.eslintrc.js

module.exports = {
  parser: '@typescript-eslint/parser',
  plugins: ['@typescript-eslint'],
  extends: [
    'plugin:@typescript-eslint/recommended',
    'prettier/@typescript-eslint',
    'plugin:prettier/recommended',
    'plugin:react/recommended',
  ],
  plugins: ['import', 'jest'],

  env: {
    es6: true,
    node: true,
    mocha: true,
    browser: true,
  },

  parserOptions: {
    sourceType: 'module',
    ecmaVersion: 6,
    ecmaFeatures: {
      experimentalObjectRestSpread: true,
      jsx: true,
    },
    // NOTE: That is to avoid a known performance issue related with the `ts.Program` used by
    // typescript eslint. As we are not using rules that need types information, we can safely
    // disabling that feature setting the project to undefined. That issue is being addressed
    // by the typescript eslint team. More info could be found here:
    // https://github.com/typescript-eslint/typescript-eslint/issues/389
    // https://github.com/typescript-eslint/typescript-eslint/issues/243
    // https://github.com/typescript-eslint/typescript-eslint/pull/361
    project: undefined,
  },
  rules: {
    'no-unused-vars': ['error', {
      vars: 'all',
      args: 'after-used',
      ignoreRestSiblings: true,
    },],
    '@typescript-eslint/no-unused-vars': [
      'error',
      {
        vars: 'all',
        args: 'after-used',
        ignoreRestSiblings: true,
      },
    ],
    'comma-dangle': ['error', 'always-multiline'],
    'sort-keys': 'off',
    'import/no-default-export': 'error',
    'import/no-unresolved': 'error',
    'no-irregular-whitespace': 'error',
    'no-unused-expressions': 'error',
    quotemark: [true, 'single', 'jsx-double'],
    '@typescript-eslint/interface-name-prefix': 'off',
    '@typescript-eslint/explicit-member-accessibility': ['error', { accessibility: 'no-public' }],
    '@typescript-eslint/no-explicit-any': 'off',
    '@typescript-eslint/explicit-function-return-type': 'off',
    '@typescript-eslint/no-non-null-assertion': 'off',
    '@typescript-eslint/no-use-before-define': 'off',
  },

  settings: {
    'import/resolver': {
      node: {
        extensions: ['.mjs', '.js', '.json', '.ts', '.tsx'],
      },
    },
    react: {
      version: 'detect',
    },
  },
};