.eslintrc.js

// eslint-disable-next-line @typescript-eslint/no-var-requires
const path = require('path');

module.exports = {
  parser: '@typescript-eslint/parser',
  parserOptions: {
    ecmaVersion: 2019,
    sourceType: 'module',
    ecmaFeatures: {
      jsx: true,
    },
    project: './tsconfig.json',
  },
  env: {
    browser: true,
    commonjs: true,
    es2020: true,
    node: true,
  },
  plugins: ['react', 'react-hooks', '@typescript-eslint'],
  extends: [
    'eslint:recommended',
    'plugin:react/recommended',
    'plugin:@typescript-eslint/eslint-recommended',
    'plugin:@typescript-eslint/recommended',
    'prettier',
    'prettier/@typescript-eslint',
    'prettier/react',
  ],
  settings: {
    react: {
      version: 'detect',
    },
  },
  rules: {
    'linebreak-style': ['error', 'unix'],
    'react-hooks/rules-of-hooks': 'error',
    'react-hooks/exhaustive-deps': 'warn',
    '@typescript-eslint/explicit-function-return-type': 'off',
    '@typescript-eslint/ban-ts-comment': 'off',
    'react/no-unknown-property': [2, { ignore: ['onload'] }],
  },
  overrides: [
    {
      // enable the rule specifically for TypeScript files
      files: ['*.ts', '*.tsx'],
      rules: {
        '@typescript-eslint/explicit-function-return-type': ['warn'],
      },
    },
    {
      // No prop types needed for Reac components in TypeScript
      files: ['**/*.tsx'],
      rules: {
        'react/prop-types': 'off',
      },
    },
    {
      // Rules specific for jest test files
      files: ['**/__tests__/**/*.[jt]s?(x)', '**/?(*.)+(spec|test).[jt]s?(x)'],
      plugins: ['jest'],
      extends: ['plugin:jest/recommended', 'plugin:jest/style'],
      env: {
        'jest/globals': true,
      },
      settings: {
        'import/resolver': {
          jest: {
            jestConfigFile: path.join(__dirname, './jest.config.js'),
          },
        },
      },
    },
  ],
};