.eslint.base.yml

rules:
  # Best Practices (https://eslint.org/docs/rules/#best-practices)
  curly: [warn, all]
  dot-notation: [error, allowPattern: '^[a-z]+(_[a-z]+)+$']
  eqeqeq: [warn, always]
  guard-for-in: error
  no-new-func: error
  no-new-wrappers: error
  no-param-reassign: error
  no-return-assign: [warn, always]
  no-return-await: error
  no-self-compare: error
  no-sequences: error
  no-throw-literal: error
  no-unmodified-loop-condition: error
  no-unused-expressions: error
  no-useless-concat: error
  no-useless-return: error
  no-void: error
  no-with: error
  wrap-iife: [error, inside]
  yoda: [error, never, exceptRange: true]

  # Stylistic Issues (https://eslint.org/docs/rules/#stylistic-issues)
  func-style: [error, declaration, allowArrowFunctions: true]
  no-mixed-operators:
    - error
    - groups:
        - ['&', '|', '^', '~', '<<', '>>', '>>>']
        - ['==', '!=', '===', '!==', '>', '>=', '<', '<=']
        - ['&&', '||']
        - [in, instanceof]
      allowSamePrecedence: true
  no-multi-assign: error
  no-negated-condition: error
  no-new-object: error
  no-plusplus: [error, allowForLoopAfterthoughts: true]
  no-unneeded-ternary: error
  operator-assignment: [error, always]
  prefer-object-spread: error
  spaced-comment:
    - warn
    - always
    - block:
        balanced: true

  # ECMAScript 6 (https://eslint.org/docs/rules/#ecmascript-6)
  arrow-body-style: [error, as-needed]
  no-confusing-arrow: [error, allowParens: true]
  no-var: error
  prefer-const: error
  prefer-rest-params: error
  prefer-spread: error
  prefer-template: error