About Flint

Danger

Flint is still very early stage and experimental. Not all features have been implemented.

Flint is a fast, friendly linter for JavaScript, TypeScript, and other languages in the web ecosystem. It is built as a “hybrid linter”, meaning:

• The core of Flint, as well as its lint rules, are written in TypeScript for approachability
• Language plugins may be written in native speed languages for performance

Flint’s goal is to create a seamless linting experience that is both fast and user-friendly. It is meant to include all the rules applicable to most web projects in its core, including JSON, Markdown, typed rules for JavaScript and TypeScript, and YML.

Getting Started

Note

The flint setup experience is not yet implemented.

Run flint in an existing project to set up a new configuration file. It will prompt you for what areas of linting you’d like to enable, create a configuration file for you, and install any new dependencies.

npm

npx flint

pnpm

pnpx flint

yarn

yarn dlx flint

Deep Dives

For more complete explanations on why Flint is experimenting with hybrid linting, read:

1. Hybrid Linters: The Best of Both Worlds
2. If I Wrote a Linter, Part 1: Architecture
3. If I Wrote a Linter, Part 2: Developer Experience
4. If I Wrote a Linter, Part 3: Ecosystem
5. If I Wrote a Linter, Part 4: Summary