Eslint config

Opinionated configuration for eslint & prettier.

• Usage
  • Next.js
  • Node.js
  • React Native / Expo
  • Prettier
  • Optional: JSON Formatting (package.json, tsconfig.json)

Usage

Install via npm:

npm install @sladg/eslint-config-base@latest --save-dev

Next.js

Version 15/16.

// eslint.config.js
import nextConfig from "@sladg/eslint-config-base/next"

export default defineConfig([
  nextConfig,
  {
    rules: {
      "no-console": "warn",
    },
  },
])

Node.js

Version 22 and up.

// eslint.config.js
import nodeConfig from "@sladg/eslint-config-base/node"

export default defineConfig([
  nodeConfig,
  {
    rules: {
      "no-console": "off",
    },
  },
])

React Native / Expo

// eslint.config.js
import nativeConfig from "@sladg/eslint-config-base/native"

export default defineConfig([nativeConfig])

Prettier

Prettier is integrated into ESLint's configuration via eslint-plugin-prettier. You can customize Prettier options through the prettier/prettier rule:

// eslint.config.js
import nodeConfig from "@sladg/eslint-config-base/node"

export default defineConfig([
  nodeConfig,
  {
    rules: {
      "prettier/prettier": [
        "error",
        {
          singleQuote: true,
          trailingComma: "all",
          arrowParens: "always",
          printWidth: 100,
        },
      ],
    },
  },
])

Optional: JSON Formatting (package.json, tsconfig.json)

For formatting and sorting package.json and tsconfig.json files:

// eslint.config.js
import nodeConfig from "@sladg/eslint-config-base/node"
import jsonConfig from "@sladg/eslint-config-base/optional/json"

export default defineConfig([nodeConfig, jsonConfig])