Changelog

biomejs/biome · · 12 commits

CSS, Svelte, YAML and Tailwind land

Parser, formatter, and lint fixes plus a new Svelte rule; YAML formatting and Tailwind variants also expanded.

Mokto siketyan tim-we dyc3 jiwon79 denbezrukov Conaclos

Fix CSS selector lists inside :global()/:local() (Mokto99bc7df)

Biome’s CSS parser now accepts comma-separated selector lists in CSS Modules/Svelte-style pseudo-class functions like :global(.foo, .bar). This closes a real parsing gap that previously turned valid selectors into bogus pseudo-classes.

Truncate overly long diagnostics (dyc3935c59a)

Diagnostic rendering now trims extremely long lines and spans with ellipses so error output stays readable instead of sprawling across the terminal. This is a user-facing quality-of-life fix for pathological inputs.

Add useSvelteRequireEachKey nursery rule (Moktoc656679)

Biome adds a new Svelte lint rule that flags {#each} blocks missing keys, bringing coverage for a common correctness/performance footgun in Svelte apps. The change also wires the rule into config, migration, docs metadata, and the backend schema.

Parse destructuring rename bindings in Svelte each blocks (Moktoa1b5834)

The Svelte parser and formatter now support rename bindings like {#each items as { id, component: Filter }}. This fixes a syntax case that was previously rejected and required broad syntax/formatter/codegen updates.

Parse Tailwind variant expressions (jiwon7944c22e9)

Tailwind parsing now understands variant expressions, expanding support for more of the framework’s class syntax. The lexer and syntax tree were updated alongside a large batch of parser snapshots, indicating a substantial grammar expansion.

Implement YAML file handling (siketyan39ae9d5)

Biome adds a YAML file handler in the service layer, making YAML part of the core file-processing pipeline. This is the plumbing needed for YAML support to be discovered and routed correctly.

Preserve CSS declaration comment boundaries (denbezrukov1da3c75)

CSS and SCSS formatting now keeps spacing around comments that sit between a declaration name and : or after !important. That avoids reformats that can visually merge comments into syntax in a way that changes readability.

Fix useImportType separated-type behavior (Conaclose8e1e6a)

useImportType now handles the separatedType style correctly when a default import is present and all named imports are types. The fix also tightens the code that extracts combined specifiers into a new import statement.

Initial YAML formatter support for simple block mappings (siketyan46d4ee6)

Biome’s YAML formatter gets an initial pass at formatting simple block mappings instead of treating them purely verbatim. This is an important step toward real YAML pretty-printing, and the commit also updates comment handling and defaults around YAML formatting.

Initial YAML formatter support for block sequences (siketyand150071)

Block sequences are now formatted explicitly, along with supporting work in scalars and flow nodes. Together with the mapping work, this substantially broadens the formatter’s YAML coverage.

Other misc changes

  • Dependency/workflow bump: GitHub Actions major update (1 commit)