.eslintrc.yml

parser: '@typescript-eslint/parser'

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

ignorePatterns: ['index.js']

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

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-redeclare': 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,
      },
    ]

  'import/first': 2
  'import/newline-after-import': 2

overrides:
  - files:
      - ./**/*{.ts,.tsx}
    rules:
      'no-unused-vars': [2, { varsIgnorePattern: '^_', argsIgnorePattern: '^_', ignoreRestSiblings: true }]
      # eslint will treat TS type as undefined stuff
      'no-undef': 0

      # conflict function override
      'no-dupe-class-members': 0

      '@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',
              ],
          },
        ]