.eslintrc.js

const OFF = 0;
const WARN = 1;
const ERROR = 2;

module.exports = {
  env: {
    browser: true,
    es6: true,
    node: true,
  },
  extends: ['airbnb-base'],
  globals: {
    Atomics: 'readonly',
    SharedArrayBuffer: 'readonly',
  },
  parser: '@typescript-eslint/parser',
  parserOptions: {
    ecmaVersion: 2018,
    sourceType: 'module',
  },
  plugins: ['@typescript-eslint'],
  settings: {
    'import/resolver': {
      node: { extensions: ['.tsx', '.ts', '.js', '.json'] },
      typescript: {},
    },
  },
  rules: {
    'import/extensions': [
      ERROR,
      'ignorePackages',
      {
        ts: 'never',
        js: 'never',
      },
    ],
    'import/no-extraneous-dependencies': OFF,
    'import/prefer-default-export': OFF,

    '@typescript-eslint/indent': [2, ERROR],
    '@typescript-eslint/no-use-before-define': OFF,
    '@typescript-eslint/no-param-reassign': OFF,

    'lines-between-class-members': [ERROR, 'always'],
    'linebreak-style': [ERROR, 'unix'],
    quotes: [ERROR, 'single'],
    semi: [ERROR, 'always'],
    'no-unused-expressions': WARN,
    'no-plusplus': OFF,
    'no-console': OFF,
    'class-methods-use-this': ERROR,
    'global-require': OFF,
    'no-use-before-define': OFF,
    'no-restricted-syntax': OFF,
    'no-continue': OFF,
    indent: OFF,
    'no-param-reassign': OFF,
    'no-unused-vars': WARN,
    'object-curly-newline': [
      WARN,
      {
        ObjectExpression: {
          multiline: true,
          minProperties: 3,
        },
        ObjectPattern: { multiline: true },
        ImportDeclaration: 'never',
        ExportDeclaration: {
          multiline: true,
          minProperties: 3,
        },
      },
    ],
  },
};