.eslintrc.yaml

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

# Accept `window`, etc.
env:
  browser: true

# Known globals (`false`: read-only)
globals:
  define: false
  require: false
  module: false
  jQuery: false

# Custom rules (see https://eslint.org/docs/rules/ )
# 0:off, 1:warn, 2:error
rules:
  # --- Best Practices ---------------------------------------------------------
  block-scoped-var: warn
  # complexity: [warn, 20]
  # consistent-return: warn
  no-alert: error
  no-caller: error
  guard-for-in: warn
  # linebreak-style: warn
  no-else-return: warn
  # no-empty-function: warn
  no-extend-native: error
  no-eval: error
  no-floating-decimal: error
  no-implied-eval: error
  # no-invalid-this: warn
  no-labels: warn
  no-lone-blocks: warn
  no-loop-func: warn
  no-new: error
  no-new-func: warn
  no-new-wrappers: warn
  no-octal-escape: warn
  no-return-assign: warn
  no-script-url: warn
  no-self-compare: warn
  no-sequences: warn
  no-throw-literal: error
  no-unmodified-loop-condition: warn
  no-unused-expressions: error
  # Not enabled because we want to allow `self._superApply(self, args)`:
  # no-useless-call: warn
  no-useless-catch: warn
  no-useless-return: warn
  no-with: warn
  prefer-promise-reject-errors: warn
  radix: error
  # vars-on-top: warn
  wrap-iife:
    - error
    - any
  yoda: warn

  # --- Strict Mode ------------------------------------------------------------
  # strict: error

  # --- Variables --------------------------------------------------------------
  # init-declarations: ["warn", "always"]
  no-label-var: error
  # no-shadow: warn
  no-shadow-restricted-names: error
  no-undef: error
  no-undef-init: warn
  # no-undefined: warn
  no-use-before-define: error
    # - error
    # - functions: false

  # --- Stylistic Issues -------------------------------------------------------
  camelcase: error
  # Not enabled because sometimes we set `node = this`:
  # consistent-this: [warn, self]  # use `self = this`
  func-name-matching: warn
  new-cap:
      - error
      - { "capIsNewExceptionPattern": "^\\$\\.." }  # Allow `d = $.Deferred()`
  no-bitwise: error
  # no-multi-assign: warn
  no-negated-condition: warn
  no-unneeded-ternary: warn
  no-new-object: error
  one-var:  # see also no-use-before-define
    - warn
    - consecutive
  # one-var-declaration-per-line: warn

  # --- Possible Errors --------------------------------------------------------
  curly: error
  eqeqeq: ["error", "always", {"null": "ignore"}]
  no-cond-assign:
    - error
    - except-parens
  no-constant-condition:
    - error
    - { "checkLoops": false }
  no-empty:
    - error
    - {allowEmptyCatch: true}
  # no-extra-parens: [warn, all, {conditionalAssign: false }]
  no-nested-ternary: warn
  no-unused-vars:
    - error
    # Allow unused vars in catch() and if start with '_'
    - {args: none, caughtErrors: none, varsIgnorePattern: "^_" }