# Biome 2.5.10 — Biome CLI v2.5.10

- Product: Biome (https://whatsnew.fyi/product/biome)
- Vendor: Biome
- Date: 2026-08-21
- Version: 2.5.10
- Original notes: https://github.com/biomejs/biome/releases/tag/%40biomejs/biome%402.5.10
- Permalink: https://whatsnew.fyi/product/biome/releases/2.5.10

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

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

---

- **fixed** — Fixed Astro rejecting JavaScript comments between attributes
- **fixed** — Fixed a bare `<` in Astro text being treated as the start of a tag
- **fixed** — Fixed an Astro expression holding only a comment being reported as a parse error
- **fixed** — Fixed an empty Astro expression such as `<div>{}</div>` failing to parse
- **fixed** — Fixed Astro expressions containing a comment failing to parse
- **added** — Added support for Astro's fragment shorthand
- **fixed** — Fixed an Astro frontmatter block being cut short by a closing tag inside a string or comment
- **fixed** — Fixed `---` being read as an Astro frontmatter fence when markup precedes it
- **fixed** — Fixed an Astro frontmatter block ending early on a line that merely starts with a dash
- **fixed** — Fixed the children of an Astro element carrying `is:raw` being parsed as markup instead of raw text
- **fixed** — Fixed Astro rejecting attribute names that start with a colon
- **fixed** — Fixed the Astro parser failing to recover from a malformed closing tag
- **fixed** — Fixed `{` inside an Astro `<math>` element opening an expression
- **fixed** — Fixed `{{` at the start of an Astro expression being read as an interpolation

##### 2.5.10

###### Patch Changes

- [#11403](https://github.com/biomejs/biome/pull/11403) [`8f7786f`](https://github.com/biomejs/biome/commit/8f7786ff62aef61cf75a91e1604cd380456a60f4) Thanks [@Princesseuh](https://github.com/Princesseuh)! - Fixed Astro rejecting JavaScript comments between attributes.

  ```astro
  <div /* block comment */ class="something"></div>
  <Component /* c */ client:load />
  ```

- [#11403](https://github.com/biomejs/biome/pull/11403) [`8f7786f`](https://github.com/biomejs/biome/commit/8f7786ff62aef61cf75a91e1604cd380456a60f4) Thanks [@Princesseuh](https://github.com/Princesseuh)! - Fixed a bare `<` in Astro text being treated as the start of a tag, such as `<p>5 < 6 and 7 > 6</p>`. As in HTML, a `<` that cannot open a tag is text and needs no escaping.

- [#11438](https://github.com/biomejs/biome/pull/11438) [`3133ffa`](https://github.com/biomejs/biome/commit/3133ffa9ae6beaa3c4464edac60de47d5c6f6426) Thanks [@Princesseuh](https://github.com/Princesseuh)! - Fixed [#8294](https://github.com/biomejs/biome/issues/8294): an Astro expression holding only a comment is no longer reported as a parse error, which also stopped the whole file from being formatted.

  ```astro
  <div>{/* a note */}</div>
  <div class={/* a note */}>x</div>
  ```

- [#11403](https://github.com/biomejs/biome/pull/11403) [`8f7786f`](https://github.com/biomejs/biome/commit/8f7786ff62aef61cf75a91e1604cd380456a60f4) Thanks [@Princesseuh](https://github.com/Princesseuh)! - Fixed [#9165](https://github.com/biomejs/biome/issues/9165): an empty Astro expression such as `<div>{}</div>` no longer fails to parse. Astro renders `{}` as nothing.

- [#11403](https://github.com/biomejs/biome/pull/11403) [`8f7786f`](https://github.com/biomejs/biome/commit/8f7786ff62aef61cf75a91e1604cd380456a60f4) Thanks [@Princesseuh](https://github.com/Princesseuh)! - Fixed Astro expressions containing a comment failing to parse.

  ```astro
  <div>{/* block comment */ x}</div>
  <div>{/* only a comment */}</div>
  ```

- [#11403](https://github.com/biomejs/biome/pull/11403) [`8f7786f`](https://github.com/biomejs/biome/commit/8f7786ff62aef61cf75a91e1604cd380456a60f4) Thanks [@Princesseuh](https://github.com/Princesseuh)! - Added support for Astro's fragment shorthand.

  ```astro
  <>
    <p>a</p>
  </>
  ```

- [#11403](https://github.com/biomejs/biome/pull/11403) [`8f7786f`](https://github.com/biomejs/biome/commit/8f7786ff62aef61cf75a91e1604cd380456a60f4) Thanks [@Princesseuh](https://github.com/Princesseuh)! - Fixed an Astro frontmatter block being cut short by a closing tag inside a string or comment.

  ```astro
  ---
  const a = "</script>";
  // </script> in a comment
  ---
  ```

- [#11403](https://github.com/biomejs/biome/pull/11403) [`8f7786f`](https://github.com/biomejs/biome/commit/8f7786ff62aef61cf75a91e1604cd380456a60f4) Thanks [@Princesseuh](https://github.com/Princesseuh)! - Fixed `---` being read as an Astro frontmatter fence when markup precedes it. Astro only recognizes frontmatter at the very start of a file, so a file opening with a comment now has no frontmatter, and its `---` lines are content.

  ```astro
  <!-- c -->
  ---
  this is text, not frontmatter
  ---
  ```

- [#11403](https://github.com/biomejs/biome/pull/11403) [`8f7786f`](https://github.com/biomejs/biome/commit/8f7786ff62aef61cf75a91e1604cd380456a60f4) Thanks [@Princesseuh](https://github.com/Princesseuh)! - Fixed an Astro frontmatter block ending early on a line that merely starts with a dash.

  ```astro
  ---
  --count;
  ---
  ```

- [#11403](https://github.com/biomejs/biome/pull/11403) [`8f7786f`](https://github.com/biomejs/biome/commit/8f7786ff62aef61cf75a91e1604cd380456a60f4) Thanks [@Princesseuh](https://github.com/Princesseuh)! - Fixed the children of an Astro element carrying `is:raw` being parsed as markup instead of raw text. This now also covers `<script>` and `<style>`, whose contents Astro emits verbatim rather than processing, so they are no longer linted as

_[Truncated at 4000 characters — full notes: https://github.com/biomejs/biome/releases/tag/%40biomejs/biome%402.5.10]_