.eslintrc.yml

---
root: true

env:
  node: true
  jest: true
  es2017: true

parserOptions:
  sourceType: module

extends:
- eslint:recommended

reportUnusedDisableDirectives: true

overrides:
- files:
  - '*.config.js'
  parserOptions:
    # allowing the strict mode for CommonJS configs
    sourceType: script

rules:
  # redundant
  no-extra-boolean-cast: 'off'
  no-prototype-builtins: 'off'
  # text safe
  eol-last: warn
  indent: 'off'
  indent-legacy:
  - warn
  - 2
  linebreak-style: warn
  no-trailing-spaces: warn
  no-multiple-empty-lines:
  - warn
  - max: 1
    maxBOF: 0
    maxEOF: 0
  # spacing safe
  key-spacing:
  - warn
  - mode: minimum
  arrow-spacing: warn
  block-spacing: warn
  comma-spacing: warn
  keyword-spacing: warn
  space-in-parens: warn
  space-unary-ops: warn
  func-call-spacing: warn
  rest-spread-spacing: warn
  space-before-blocks: warn
  object-curly-spacing:
  - warn
  - always
  array-bracket-newline:
  - warn
  - consistent
  array-element-newline:
  - warn
  - consistent
  array-bracket-spacing: warn
  computed-property-spacing: warn
  space-before-function-paren:
  - warn
  - anonymous: never
    named: never
    asyncArrow: always
  no-whitespace-before-property: warn
  # vars safe
  prefer-const: warn
  no-var: warn
  no-unused-vars:
  - warn
  - args: all
    argsIgnorePattern: "^_"
    caughtErrors: all
    caughtErrorsIgnorePattern: "^_"
  no-unused-expressions:
  - warn
  - allowTernary: true
  # code-style safe
  semi:
  - warn
  - never
  curly:
  - warn
  - multi-line
  - consistent
  strict: warn
  eqeqeq: warn
  quotes:
  - warn
  - single
  - avoidEscape: true
  wrap-iife: warn
  brace-style: warn
  comma-style: warn
  quote-props:
  - warn
  - as-needed
  comma-dangle: warn
  dot-notation: warn
  object-shorthand: warn
  prefer-arrow-callback: warn
  no-extra-parens:
  - warn
  - functions
  no-new-wrappers: warn
  no-useless-call: warn
  no-throw-literal: warn
  no-empty-function: warn
  no-useless-escape: warn
  no-useless-rename: warn
  no-unneeded-ternary: warn
  no-useless-constructor: warn
  no-useless-computed-key: warn
  no-template-curly-in-string: warn
  no-misleading-character-class: warn
  # code-style unsafe
  new-parens: error
  guard-for-in: error
  array-callback-return: error
  no-eval: error
  no-void: error
  no-labels: error
  no-bitwise: error
  no-loop-func: error
  no-multi-str: error
  no-sequences: error
  no-lone-blocks: error
  no-implied-eval: error
  no-octal-escape: error
  no-self-compare: error
  no-useless-return: error
  no-floating-decimal: error
  no-use-before-define:
  - error
  - classes: false
    variables: false
    functions: false
  no-restricted-globals:
  - error
  - toString
  no-unmodified-loop-condition: error
  # code-style unsafe but often used during development
  no-alert: warn
  no-debugger: warn