8203;9922](biomejs/biome#9922) [`7acf1e0`](biomejs/biome@7acf1e0) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Added the new nursery rule [`noReactStringRefs`](https://biomejs.dev/linter/rules/no-react-string-refs/), which disallows legacy React string refs such as `ref="hello"` and `this.refs.hello`.

  Biome also reports template-literal refs such as ``ref={`hello`}``, so React code can consistently migrate to callback refs, `createRef()`, or `useRef()`.

- [#&#8203;10010](biomejs/biome#10010) [`f3e76ab`](biomejs/biome@f3e76ab) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Fixed a bug in the LSP file watcher registration so Biome now watches `.biome.json` and `.biome.jsonc` configuration files and reloads workspace settings when they change.

- [#&#8203;10176](biomejs/biome#10176) [`8a40ef8`](biomejs/biome@8a40ef8) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Fixed [#&#8203;10011](biomejs/biome#10011): The [`noThisInStatic`](https://biomejs.dev/linter/rules/no-this-in-static/) rule no longer reports `this` when it is used as the constructor target in `new this(...)`, which is required for inherited static factory methods.

- [#&#8203;10163](biomejs/biome#10163) [`6867e96`](biomejs/biome@6867e96) Thanks [@&#8203;jiwon79](https://github.com/jiwon79)! - Fixed [#&#8203;9884](biomejs/biome#9884): The [`useSortedAttributes`](https://biomejs.dev/assist/actions/use-sorted-attributes/) auto-fix no longer corrupts source code when both an outer JSX element and a nested JSX-valued attribute have unsorted attributes in the same pass. Multiple unsorted groups separated by spread or shorthand attributes within the same JSX element are now reported as a single diagnostic.

- [#&#8203;10079](biomejs/biome#10079) [`d29dd19`](biomejs/biome@d29dd19) Thanks [@&#8203;Damix48](https://github.com/Damix48)! - Fixed false positive in `noAssignInExpressions` for Svelte `{@&#8203;const}` blocks. Assignments in `{@&#8203;const name = value}` are now correctly recognized as declarations rather than accidental assignments in expressions.

- [#&#8203;10080](biomejs/biome#10080) [`5d8fdac`](biomejs/biome@5d8fdac) Thanks [@&#8203;Damix48](https://github.com/Damix48)! - Fixed parsing of closing parentheses in Svelte `{#each}` block key expressions. Biome now correctly parses method calls and other parenthesised expressions used as keys.

  For example, the following snippets are now parsed correctly:

  ```svelte
  {#each numbers as number, index (number.toString())}
    <p>{number}</p>
  {/each}

  {#each numbers as number (key(number))}
    <p>{number}</p>
  {/each}
  ```

- [#&#8203;10140](biomejs/biome#10140) [`e7024b9`](biomejs/biome@e7024b9) Thanks [@&#8203;solithcy](https://github.com/solithcy)! - Fixed [#&#8203;10135](biomejs/biome#10135): Biome no longer crashes on missing Svelte template expressions.

  The following code snippet longer panics:

  ```svelte
  {#if }
   <p>^ this would previously crash</p>
  {/if}
  {@&#8203;const }
  <p>    ^ this would also crash</p>
  ```

- [#&#8203;10111](biomejs/biome#10111) [`7818009`](biomejs/biome@7818009) Thanks [@&#8203;jiwon79](https://github.com/jiwon79)! - Fixed [#&#8203;9997](biomejs/biome#9997): [`noDuplicateSelectors`](https://biomejs.dev/linter/rules/no-duplicate-selectors/) no longer reports false positives for selectors inside `@scope` queries. Biome now treats `@scope` as a separate at-rule context, like `@media`, `@supports`, `@container`, and `@starting-style`.

  The following snippet is no longer flagged as a duplicate:

  ```css
  .Example {
    padding: 0;
  }

  @&#8203;scope (.theme-dark) {
    .Example {
      color: white;
    }
  }
  ```

- [#&#8203;9926](biomejs/biome#9926) [`d62b331`](biomejs/biome@d62b331) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Added the nursery lint rule [`useMathMinMax`](https://biomejs.dev/linter/rules/use-math-min-max/), which prefers `Math.min()` and `Math.max()` over equivalent ternary comparisons.

  For example, this code:

  ```js
  const min = a < b ? a : b;
  ```

  is much more readable when rewritten as:

  ```js
  const min = Math.min(a, b);
  ```

- [#&#8203;10115](biomejs/biome#10115) [`d428d76`](biomejs/biome@d428d76) Thanks [@&#8203;minseong0324](https://github.com/minseong0324)! - [`useExhaustiveSwitchCases`](https://biomejs.dev/linter/rules/use-exhaustive-switch-cases/) now flags missing `true`/`false` cases for `boolean` discriminants, including when `boolean` is a union variant.

- [#&#8203;10125](biomejs/biome#10125) [`a55a0b6`](biomejs/biome@a55a0b6) Thanks [@&#8203;bmish](https://github.com/bmish)! - Fixed a resolver bug where packages that define a typed entry point through `package.json`'s `main` field but omit `types` were ignored during type-aware resolution. Type-aware rules such as [`noFloatingPromises`](https://biomejs.dev/linter/rules/no-floating-promises/) can now inspect imports from those packages.

- [#&#8203;10117](biomejs/biome#10117) [`895e809`](biomejs/biome@895e809) Thanks [@&#8203;denizdogan](https://github.com/denizdogan)! - Added support for the `corner-shape` family of CSS properties and the `superellipse()`/`squircle()` value functions, so [`noUnknownProperty`](https://biomejs.dev/linter/rules/no-unknown-property/) and [`noUnknownFunction`](https://biomejs.dev/linter/rules/no-unknown-function/) no longer flag them as unknown.

  New known properties: `corner-shape`, `corner-block-end-shape`, `corner-block-start-shape`, `corner-bottom-left-shape`, `corner-bottom-right-shape`, `corner-bottom-shape`, `corner-end-end-shape`, `corner-end-start-shape`, `corner-inline-end-shape`, `corner-inline-start-shape`, `corner-left-shape`, `corner-right-shape`, `corner-start-end-shape`, `corner-start-start-shape`, `corner-top-left-shape`, `corner-top-right-shape`, `corner-top-shape`.

  New known value functions: `superellipse()`, `squircle()`.

- [#&#8203;8620](biomejs/biome#8620) [`8df8f73`](biomejs/biome@8df8f73) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Fixed [#&#8203;8062](biomejs/biome#8062): Added support for parsing Vue `v-for` directives more accurately.

- [#&#8203;10191](biomejs/biome#10191) [`aa055cd`](biomejs/biome@aa055cd) Thanks [@&#8203;guney](https://github.com/guney)! - Now the rule [`noStaticElementInteractions`](https://biomejs.dev/linter/rules/no-static-element-interactions/) doesn't trigger custom elements.

- [#&#8203;9757](biomejs/biome#9757) [`2c62594`](biomejs/biome@2c62594) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Fixed [#&#8203;9099](biomejs/biome#9099): the HTML formatter collapsing non-text children (inline elements, Svelte expressions, comments) onto a single line when the source had them on separate lines. Biome now preserves the user's intended line breaks for exclusively non-text children.

  For example, the following Svelte snippet is now preserved instead of being collapsed to `<div>{name}<!-- comment --></div>`:

  ```svelte
  <div>
    {name}<!-- comment -->
  </div>
  ```

  Similarly, HTML elements like `<span>` inside a `<div>` are now preserved when written on their own line:

  ```html
  <div>
    <span>text</span>
  </div>
  ```

- [#&#8203;10105](biomejs/biome#10105) [`e7c1a6d`](biomejs/biome@e7c1a6d) Thanks [@&#8203;jiwon79](https://github.com/jiwon79)! - Fixed [#&#8203;10039](biomejs/biome#10039): [`useReadonlyClassProperties`](https://biomejs.dev/linter/rules/use-readonly-class-properties/) now detects unreassigned private members in class expressions and export default classes, not only in class declarations.

  The following patterns are now correctly flagged:

  ```ts
  const AnonClass = class {
    #prop = 123;
    constructor() {
      console.log(this.#prop);
    }
  };

  export default class {
    #prop = 123;
    constructor() {
      console.log(this.#prop);
    }
  }
  ```

- [#&#8203;10141](biomejs/biome#10141) [`46a77d0`](biomejs/biome@46a77d0) Thanks [@&#8203;minseong0324](https://github.com/minseong0324)! - Improved [`noUnnecessaryConditions`](https://biomejs.dev/linter/rules/no-unnecessary-conditions/) to detect conditions that are always truthy because they check built-in global class instances such as `Date`, `Map`, `Set`, `WeakMap`, and `Error`.

- [#&#8203;10178](biomejs/biome#10178) [`7b05a89`](biomejs/biome@7b05a89) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Fixed [#&#8203;10177](biomejs/biome#10177): The HTML parser no longer reports lowercase `html` or `doctype` text as invalid after void elements such as `<br>`.

- [#&#8203;10155](biomejs/biome#10155) [`0d4595d`](biomejs/biome@0d4595d) Thanks [@&#8203;jiwon79](https://github.com/jiwon79)! - Fixed [#&#8203;10045](biomejs/biome#10045): the CSS formatter no longer compounds indentation inside nested functional pseudo-classes such as `:not(:where(...))`, `:is(:where(...))`, and similar combinations. The same fix also removes one level of unnecessary indentation that was added inside any pseudo-class function whose argument list wrapped onto multiple lines, including `:nth-child(... of ...)`, `::part(...)`, and `:active-view-transition-type(...)`.
  The following snippet is now correctly formatted, matching Prettier.

  ```css
  input:not(
    :where(
      [type="submit"],
      [type="checkbox"],
      [type="radio"],
      [type="button"],
      [type="reset"]
    )
  ) {
    inline-size: 100%;
  }
  ```

- [#&#8203;10112](biomejs/biome#10112) [`6f0251e`](biomejs/biome@6f0251e) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Fixed [#&#8203;10110](biomejs/biome#10110): Biome's parser now accepts surrogate code points in JavaScript string `\u{...}` escapes.

- [#&#8203;10141](biomejs/biome#10141) [`46a77d0`](biomejs/biome@46a77d0) Thanks [@&#8203;minseong0324](https://github.com/minseong0324)! - Improved [`noMisleadingReturnType`](https://biomejs.dev/linter/rules/no-misleading-return-type/) to detect `object` return annotations that hide built-in global class instances such as `Date`, `Map`, `Set`, `WeakMap`, and `Error`.

- [#&#8203;10083](biomejs/biome#10083) [`4a664c1`](biomejs/biome@4a664c1) Thanks [@&#8203;ematipico](https://github.com/ematipico)! - Added two new options to [`noShadow`](https://biomejs.dev/linter/rules/no-shadow/), both defaulting to `true` to match typescript-eslint's behavior.

  Fixed [#&#8203;9482](biomejs/biome#9482): Added `ignoreFunctionTypeParameterNameValueShadow` option. When enabled, parameter names inside function type annotations (e.g. `(options: unknown) => void`) are not flagged as shadowing outer variables.

  Fixed [#&#8203;7812](biomejs/biome#7812): Added `ignoreTypeValueShadow` option. When enabled, a value binding that shares its name with a type-only declaration (type alias or interface) is not flagged, since types and values occupy separate namespaces in TypeScript.

- [#&#8203;9286](biomejs/biome#9286) [`52695cf`](biomejs/biome@52695cf) Thanks [@&#8203;Hugo-Polloli](https://github.com/Hugo-Polloli)! - Fixed [#&#8203;6316](biomejs/biome#6316): Biome now resolves Svelte `$store` references to the underlying `store` binding in semantic analysis, preventing false `noUndeclaredVariables` diagnostics when the store is declared.

- [#&#8203;10188](biomejs/biome#10188) [`ae659dd`](biomejs/biome@ae659dd) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Added a new nursery rule [`noExcessiveNestedCallbacks`](https://biomejs.dev/linter/rules/no-excessive-nested-callbacks/), which disallows callbacks nested deeper than the configured maximum.

- [#&#8203;9757](biomejs/biome#9757) [`2c62594`](biomejs/biome@2c62594) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Fixed [#&#8203;9450](biomejs/biome#9450): the HTML formatter now correctly preserves multiline formatting for nested `<template>` elements (e.g. `<template #body>`) when the source has children on separate lines. Previously, the children were collapsed onto a single line.

  ```diff
   <template>
     <UModal>
  -    <template #body> <p>content</p> </template>
  +    <template #body>
  +      <p>content</p>
  +    </template>
     </UModal>
   </template>
  ```

- [#&#8203;10118](biomejs/biome#10118) [`c6edcb4`](biomejs/biome@c6edcb4) Thanks [@&#8203;Netail](https://github.com/Netail)! - Fixed [#&#8203;10024](biomejs/biome#10024): `biome migrate eslint` correctly migrates `eslint` rules that belong to multiple Biome rules.

</details>

---

### Configuration

📅 **Schedule**: (UTC)

- Branch creation
  - At any time (no schedule defined)
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🚦 **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 [Mend Renovate](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My4xNjAuMiIsInVwZGF0ZWRJblZlciI6IjQzLjE2MC4yIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->

Reviewed-on: https://git.oirnoir.dev/OIRNOIR/YouTube-Helper-Client/pulls/2
OIRNOIR pushed a commit to OIRNOIR/YouTube-Helper-Server that referenced this pull request May 5, 2026
This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [@biomejs/biome](https://biomejs.dev) ([source](https://github.com/biomejs/biome/tree/HEAD/packages/@biomejs/biome)) | imports | patch | [`2.4.13` -> `2.4.14`](https://renovatebot.com/diffs/npm/@biomejs%2fbiome/2.4.13/2.4.14) |

---

### Release Notes

<details>
<summary>biomejs/biome (@&#8203;biomejs/biome)</summary>

### [`v2.4.14`](https://github.com/biomejs/biome/blob/HEAD/packages/@&#8203;biomejs/biome/CHANGELOG.md#2414)

[Compare Source](https://github.com/biomejs/biome/compare/@biomejs/biome@2.4.13...@biomejs/biome@2.4.14)

##### Patch Changes

- [#&#8203;9393](biomejs/biome#9393) [`491b171`](biomejs/biome@491b171) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Added the nursery rule [`useTestHooksOnTop`](https://biomejs.dev/linter/rules/use-test-hooks-on-top) in the `test` domain. The rule flags lifecycle hooks (`beforeEach`, `beforeAll`, `afterEach`, `afterAll`) that appear after test cases in the same block, enforcing that hooks are defined before any test case.

- [#&#8203;10157](biomejs/biome#10157) [`eefc5ab`](biomejs/biome@eefc5ab) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Fixed [#&#8203;7882](biomejs/biome#7882): The HTML parser will now emit better diagnostics when it encounters a void element with a closing tag, such as `<br></br>`. Previously, the parser would emit multiple diagnostics with conflicting advice. Now it emits a single diagnostic that clearly states that void elements should not have closing tags.

- [#&#8203;10054](biomejs/biome#10054) [`0e9f569`](biomejs/biome@0e9f569) Thanks [@&#8203;minseong0324](https://github.com/minseong0324)! - [`noMisleadingReturnType`](https://biomejs.dev/linter/rules/no-misleading-return-type/) no longer misses widening from concrete object types, class instances, object literals, tuples, functions, and regular expressions to `: object`.

  A function annotated `: object` returning an object literal:

  ```ts
  function f(): object {
    return { retry: true };
  }
  ```

- [#&#8203;10116](biomejs/biome#10116) [`53269eb`](biomejs/biome@53269eb) Thanks [@&#8203;jiwon79](https://github.com/jiwon79)! - Fixed [#&#8203;6201](biomejs/biome#6201): [`noUselessEscapeInRegex`](https://biomejs.dev/linter/rules/no-useless-escape-in-regex/) no longer flags an escaped backslash followed by `-` as a useless escape. Patterns like `/[\\-]/` are now considered valid because the second `\` is the escaped backslash, not an unnecessary escape of the trailing dash.

- [#&#8203;10092](biomejs/biome#10092) [`33d8543`](biomejs/biome@33d8543) Thanks [@&#8203;Conaclos](https://github.com/Conaclos)! - Fixed [#&#8203;9097](biomejs/biome#9097): [`organizeImports`](https://biomejs.dev/assist/actions/organize-imports/) no longer adds a blank line between a never-matched group and a matched group.

  Given the following `organizeImports` options:

  ```json
  {
    "groups": [":NODE:", ":BLANK_LINE:", ":PACKAGE:", ":BLANK_LINE:", ":PATH:"]
  }
  ```

  The following code...

  ```js
  // Comment
  import "package";
  import "./file.js";
  ```

  ...was organized as:

  ```diff
  +
    // Comment
    import "package";
  +
    import "./file.js";
  ```

  A blank line was added even though the group ':NODE:' doesn't match any imports here.
  `:BLANK_LINE:` between never-matched groups and matched groups are now ignored.
  The code is now organized as:

  ```diff
    // Comment
    import "package";
  +
    import "./file.js";
  ```

- [#&#8203;10138](biomejs/biome#10138) [`a10b6c1`](biomejs/biome@a10b6c1) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Fixed Vue `v-for` handling for [`noUndeclaredVariables`](https://biomejs.dev/linter/rules/no-undeclared-variables/) and [`noUnusedVariables`](https://biomejs.dev/linter/rules/no-unused-variables/). Biome now recognizes variables declared by `v-for` directives and references to iterated values in Vue templates.

- [#&#8203;10115](biomejs/biome#10115) [`d428d76`](biomejs/biome@d428d76) Thanks [@&#8203;minseong0324](https://github.com/minseong0324)! - [`noMisleadingReturnType`](https://biomejs.dev/linter/rules/no-misleading-return-type/) no longer reports false positives when a union return type's `boolean` variant is covered by both `true` and `false` returns.

- [#&#8203;9922](biomejs/biome#9922) [`7acf1e0`](biomejs/biome@7acf1e0) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Added the new nursery rule [`noReactStringRefs`](https://biomejs.dev/linter/rules/no-react-string-refs/), which disallows legacy React string refs such as `ref="hello"` and `this.refs.hello`.

  Biome also reports template-literal refs such as ``ref={`hello`}``, so React code can consistently migrate to callback refs, `createRef()`, or `useRef()`.

- [#&#8203;10010](biomejs/biome#10010) [`f3e76ab`](biomejs/biome@f3e76ab) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Fixed a bug in the LSP file watcher registration so Biome now watches `.biome.json` and `.biome.jsonc` configuration files and reloads workspace settings when they change.

- [#&#8203;10176](biomejs/biome#10176) [`8a40ef8`](biomejs/biome@8a40ef8) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Fixed [#&#8203;10011](biomejs/biome#10011): The [`noThisInStatic`](https://biomejs.dev/linter/rules/no-this-in-static/) rule no longer reports `this` when it is used as the constructor target in `new this(...)`, which is required for inherited static factory methods.

- [#&#8203;10163](biomejs/biome#10163) [`6867e96`](biomejs/biome@6867e96) Thanks [@&#8203;jiwon79](https://github.com/jiwon79)! - Fixed [#&#8203;9884](biomejs/biome#9884): The [`useSortedAttributes`](https://biomejs.dev/assist/actions/use-sorted-attributes/) auto-fix no longer corrupts source code when both an outer JSX element and a nested JSX-valued attribute have unsorted attributes in the same pass. Multiple unsorted groups separated by spread or shorthand attributes within the same JSX element are now reported as a single diagnostic.

- [#&#8203;10079](biomejs/biome#10079) [`d29dd19`](biomejs/biome@d29dd19) Thanks [@&#8203;Damix48](https://github.com/Damix48)! - Fixed false positive in `noAssignInExpressions` for Svelte `{@&#8203;const}` blocks. Assignments in `{@&#8203;const name = value}` are now correctly recognized as declarations rather than accidental assignments in expressions.

- [#&#8203;10080](biomejs/biome#10080) [`5d8fdac`](biomejs/biome@5d8fdac) Thanks [@&#8203;Damix48](https://github.com/Damix48)! - Fixed parsing of closing parentheses in Svelte `{#each}` block key expressions. Biome now correctly parses method calls and other parenthesised expressions used as keys.

  For example, the following snippets are now parsed correctly:

  ```svelte
  {#each numbers as number, index (number.toString())}
    <p>{number}</p>
  {/each}

  {#each numbers as number (key(number))}
    <p>{number}</p>
  {/each}
  ```

- [#&#8203;10140](biomejs/biome#10140) [`e7024b9`](biomejs/biome@e7024b9) Thanks [@&#8203;solithcy](https://github.com/solithcy)! - Fixed [#&#8203;10135](biomejs/biome#10135): Biome no longer crashes on missing Svelte template expressions.

  The following code snippet longer panics:

  ```svelte
  {#if }
   <p>^ this would previously crash</p>
  {/if}
  {@&#8203;const }
  <p>    ^ this would also crash</p>
  ```

- [#&#8203;10111](biomejs/biome#10111) [`7818009`](biomejs/biome@7818009) Thanks [@&#8203;jiwon79](https://github.com/jiwon79)! - Fixed [#&#8203;9997](biomejs/biome#9997): [`noDuplicateSelectors`](https://biomejs.dev/linter/rules/no-duplicate-selectors/) no longer reports false positives for selectors inside `@scope` queries. Biome now treats `@scope` as a separate at-rule context, like `@media`, `@supports`, `@container`, and `@starting-style`.

  The following snippet is no longer flagged as a duplicate:

  ```css
  .Example {
    padding: 0;
  }

  @&#8203;scope (.theme-dark) {
    .Example {
      color: white;
    }
  }
  ```

- [#&#8203;9926](biomejs/biome#9926) [`d62b331`](biomejs/biome@d62b331) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Added the nursery lint rule [`useMathMinMax`](https://biomejs.dev/linter/rules/use-math-min-max/), which prefers `Math.min()` and `Math.max()` over equivalent ternary comparisons.

  For example, this code:

  ```js
  const min = a < b ? a : b;
  ```

  is much more readable when rewritten as:

  ```js
  const min = Math.min(a, b);
  ```

- [#&#8203;10115](biomejs/biome#10115) [`d428d76`](biomejs/biome@d428d76) Thanks [@&#8203;minseong0324](https://github.com/minseong0324)! - [`useExhaustiveSwitchCases`](https://biomejs.dev/linter/rules/use-exhaustive-switch-cases/) now flags missing `true`/`false` cases for `boolean` discriminants, including when `boolean` is a union variant.

- [#&#8203;10125](biomejs/biome#10125) [`a55a0b6`](biomejs/biome@a55a0b6) Thanks [@&#8203;bmish](https://github.com/bmish)! - Fixed a resolver bug where packages that define a typed entry point through `package.json`'s `main` field but omit `types` were ignored during type-aware resolution. Type-aware rules such as [`noFloatingPromises`](https://biomejs.dev/linter/rules/no-floating-promises/) can now inspect imports from those packages.

- [#&#8203;10117](biomejs/biome#10117) [`895e809`](biomejs/biome@895e809) Thanks [@&#8203;denizdogan](https://github.com/denizdogan)! - Added support for the `corner-shape` family of CSS properties and the `superellipse()`/`squircle()` value functions, so [`noUnknownProperty`](https://biomejs.dev/linter/rules/no-unknown-property/) and [`noUnknownFunction`](https://biomejs.dev/linter/rules/no-unknown-function/) no longer flag them as unknown.

  New known properties: `corner-shape`, `corner-block-end-shape`, `corner-block-start-shape`, `corner-bottom-left-shape`, `corner-bottom-right-shape`, `corner-bottom-shape`, `corner-end-end-shape`, `corner-end-start-shape`, `corner-inline-end-shape`, `corner-inline-start-shape`, `corner-left-shape`, `corner-right-shape`, `corner-start-end-shape`, `corner-start-start-shape`, `corner-top-left-shape`, `corner-top-right-shape`, `corner-top-shape`.

  New known value functions: `superellipse()`, `squircle()`.

- [#&#8203;8620](biomejs/biome#8620) [`8df8f73`](biomejs/biome@8df8f73) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Fixed [#&#8203;8062](biomejs/biome#8062): Added support for parsing Vue `v-for` directives more accurately.

- [#&#8203;10191](biomejs/biome#10191) [`aa055cd`](biomejs/biome@aa055cd) Thanks [@&#8203;guney](https://github.com/guney)! - Now the rule [`noStaticElementInteractions`](https://biomejs.dev/linter/rules/no-static-element-interactions/) doesn't trigger custom elements.

- [#&#8203;9757](biomejs/biome#9757) [`2c62594`](biomejs/biome@2c62594) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Fixed [#&#8203;9099](biomejs/biome#9099): the HTML formatter collapsing non-text children (inline elements, Svelte expressions, comments) onto a single line when the source had them on separate lines. Biome now preserves the user's intended line breaks for exclusively non-text children.

  For example, the following Svelte snippet is now preserved instead of being collapsed to `<div>{name}<!-- comment --></div>`:

  ```svelte
  <div>
    {name}<!-- comment -->
  </div>
  ```

  Similarly, HTML elements like `<span>` inside a `<div>` are now preserved when written on their own line:

  ```html
  <div>
    <span>text</span>
  </div>
  ```

- [#&#8203;10105](biomejs/biome#10105) [`e7c1a6d`](biomejs/biome@e7c1a6d) Thanks [@&#8203;jiwon79](https://github.com/jiwon79)! - Fixed [#&#8203;10039](biomejs/biome#10039): [`useReadonlyClassProperties`](https://biomejs.dev/linter/rules/use-readonly-class-properties/) now detects unreassigned private members in class expressions and export default classes, not only in class declarations.

  The following patterns are now correctly flagged:

  ```ts
  const AnonClass = class {
    #prop = 123;
    constructor() {
      console.log(this.#prop);
    }
  };

  export default class {
    #prop = 123;
    constructor() {
      console.log(this.#prop);
    }
  }
  ```

- [#&#8203;10141](biomejs/biome#10141) [`46a77d0`](biomejs/biome@46a77d0) Thanks [@&#8203;minseong0324](https://github.com/minseong0324)! - Improved [`noUnnecessaryConditions`](https://biomejs.dev/linter/rules/no-unnecessary-conditions/) to detect conditions that are always truthy because they check built-in global class instances such as `Date`, `Map`, `Set`, `WeakMap`, and `Error`.

- [#&#8203;10178](biomejs/biome#10178) [`7b05a89`](biomejs/biome@7b05a89) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Fixed [#&#8203;10177](biomejs/biome#10177): The HTML parser no longer reports lowercase `html` or `doctype` text as invalid after void elements such as `<br>`.

- [#&#8203;10155](biomejs/biome#10155) [`0d4595d`](biomejs/biome@0d4595d) Thanks [@&#8203;jiwon79](https://github.com/jiwon79)! - Fixed [#&#8203;10045](biomejs/biome#10045): the CSS formatter no longer compounds indentation inside nested functional pseudo-classes such as `:not(:where(...))`, `:is(:where(...))`, and similar combinations. The same fix also removes one level of unnecessary indentation that was added inside any pseudo-class function whose argument list wrapped onto multiple lines, including `:nth-child(... of ...)`, `::part(...)`, and `:active-view-transition-type(...)`.
  The following snippet is now correctly formatted, matching Prettier.

  ```css
  input:not(
    :where(
      [type="submit"],
      [type="checkbox"],
      [type="radio"],
      [type="button"],
      [type="reset"]
    )
  ) {
    inline-size: 100%;
  }
  ```

- [#&#8203;10112](biomejs/biome#10112) [`6f0251e`](biomejs/biome@6f0251e) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Fixed [#&#8203;10110](biomejs/biome#10110): Biome's parser now accepts surrogate code points in JavaScript string `\u{...}` escapes.

- [#&#8203;10141](biomejs/biome#10141) [`46a77d0`](biomejs/biome@46a77d0) Thanks [@&#8203;minseong0324](https://github.com/minseong0324)! - Improved [`noMisleadingReturnType`](https://biomejs.dev/linter/rules/no-misleading-return-type/) to detect `object` return annotations that hide built-in global class instances such as `Date`, `Map`, `Set`, `WeakMap`, and `Error`.

- [#&#8203;10083](biomejs/biome#10083) [`4a664c1`](biomejs/biome@4a664c1) Thanks [@&#8203;ematipico](https://github.com/ematipico)! - Added two new options to [`noShadow`](https://biomejs.dev/linter/rules/no-shadow/), both defaulting to `true` to match typescript-eslint's behavior.

  Fixed [#&#8203;9482](biomejs/biome#9482): Added `ignoreFunctionTypeParameterNameValueShadow` option. When enabled, parameter names inside function type annotations (e.g. `(options: unknown) => void`) are not flagged as shadowing outer variables.

  Fixed [#&#8203;7812](biomejs/biome#7812): Added `ignoreTypeValueShadow` option. When enabled, a value binding that shares its name with a type-only declaration (type alias or interface) is not flagged, since types and values occupy separate namespaces in TypeScript.

- [#&#8203;9286](biomejs/biome#9286) [`52695cf`](biomejs/biome@52695cf) Thanks [@&#8203;Hugo-Polloli](https://github.com/Hugo-Polloli)! - Fixed [#&#8203;6316](biomejs/biome#6316): Biome now resolves Svelte `$store` references to the underlying `store` binding in semantic analysis, preventing false `noUndeclaredVariables` diagnostics when the store is declared.

- [#&#8203;10188](biomejs/biome#10188) [`ae659dd`](biomejs/biome@ae659dd) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Added a new nursery rule [`noExcessiveNestedCallbacks`](https://biomejs.dev/linter/rules/no-excessive-nested-callbacks/), which disallows callbacks nested deeper than the configured maximum.

- [#&#8203;9757](biomejs/biome#9757) [`2c62594`](biomejs/biome@2c62594) Thanks [@&#8203;dyc3](https://github.com/dyc3)! - Fixed [#&#8203;9450](biomejs/biome#9450): the HTML formatter now correctly preserves multiline formatting for nested `<template>` elements (e.g. `<template #body>`) when the source has children on separate lines. Previously, the children were collapsed onto a single line.

  ```diff
   <template>
     <UModal>
  -    <template #body> <p>content</p> </template>
  +    <template #body>
  +      <p>content</p>
  +    </template>
     </UModal>
   </template>
  ```

- [#&#8203;10118](biomejs/biome#10118) [`c6edcb4`](biomejs/biome@c6edcb4) Thanks [@&#8203;Netail](https://github.com/Netail)! - Fixed [#&#8203;10024](biomejs/biome#10024): `biome migrate eslint` correctly migrates `eslint` rules that belong to multiple Biome rules.

</details>

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Reviewed-on: https://git.oirnoir.dev/OIRNOIR/YouTube-Helper-Server/pulls/10
Marshmerrows added a commit to SKUsafe/SKUome that referenced this pull request May 6, 2026
Whitespace between `}` and `{` is HTML text and renders as a visible
space in the browser. Whitespace inside `{}` is a JS context and is
discarded. So when wrapping a long line containing `{a}{b}`, Biome
must break inside one of the expressions (or overflow), never between
them.

Previously the element list formatter emitted an
`if_group_fits_on_line(soft_line_break)` between any two adjacent
externally-whitespace-sensitive siblings, which inserted a layout
break in the unsafe HTML-text gap and silently changed rendered
output (e.g. `5g` → `5 g`).

Fix: when both adjacent NonText children are AnyHtmlTextExpression,
suppress the conditional break. The JS expression formatter inside
each `{}` will internally break long expressions when possible; if
neither can break the line overflows, which is the correct trade-off.

Same class of contract issue as biomejs#9099 / biomejs#9757; covers the wrap-point
selection case those left open.
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📝 Unnecessary line breaks with added spaces. 📝 HTML formatter collapses inline element content onto single line in Svelte files

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