.eslintrc.js

module.exports = {
  parser: '@typescript-eslint/parser',
  extends: [
    'google',
    'plugin:react/recommended',
    'eslint:recommended',
    'plugin:@typescript-eslint/recommended',
  ],
  plugins: ['react', '@typescript-eslint', 'unused-imports'],
  env: {
    browser: true,
    es2021: true,
    node: true,
  },
  globals: {
    window: true,
  },
  parserOptions: {
    ecmaFeatures: {
      jsx: true,
    },
    ecmaVersion: 12,
    sourceType: 'module',
  },
  rules: {
    '@typescript-eslint/type-annotation-spacing': 'warn',
    '@typescript-eslint/ban-ts-comment': 'warn',
    '@typescript-eslint/camelcase': 'off',
    '@typescript-eslint/explicit-function-return-type': [
      'warn',
      {
        allowExpressions: true,
        allowTypedFunctionExpressions: true,
        allowHigherOrderFunctions: true,
        allowDirectConstAssertionInArrowFunctions: true,
        allowConciseArrowFunctionExpressionsStartingWithVoid: false,
      },
    ],
    '@typescript-eslint/explicit-module-boundary-types': [
      'warn',
      {
        allowArgumentsExplicitlyTypedAsAny: true,
        allowDirectConstAssertionInArrowFunctions: true,
        allowedNames: [],
        allowHigherOrderFunctions: true,
        allowTypedFunctionExpressions: true,
      },
    ],
    '@typescript-eslint/no-explicit-any': 'off',
    '@typescript-eslint/no-invalid-this': ['error'],
    '@typescript-eslint/no-unused-vars': ['warn', { varsIgnorePattern: '_' }],
    '@typescript-eslint/no-empty-function': ['warn'],
    '@typescript-eslint/no-non-null-assertion': ['off'],
    'func-call-spacing': 'off',
    camelcase: 'off',
    'arrow-parens': ['error', 'always'],
    indent: [
      'error',
      2,
      {
        ignoredNodes: [
          'FunctionExpression > .params[decorators.length > 0]',
          'FunctionExpression > .params > :matches(Decorator, :not(:first-child))',
          'ClassBody.body > PropertyDefinition[decorators.length > 0] > .key',
        ],
      },
    ],
    // https://github.com/typescript-eslint/typescript-eslint/issues/1824
    // "@typescript-eslint/indent": ["error", 2],
    'max-len': [
      1,
      {
        code: 110,
        ignoreComments: true,
        ignorePattern:
          "^(\\s*[a-zA-Z_]+: '[^']+'[,;]*)|(.*interpolate.*)|(.*require.*)|(.*_\\.template.*)|(<svg .*)|(<rect .*)|(<polygon .*)$",
        ignoreRegExpLiterals: true,
        ignoreTrailingComments: true,
        ignoreUrls: true,
        tabWidth: 2,
      },
    ],
    'no-console': 'warn',
    'no-invalid-this': 'off',
    'no-mixed-operators': 'error',
    'no-multiple-empty-lines': ['warn', { max: 1 }],
    'no-nested-ternary': 'error',
    'no-param-reassign': 'error',
    'no-plusplus': 'error',
    'object-curly-spacing': ['warn', 'always'],
    'quote-props': ['error', 'as-needed'],
    quotes: ['error', 'single'],
    radix: [1, 'as-needed'],
    'react/display-name': 'off',
    'react/jsx-wrap-multilines': [
      'warn',
      {
        arrow: 'parens',
        assignment: 'parens',
        condition: 'parens',
        declaration: 'parens',
        logical: 'parens',
        prop: 'parens',
        return: 'parens-new-line',
      },
    ],
    'react/sort-comp': [
      'warn',
      {
        groups: {
          lifecycle: [
            'statics',
            'displayName',
            'propTypes',
            'contextTypes',
            'childContextTypes',
            'mixins',
            'defaultProps',
            'constructor',
            'getDefaultProps',
            'state',
            'getInitialState',
            'getChildContext',
            'getDerivedStateFromProps',
            'componentWillMount',
            'UNSAFE_componentWillMount',
            'componentDidMount',
            'componentWillReceiveProps',
            'UNSAFE_componentWillReceiveProps',
            'shouldComponentUpdate',
            'componentWillUpdate',
            'UNSAFE_componentWillUpdate',
            'getSnapshotBeforeUpdate',
            'componentDidUpdate',
            'componentDidCatch',
            'componentWillUnmount',
          ],
        },
        order: ['static-methods', 'instance-variables', 'lifecycle', 'everything-else', 'render'],
      },
    ],
    'require-jsdoc': 'off',
    semi: ['error', 'always'],
    'space-infix-ops': ['error', { int32Hint: false }],
    'unused-imports/no-unused-imports': 'error',
    'unused-imports/no-unused-vars': [
      'warn',
      {
        args: 'after-used',
        argsIgnorePattern: '^_',
        vars: 'all',
        varsIgnorePattern: '^_',
      },
    ],
    eqeqeq: ['error', 'always'],
  },
  settings: {
    react: {
      version: 'detect',
    },
  },
};