Biome: Web development toolchain for formatting and linting
Unified toolchain providing fast formatting and linting for JavaScript, TypeScript, CSS, and JSON with CLI and LSP.
Learn more about Biome
Biome is a web development toolchain that consolidates formatting and linting functionality into a single tool. It processes JavaScript, TypeScript, JSX, JSON, CSS, and GraphQL files through a shared parser and analysis engine. The tool provides over 340 linting rules derived from ESLint and typescript-eslint, along with formatting that maintains 97% compatibility with Prettier. Biome operates as both a command-line interface and Language Server Protocol implementation for editor integration.
Unified Architecture
Combines formatting and linting in a single tool with shared parsing and analysis infrastructure. This unified approach reduces tooling complexity and provides consistent code processing.
No Node.js Dependency
Runs independently without requiring Node.js runtime, making it suitable for various deployment environments. The tool can be installed and executed in contexts where Node.js is not available.
Full Fidelity Parser
Maintains complete source text representation with sophisticated error recovery capabilities. The parser preserves all original formatting and whitespace information for accurate code transformations.
New nursery rule for globalThis enforcement and various parsing improvements
- –Added the nursery rule `useGlobalThis`. This rule enforces using `globalThis` over `window`, `self` and `global`
- –Improved parsing recovery when encountering qualified rules inside CSS `@page` at-rule blocks
- –`useExhaustiveDependencies` now correctly suggests dependencies without including callback-scoped variables or method names
- –Type aliases with generic parameters that have `extends` constraints now properly indent comments after the equals sign
Vue.js support improvements, Tailwind CSS parsing fixes, and new enum consistency rule
- –Biome now parses Vue dynamic slot shorthand arguments that use template literals in `[]`
- –Tailwind `@utility` directives now parse functional utility names like `px-*` when Tailwind directives are enabled
- –Fixed an issue with `biome migrate eslint` where it couldn't detect rules for CSS, GraphQL, and HTML
- –Fix the `--reporter=summary` output incorrectly merging and displaying wrong issue counts for different rules
- –Added new nursery rule `use-consistent-enum-value-type`. This rule disallows enums from having both number and string members
New HTML and Vue.js linting rules with parser improvements and bug fixes
- –Added new nursery rule `noDuplicateAttributes` to forbid duplicate attributes in HTML elements
- –Added a new nursery rule `noVueOptionsApi`
- –Properly handle `parameters` metavariables for `arrow_function` GritQL queries
- –Fixed `noUnusedVariables` to ignore type parameters declared in ambient contexts such as `declare module` blocks
- –The HTML parser can now parse directive modifiers with a single colon, e.g. `@keydown.:`
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