biome

Biome is described by its maintainers as a performant toolchain for web projects, bundling formatting and linting into a single tool that can be used from the command line or interactively inside an editor. Formatting: Biome formats JavaScript, TypeScript, JSX, JSON, CSS and GraphQL. The README states it scores 97% compatibility with Prettier, based on a compatibility challenge, and links to a separate benchmark repository for formatting performance. Linting: Biome lints the same set of languages and offers more than 500 rules drawn from ESLint, typescript-eslint and other sources. Its diagnostics are intended to be detailed and contextual, with the stated goal of helping developers improve their code. Rules and their documentation are listed on the project website. Editor integration: Biome is designed to be used interactively in an editor, capable of formatting and linting code as it is written. It provides first-party extensions for VS Code (and Open VSX) among other editor integrations, and offers LSP support built on its own parser, which the README says represents source text in full fidelity and includes error recovery. Installation and usage: The package is installed from npm as a development dependency with a pinned version (`npm install --save-dev --save-exact @biomejs/biome`). Typical commands include `npx @biomejs/biome format --write`, `npx @biomejs/biome lint --write`, `npx @biomejs/biome check --write` to combine format, lint and related checks, and `npx @biomejs/biome ci` to validate all files in CI environments. An online WebAssembly playground is available for trying it without installing. Other stated characteristics: Biome ships with defaults and does not require configuration; it aims to support all main languages used in modern web development; it does not require Node.js to function (a manual installation guide is provided); and it unifies functionality that was previously spread across separate tools, so that code processing, error display, parallelization, caching and configuration share one base. The project also publishes documentation, a getting-started guide and an internals section covering its philosophy and language support. Licensing and funding: Biome is dual-licensed under MIT or Apache 2.0 and is moderated under the Contributor Covenant Code of Conduct. Funding and sponsorship options include Open Collective, GitHub Sponsors, a sponsorship program for company visibility, and enterprise support in which core contributors can be employed for company-focused work. The README lists platinum, gold, silver and bronze sponsors.