@lunit/eslint-config

A TypeScript ESLint ruleset designed for Lunit projects based on @rushstack/eslint-config.

This ESLint configuration is only available for TypeScript projects.

Installation

npm install --save-dev @lunit/eslint-config

Usage

Getting Started

@lunit/eslint-config v2.x is configured using the ESLint Flat Config approach.

For information regarding ESLint Flat Config, please refer to the relevant ESLint Blog post.

• https://eslint.org/blog/2022/08/new-config-system-part-2/

To use it, add @lunit/eslint-config to your eslint.config.js file as follows. If you are using TypeScript ESLint rules, please remove them. This is already being used in Rushstack ESLint, causing conflict issues.

ESM

// eslint.config.js
import js from "@eslint/js";
import globals from "globals";
import reactHooks from "eslint-plugin-react-hooks";
import reactRefresh from "eslint-plugin-react-refresh";
import { defineConfig, globalIgnores } from "eslint/config";
import eslintConfig from '@lunit/eslint-config';

export default defineConfig([
  globalIgnores(["dist"]),
  {
    files: ["**/*.{ts,tsx}"],
    extends: [
      js.configs.recommended,
      reactHooks.configs.flat["recommended-latest"],
      reactRefresh.configs.vite,
    ],
    languageOptions: {
      ecmaVersion: 2020,
      globals: globals.browser,
    },
  },
  lunitEslintConfig,
]);

CommonJS

// eslint.config.cjs
const js = require("@eslint/js");
const  globals = require("globals");
const reactHooks = require("eslint-plugin-react-hooks");
const reactRefresh = require("eslint-plugin-react-refresh");
const { defineConfig, globalIgnores } = require("eslint/config");
const lunitEslintConfig = require('@lunit/eslint-config');

module.exports = defineConfig([
  globalIgnores(["dist"]),
  {
    files: ["**/*.{ts,tsx}"],
    extends: [
      js.configs.recommended,
      reactHooks.configs.flat["recommended-latest"],
      reactRefresh.configs.vite,
    ],
    languageOptions: {
      ecmaVersion: 2020,
      globals: globals.browser,
    },
  },
  // You can add the ESLint Config rules as follows.
  lunitEslintConfig,
]);

If you created the app using vite, please refer to the information below.

If the tsconfig.json file is separate and the actual rules are applied in tsconfig.app.json, please configure it as follows.

rushstack eslint config internally follows the rules set in tsconfig, so you must link the corresponding JSON file.

ESM

// eslint.config.js
import js from "@eslint/js";
import globals from "globals";
import reactHooks from "eslint-plugin-react-hooks";
import reactRefresh from "eslint-plugin-react-refresh";
import { defineConfig, globalIgnores } from "eslint/config";
import eslintConfig from '@lunit/eslint-config';

export default defineConfig([
  globalIgnores(["dist"]),
  {
    files: ["**/*.{ts,tsx}"],
    extends: [
      js.configs.recommended,
      reactHooks.configs.flat["recommended-latest"],
      reactRefresh.configs.vite,
    ],
    languageOptions: {
      ecmaVersion: 2020,
      globals: globals.browser,
    },
  },
  {
    ...eslintConfig,
    // You must integrate the tsconfig.app.json file applied to the actual ts and tsx files as shown below.
    languageOptions: {
      parserOptions: {
        project: ["./tsconfig.app.json"],
        tsconfigRootDir: import.meta.dirname,
      },
    },
  }
]);

CommonJS

// eslint.config.cjs
const js = require("@eslint/js");
const  globals = require("globals");
const reactHooks = require("eslint-plugin-react-hooks");
const reactRefresh = require("eslint-plugin-react-refresh");
const { defineConfig, globalIgnores } = require("eslint/config");
const lunitEslintConfig = require('@lunit/eslint-config');

module.exports = defineConfig([
  globalIgnores(["dist"]),
  {
    files: ["**/*.{ts,tsx}"],
    extends: [
      js.configs.recommended,
      reactHooks.configs.flat["recommended-latest"],
      reactRefresh.configs.vite,
    ],
    languageOptions: {
      ecmaVersion: 2020,
      globals: globals.browser,
    },
  },
  {
    ...lunitEslintConfig,
    // You must integrate the tsconfig.app.json file applied to the actual ts and tsx files as shown below.
    languageOptions: {
      parserOptions: {
        project: ["./tsconfig.app.json"],
        tsconfigRootDir: __dirname,
      },
    },
  }
]);

Advanced

Override rushstack eslint rule

If you wish to modify the Rushstack ESLint rule, please refer to the code below.

ESM

// eslint.config.js
import js from "@eslint/js";
import globals from "globals";
import reactHooks from "eslint-plugin-react-hooks";
import reactRefresh from "eslint-plugin-react-refresh";
import { defineConfig, globalIgnores } from "eslint/config";
import eslintConfig from '@lunit/eslint-config';

export default defineConfig([
  globalIgnores(["dist"]),
  {
    files: ["**/*.{ts,tsx}"],
    extends: [
      js.configs.recommended,
      reactHooks.configs.flat["recommended-latest"],
      reactRefresh.configs.vite,
    ],
    languageOptions: {
      ecmaVersion: 2020,
      globals: globals.browser,
    },
  },
  {
    // Using Spread Operator lunit Eslint Config
    ...lunitEslintConfig,
    rules: {
      // Using Spread Operator lunit Eslint Config Rules
      ...lunitEslintConfig.rules,
      // And apply the target rule
      '@rushstack/no-new-null': 'error',
    },
  }
]);

CommonJS

// eslint.config.cjs
const js = require("@eslint/js");
const  globals = require("globals");
const reactHooks = require("eslint-plugin-react-hooks");
const reactRefresh = require("eslint-plugin-react-refresh");
const { defineConfig, globalIgnores } = require("eslint/config");
const lunitEslintConfig = require('@lunit/eslint-config');

module.exports = defineConfig([
  globalIgnores(["dist"]),
  {
    files: ["**/*.{ts,tsx}"],
    extends: [
      js.configs.recommended,
      reactHooks.configs.flat["recommended-latest"],
      reactRefresh.configs.vite,
    ],
    languageOptions: {
      ecmaVersion: 2020,
      globals: globals.browser,
    },
  },
  {
    // Using Spread Operator lunit Eslint Config
    ...lunitEslintConfig,
    rules: {
      // Using Spread Operator lunit Eslint Config Rules
      ...lunitEslintConfig.rules,
      // And apply the target rule
      '@rushstack/no-new-null': 'error',
    },
  }
]);

Migrate 1.x to 2.x

Since migration to the ESLint flat config is required, please refer to the official ESLint documentation guide below.

• https://eslint.org/docs/latest/use/configure/migration-guide