.eslintrc.js

// https:/typescript-eslint/typescript-eslint
// https:/TristonJ/eslint-plugin-prefer-arrow
// https:/sindresorhus/eslint-plugin-unicorn
// https:/benmosher/eslint-plugin-import
// https:/gajus/eslint-plugin-jsdoc

module.exports = {
  env: {
    browser: true,
    node: true,
  },
  ignorePatterns: ['.eslintrc.js', '**/dist/**', '**/node_modules/**', '**/coverage/**'],
  extends: [
    'eslint:recommended',
    'plugin:import/errors',
    'plugin:import/warnings',
    'plugin:import/typescript',
    'plugin:prettier/recommended',
    'plugin:@typescript-eslint/recommended',
    'plugin:@typescript-eslint/recommended-requiring-type-checking',
    'prettier',
  ],
  parser: '@typescript-eslint/parser',
  parserOptions: {
    project: 'tsconfig.json',
    sourceType: 'module',
  },
  plugins: ['@typescript-eslint', 'import', 'jsdoc', 'unicorn', 'prefer-arrow'],
  settings: {
    'import/resolver': {
      node: {
        extensions: ['.ts', '.tsx', '.json', '.js'],
        moduleDirectory: ['src', 'node_modules'],
      },
    },
  },
  rules: {
    'prettier/prettier': 'error',
    '@typescript-eslint/adjacent-overload-signatures': 'error',
    '@typescript-eslint/array-type': [
      'error',
      {
        default: 'array',
      },
    ],
    '@typescript-eslint/ban-types': [
      'error',
      {
        types: {
          Object: {
            message: 'Avoid using the `Object` type. Did you mean `object`?',
          },
          Function: {
            message: 'Avoid using the `Function` type. Prefer a specific function type, like `() => void`.',
          },
          Boolean: {
            message: 'Avoid using the `Boolean` type. Did you mean `boolean`?',
          },
          Number: {
            message: 'Avoid using the `Number` type. Did you mean `number`?',
          },
          String: {
            message: 'Avoid using the `String` type. Did you mean `string`?',
          },
          Symbol: {
            message: 'Avoid using the `Symbol` type. Did you mean `symbol`?',
          },
        },
      },
    ],
    '@typescript-eslint/consistent-type-assertions': 'off',
    '@typescript-eslint/dot-notation': 'error',
    '@typescript-eslint/explicit-member-accessibility': [
      'error',
      {
        accessibility: 'no-public',
      },
    ],
    '@typescript-eslint/indent': 'off',
    '@typescript-eslint/member-delimiter-style': [
      'error',
      {
        multiline: {
          delimiter: 'semi',
          requireLast: true,
        },
        singleline: {
          delimiter: 'semi',
          requireLast: false,
        },
      },
    ],
    '@typescript-eslint/no-empty-function': 'off',
    '@typescript-eslint/no-empty-interface': 'error',
    '@typescript-eslint/no-explicit-any': 'warn',
    '@typescript-eslint/no-misused-new': 'error',
    '@typescript-eslint/no-namespace': 'error',
    '@typescript-eslint/no-parameter-properties': 'off',
    '@typescript-eslint/no-this-alias': 'error',
    '@typescript-eslint/no-unused-expressions': [
      'error',
      {
        allowShortCircuit: true,
      },
    ],
    '@typescript-eslint/no-use-before-define': 'off',
    '@typescript-eslint/no-var-requires': 'error',
    '@typescript-eslint/prefer-for-of': 'error',
    '@typescript-eslint/prefer-function-type': 'error',
    '@typescript-eslint/prefer-namespace-keyword': 'error',
    '@typescript-eslint/quotes': [
      'error',
      'single',
      {
        avoidEscape: true,
      },
    ],
    '@typescript-eslint/semi': ['error', 'always'],
    '@typescript-eslint/strict-boolean-expressions': ['error', {}],
    '@typescript-eslint/triple-slash-reference': [
      'error',
      {
        path: 'always',
        types: 'prefer-import',
        lib: 'always',
      },
    ],
    '@typescript-eslint/type-annotation-spacing': 'off',
    '@typescript-eslint/unified-signatures': 'error',
    '@typescript-eslint/unbound-method': 'off',
    '@typescript-eslint/no-unsafe-member-access': 'error',
    '@typescript-eslint/no-unsafe-call': 'error',
    '@typescript-eslint/no-unsafe-assignment': 'error',
    '@typescript-eslint/no-unsafe-return': 'error',
    '@typescript-eslint/restrict-template-expressions': 'error',
    '@typescript-eslint/explicit-module-boundary-types': 'off',
    '@typescript-eslint/no-unused-vars': ['off'],
    '@typescript-eslint/no-for-in-array': ['off'],
    '@typescript-eslint/no-floating-promises': ['error', { ignoreVoid: true, ignoreIIFE: true }],
    '@typescript-eslint/no-misused-promises': 'error',
    '@typescript-eslint/no-shadow': ['error'],
    '@typescript-eslint/no-redeclare': ['error'],
    'arrow-parens': ['off', 'always'],
    'brace-style': ['off', 'off'],
    camelcase: 'warn',
    'comma-dangle': 'off',
    'no-unused-vars': 'off',
    complexity: [
      'warn',
      {
        max: 20,
      },
    ],
    'constructor-super': 'error',
    'default-case': 'error',
    'eol-last': 'off',
    eqeqeq: ['error', 'smart'],
    'guard-for-in': 'off',
    'id-blacklist': [
      'warn',
      'any',
      'Number',
      'number',
      'String',
      'string',
      'Boolean',
      'boolean',
      'Undefined',
      'undefined',
    ],
    'id-match': 'error',
    'import/order': [
      'error',
      {
        groups: [['builtin', 'external'], ['internal', 'unknown', 'object'], ['parent'], ['sibling', 'index']],
        'newlines-between': 'always',
        alphabetize: { order: 'asc', caseInsensitive: true },
      },
    ],
    'import/no-self-import': 'error',
    'jsdoc/check-alignment': 'error',
    'jsdoc/check-indentation': 'error',
    'jsdoc/newline-after-description': 'error',
    'linebreak-style': ['error', 'unix'],
    'max-classes-per-file': ['error', 1],
    'max-len': [
      'error',
      {
        code: 120,
      },
    ],
    'new-parens': 'off',
    'newline-per-chained-call': 'off',
    'no-bitwise': 'off',
    'no-caller': 'error',
    'no-cond-assign': 'error',
    'no-console': 'error',
    'no-debugger': 'error',
    'no-duplicate-case': 'error',
    'no-duplicate-imports': 'error',
    'no-empty': 'off',
    'no-eval': 'error',
    'no-extra-bind': 'error',
    'no-extra-semi': 'off',
    'no-fallthrough': 'error',
    'no-invalid-this': 'off',
    'no-irregular-whitespace': 'off',
    'no-multiple-empty-lines': [
      'error',
      {
        max: 1,
      },
    ],
    'no-new-func': 'error',
    'no-new-wrappers': 'error',
    'no-redeclare': 'off',
    'no-return-await': 'error',
    'no-sequences': 'error',
    'no-shadow': 'off',
    'no-sparse-arrays': 'error',
    'no-template-curly-in-string': 'error',
    'no-throw-literal': 'error',
    'no-trailing-spaces': 'off',
    'no-undef-init': 'error',
    'no-underscore-dangle': 'error',
    'no-unsafe-finally': 'error',
    'no-unused-labels': 'error',
    'no-constant-condition': ['error', { checkLoops: false }],
    'no-var': 'error',
    'object-shorthand': 'error',
    'one-var': ['error', 'never'],
    'prefer-arrow/prefer-arrow-functions': 'off',
    'prefer-const': 'error',
    'prefer-object-spread': 'error',
    'prefer-template': 'error',
    'quote-props': ['error', 'as-needed'],
    radix: 'error',
    'space-before-function-paren': [
      'error',
      {
        anonymous: 'always',
        asyncArrow: 'always',
        named: 'never',
      },
    ],
    'space-in-parens': ['off', 'never'],
    'spaced-comment': [
      'error',
      'always',
      {
        markers: ['/'],
      },
    ],
    'unicorn/filename-case': 'error',
    'use-isnan': 'warn',
    'valid-typeof': 'off',
    'prefer-rest-params': 'warn',
    'sort-imports': ['error', { ignoreDeclarationSort: true }],
  },
};