.eslintrc.yml

parser: '@typescript-eslint/parser'

parserOptions:
  ecmaFeatures:
    jsx: true
  ecmaVersion: latest
  sourceType: module
  project: ./tsconfig.json

env:
  browser: true
  es6: true
  node: true
  jest: true

ignorePatterns: ['index.js']

plugins:
  - import
  - '@typescript-eslint'

extends:
  - eslint:recommended
  - plugin:prettier/recommended

rules:
  # 0 = off, 1 = warn, 2 = error
  'space-before-function-paren': 0
  'no-useless-constructor': 0
  'no-undef': 2
  'no-console': [2, { allow: ['error', 'warn', 'info', 'assert'] }]
  'comma-dangle': ['error', 'only-multiline']
  'no-unused-vars': 0
  'no-var': 2
  'one-var-declaration-per-line': 2
  'prefer-const': 2
  'no-const-assign': 2
  'no-duplicate-imports': 2
  'no-use-before-define': [2, { 'functions': false, 'classes': false }]
  'eqeqeq': [2, 'always', { 'null': 'ignore' }]
  'no-case-declarations': 0
  'no-restricted-syntax':
    [
      2,
      {
        'selector': 'BinaryExpression[operator=/(==|===|!=|!==)/][left.raw=true], BinaryExpression[operator=/(==|===|!=|!==)/][right.raw=true]',
        'message': Don't compare for equality against boolean literals,
      },
    ]

  # https://github.com/benmosher/eslint-plugin-import/pull/334
  'import/no-duplicates': 2
  'import/first': 2
  'import/newline-after-import': 2
  'import/order':
    [
      2,
      {
        'newlines-between': 'always',
        'alphabetize': { 'order': 'asc' },
        'groups': ['builtin', 'external', 'internal', 'parent', 'sibling', 'index'],
      },
    ]

overrides:
  - files:
      - ./**/*{.ts,.tsx,.js}
    rules:
      'no-unused-vars': [2, { varsIgnorePattern: '^_', argsIgnorePattern: '^_', ignoreRestSiblings: true }]
      'no-undef': 0
      # TypeScript declare merge
      'no-redeclare': 0
      'no-useless-constructor': 0
      'no-dupe-class-members': 0
      'no-case-declarations': 0
      'no-duplicate-imports': 0
      # TypeScript Interface and Type
      'no-use-before-define': 0
      'semi': [2, 'always']
      '@typescript-eslint/adjacent-overload-signatures': 2
      '@typescript-eslint/await-thenable': 2
      '@typescript-eslint/consistent-type-assertions': 2
      '@typescript-eslint/ban-types':
        [
          'error',
          {
            'types':
              {
                'String': { 'message': 'Use string instead', 'fixWith': 'string' },
                'Number': { 'message': 'Use number instead', 'fixWith': 'number' },
                'Boolean': { 'message': 'Use boolean instead', 'fixWith': 'boolean' },
                'Function': { 'message': 'Use explicit type instead' },
              },
          },
        ]
      '@typescript-eslint/explicit-member-accessibility':
        [
          'error',
          {
            accessibility: 'explicit',
            overrides:
              {
                accessors: 'no-public',
                constructors: 'no-public',
                methods: 'no-public',
                properties: 'no-public',
                parameterProperties: 'explicit',
              },
          },
        ]
      '@typescript-eslint/method-signature-style': 2
      '@typescript-eslint/no-floating-promises': 2
      '@typescript-eslint/no-implied-eval': 2
      '@typescript-eslint/no-for-in-array': 2
      '@typescript-eslint/no-inferrable-types': 2
      '@typescript-eslint/no-invalid-void-type': 2
      '@typescript-eslint/no-misused-new': 2
      '@typescript-eslint/no-misused-promises': 2
      '@typescript-eslint/no-namespace': 2
      '@typescript-eslint/no-non-null-asserted-optional-chain': 2
      '@typescript-eslint/no-throw-literal': 2
      '@typescript-eslint/no-unnecessary-boolean-literal-compare': 2
      '@typescript-eslint/prefer-for-of': 2
      '@typescript-eslint/prefer-nullish-coalescing': 2
      '@typescript-eslint/switch-exhaustiveness-check': 2
      '@typescript-eslint/prefer-optional-chain': 2
      '@typescript-eslint/prefer-readonly': 2
      '@typescript-eslint/prefer-string-starts-ends-with': 0
      '@typescript-eslint/no-array-constructor': 2
      '@typescript-eslint/require-await': 2
      '@typescript-eslint/return-await': 2
      '@typescript-eslint/ban-ts-comment':
        [2, { 'ts-expect-error': false, 'ts-ignore': true, 'ts-nocheck': true, 'ts-check': false }]
      '@typescript-eslint/naming-convention':
        [
          2,
          {
            selector: 'memberLike',
            format: ['camelCase', 'PascalCase'],
            modifiers: ['private'],
            leadingUnderscore: 'forbid',
          },
        ]
      '@typescript-eslint/no-unused-vars':
        [2, { varsIgnorePattern: '^_', argsIgnorePattern: '^_', ignoreRestSiblings: true }]
      '@typescript-eslint/member-ordering':
        [
          2,
          {
            default:
              [
                'public-static-field',
                'protected-static-field',
                'private-static-field',
                'public-static-method',
                'protected-static-method',
                'private-static-method',
                'public-instance-field',
                'protected-instance-field',
                'private-instance-field',
                'public-constructor',
                'protected-constructor',
                'private-constructor',
                'public-instance-method',
                'protected-instance-method',
                'private-instance-method',
              ],
          },
        ]
      'prettier/prettier':
        [
          'error',
          { 'printWidth': 120, 'semi': true, 'trailingComma': 'all', 'singleQuote': true, 'arrowParens': 'always' },
        ]