pnpm add eslint-config-sync-biome eslint-config-prettier --D

This plugin is optimized for flat config usage (eslint >= 9.0). See here for more details. Use it like this:

// eslint.config.js
import biome from "eslint-config-sync-biome";
export default [
  ...// other plugins
  biome.configs["flat/recommended"], // biome should be the last one
];

If you are using legacy configuration (eslint < 9.0), you can use the following config:

// .eslintrc.js
module.exports = {
  ... // other config
  extends: [
    ... // other presets
    "plugin:biome/recommended",
  ],
}

• flat/recommended/ recommended - Turn off all lint rules and format rules already supported by biome.(format rules originate from eslint-config-prettier).
• flat/only-lint/ only-lint - Turn off lint rules only

And then you can add the following script to your package.json:

{
  "scripts": {
    "lint": "npx biome lint . && npx eslint"
  }
}

You need to install both the biome and eslint extensions

In VSCode, to apply Biome and ESLint on save, you should have these in your project's .vscode/settings.json:

{
  "editor.codeActionsOnSave": {
    "source.fixAll.eslint": "explicit",
    "source.organizeImports.biome": "explicit",
    "quickfix.biome": "explicit"
  },
  "editor.defaultFormatter": "biomejs.biome"
}

MIT