Changed ESLint rule configs to use 'off', 'warn', and 'error' instead of numbers for better readability

packages/eslint-config-airbnb-base/index.js

@@ -13,6 +13,6 @@ module.exports = {
     sourceType: 'module',
   },
   rules: {
-    strict: 2,
+    strict: 'error',
   }
 };

packages/eslint-config-airbnb-base/legacy.js

@@ -16,6 +16,6 @@ module.exports = {
   ecmaFeatures: {},
   globals: {},
   rules: {
-    'comma-dangle': [2, 'never']
+    'comma-dangle': ['error', 'never']
   }
 };

packages/eslint-config-airbnb-base/rules/best-practices.js

@@ -1,61 +1,61 @@
 module.exports = {
   rules: {
     // enforces getter/setter pairs in objects
-    'accessor-pairs': 0,
+    'accessor-pairs': 'off',
 
     // enforces return statements in callbacks of array's methods
     // http://eslint.org/docs/rules/array-callback-return
-    'array-callback-return': 2,
+    'array-callback-return': 'error',
 
     // treat var statements as if they were block scoped
-    'block-scoped-var': 2,
+    'block-scoped-var': 'error',
 
     // specify the maximum cyclomatic complexity allowed in a program
-    complexity: [0, 11],
+    complexity: ['off', 11],
 
     // require return statements to either always or never specify values
-    'consistent-return': 2,
+    'consistent-return': 'error',
 
     // specify curly brace conventions for all control statements
-    curly: [2, 'multi-line'],
+    curly: ['error', 'multi-line'],
 
     // require default case in switch statements
-    'default-case': [2, { commentPattern: '^no default$' }],
+    'default-case': ['error', { commentPattern: '^no default$' }],
 
     // encourages use of dot notation whenever possible
-    'dot-notation': [2, { allowKeywords: true }],
+    'dot-notation': ['error', { allowKeywords: true }],
 
     // enforces consistent newlines before or after dots
     // http://eslint.org/docs/rules/dot-location
-    'dot-location': [2, 'property'],
+    'dot-location': ['error', 'property'],
 
     // require the use of === and !==
     // http://eslint.org/docs/rules/eqeqeq
-    eqeqeq: [2, 'allow-null'],
+    eqeqeq: ['error', 'allow-null'],
 
     // make sure for-in loops have an if statement
-    'guard-for-in': 2,
+    'guard-for-in': 'error',
 
     // disallow the use of alert, confirm, and prompt
-    'no-alert': 1,
+    'no-alert': 'warn',
 
     // disallow use of arguments.caller or arguments.callee
-    'no-caller': 2,
+    'no-caller': 'error',
 
     // disallow lexical declarations in case/default clauses
     // http://eslint.org/docs/rules/no-case-declarations.html
-    'no-case-declarations': 2,
+    'no-case-declarations': 'error',
 
     // disallow division operators explicitly at beginning of regular expression
     // http://eslint.org/docs/rules/no-div-regex
-    'no-div-regex': 0,
+    'no-div-regex': 'off',
 
     // disallow else after a return in an if
-    'no-else-return': 2,
+    'no-else-return': 'error',
 
     // disallow empty functions, except for standalone funcs/arrows
     // http://eslint.org/docs/rules/no-empty-function
-    'no-empty-function': [2, {
+    'no-empty-function': ['error', {
       allow: [
         'arrowFunctions',
         'functions',
@@ -65,37 +65,37 @@ module.exports = {
 
     // disallow empty destructuring patterns
     // http://eslint.org/docs/rules/no-empty-pattern
-    'no-empty-pattern': 2,
+    'no-empty-pattern': 'error',
 
     // disallow comparisons to null without a type-checking operator
-    'no-eq-null': 0,
+    'no-eq-null': 'off',
 
     // disallow use of eval()
-    'no-eval': 2,
+    'no-eval': 'error',
 
     // disallow adding to native types
-    'no-extend-native': 2,
+    'no-extend-native': 'error',
 
     // disallow unnecessary function binding
-    'no-extra-bind': 2,
+    'no-extra-bind': 'error',
 
     // disallow Unnecessary Labels
     // http://eslint.org/docs/rules/no-extra-label
-    'no-extra-label': 2,
+    'no-extra-label': 'error',
 
     // disallow fallthrough of case statements
-    'no-fallthrough': 2,
+    'no-fallthrough': 'error',
 
     // disallow the use of leading or trailing decimal points in numeric literals
-    'no-floating-decimal': 2,
+    'no-floating-decimal': 'error',
 
     // disallow reassignments of native objects or read-only globals
     // http://eslint.org/docs/rules/no-global-assign
-    'no-global-assign': [2, { exceptions: [] }],
+    'no-global-assign': ['error', { exceptions: [] }],
 
     // disallow implicit type conversions
     // http://eslint.org/docs/rules/no-implicit-coercion
-    'no-implicit-coercion': [0, {
+    'no-implicit-coercion': ['off', {
       boolean: false,
       number: true,
       string: true,
@@ -104,29 +104,29 @@ module.exports = {
 
     // disallow var and named functions in global scope
     // http://eslint.org/docs/rules/no-implicit-globals
-    'no-implicit-globals': 0,
+    'no-implicit-globals': 'off',
 
     // disallow use of eval()-like methods
-    'no-implied-eval': 2,
+    'no-implied-eval': 'error',
 
     // disallow this keywords outside of classes or class-like objects
-    'no-invalid-this': 0,
+    'no-invalid-this': 'off',
 
     // disallow usage of __iterator__ property
-    'no-iterator': 2,
+    'no-iterator': 'error',
 
     // disallow use of labels for anything other then loops and switches
-    'no-labels': [2, { allowLoop: false, allowSwitch: false }],
+    'no-labels': ['error', { allowLoop: false, allowSwitch: false }],
 
     // disallow unnecessary nested blocks
-    'no-lone-blocks': 2,
+    'no-lone-blocks': 'error',
 
     // disallow creation of functions within loops
-    'no-loop-func': 2,
+    'no-loop-func': 'error',
 
     // disallow magic numbers
     // http://eslint.org/docs/rules/no-magic-numbers
-    'no-magic-numbers': [0, {
+    'no-magic-numbers': ['off', {
       ignore: [],
       ignoreArrayIndexes: true,
       enforceConst: true,
@@ -134,107 +134,107 @@ module.exports = {
     }],
 
     // disallow use of multiple spaces
-    'no-multi-spaces': 2,
+    'no-multi-spaces': 'error',
 
     // disallow use of multiline strings
-    'no-multi-str': 2,
+    'no-multi-str': 'error',
 
     // disallow reassignments of native objects
     // TODO: deprecated in favor of no-global-assign
-    'no-native-reassign': 0,
+    'no-native-reassign': 'off',
 
     // disallow use of new operator when not part of the assignment or comparison
-    'no-new': 2,
+    'no-new': 'error',
 
     // disallow use of new operator for Function object
-    'no-new-func': 2,
+    'no-new-func': 'error',
 
     // disallows creating new instances of String, Number, and Boolean
-    'no-new-wrappers': 2,
+    'no-new-wrappers': 'error',
 
     // disallow use of (old style) octal literals
-    'no-octal': 2,
+    'no-octal': 'error',
 
     // disallow use of octal escape sequences in string literals, such as
     // var foo = 'Copyright \251';
-    'no-octal-escape': 2,
+    'no-octal-escape': 'error',
 
     // disallow reassignment of function parameters
     // disallow parameter object manipulation
     // rule: http://eslint.org/docs/rules/no-param-reassign.html
-    'no-param-reassign': [2, { props: true }],
+    'no-param-reassign': ['error', { props: true }],
 
     // disallow usage of __proto__ property
-    'no-proto': 2,
+    'no-proto': 'error',
 
     // disallow declaring the same variable more then once
-    'no-redeclare': 2,
+    'no-redeclare': 'error',
 
     // disallow use of assignment in return statement
-    'no-return-assign': 2,
+    'no-return-assign': 'error',
 
     // disallow use of `javascript:` urls.
-    'no-script-url': 2,
+    'no-script-url': 'error',
 
     // disallow self assignment
     // http://eslint.org/docs/rules/no-self-assign
-    'no-self-assign': 2,
+    'no-self-assign': 'error',
 
     // disallow comparisons where both sides are exactly the same
-    'no-self-compare': 2,
+    'no-self-compare': 'error',
 
     // disallow use of comma operator
-    'no-sequences': 2,
+    'no-sequences': 'error',
 
     // restrict what can be thrown as an exception
-    'no-throw-literal': 2,
+    'no-throw-literal': 'error',
 
     // disallow unmodified conditions of loops
     // http://eslint.org/docs/rules/no-unmodified-loop-condition
-    'no-unmodified-loop-condition': 0,
+    'no-unmodified-loop-condition': 'off',
 
     // disallow usage of expressions in statement position
-    'no-unused-expressions': [2, {
+    'no-unused-expressions': ['error', {
       allowShortCircuit: false,
       allowTernary: false,
     }],
 
     // disallow unused labels
     // http://eslint.org/docs/rules/no-unused-labels
-    'no-unused-labels': 2,
+    'no-unused-labels': 'error',
 
     // disallow unnecessary .call() and .apply()
-    'no-useless-call': 0,
+    'no-useless-call': 'off',
 
     // disallow useless string concatenation
     // http://eslint.org/docs/rules/no-useless-concat
-    'no-useless-concat': 2,
+    'no-useless-concat': 'error',
 
     // disallow unnecessary string escaping
     // http://eslint.org/docs/rules/no-useless-escape
-    'no-useless-escape': 2,
+    'no-useless-escape': 'error',
 
     // disallow use of void operator
     // http://eslint.org/docs/rules/no-void
-    'no-void': 2,
+    'no-void': 'error',
 
     // disallow usage of configurable warning terms in comments: e.g. todo
-    'no-warning-comments': [0, { terms: ['todo', 'fixme', 'xxx'], location: 'start' }],
+    'no-warning-comments': ['off', { terms: ['todo', 'fixme', 'xxx'], location: 'start' }],
 
     // disallow use of the with statement
-    'no-with': 2,
+    'no-with': 'error',
 
     // require use of the second argument for parseInt()
-    radix: 2,
+    radix: 'error',
 
     // requires to declare all vars on top of their containing scope
-    'vars-on-top': 2,
+    'vars-on-top': 'error',
 
     // require immediate function invocation to be wrapped in parentheses
     // http://eslint.org/docs/rules/wrap-iife.html
-    'wrap-iife': [2, 'outside'],
+    'wrap-iife': ['error', 'outside'],
 
     // require or disallow Yoda conditions
-    yoda: 2
+    yoda: 'error'
   }
 };

packages/eslint-config-airbnb-base/rules/errors.js

@@ -1,113 +1,113 @@
 module.exports = {
   rules: {
     // require trailing commas in multiline object literals
-    'comma-dangle': [2, 'always-multiline'],
+    'comma-dangle': ['error', 'always-multiline'],
 
     // disallow assignment in conditional expressions
-    'no-cond-assign': [2, 'always'],
+    'no-cond-assign': ['error', 'always'],
 
     // disallow use of console
-    'no-console': 1,
+    'no-console': 'warn',
 
     // disallow use of constant expressions in conditions
-    'no-constant-condition': 1,
+    'no-constant-condition': 'warn',
 
     // disallow control characters in regular expressions
-    'no-control-regex': 2,
+    'no-control-regex': 'error',
 
     // disallow use of debugger
-    'no-debugger': 2,
+    'no-debugger': 'error',
 
     // disallow duplicate arguments in functions
-    'no-dupe-args': 2,
+    'no-dupe-args': 'error',
 
     // disallow duplicate keys when creating object literals
-    'no-dupe-keys': 2,
+    'no-dupe-keys': 'error',
 
     // disallow a duplicate case label.
-    'no-duplicate-case': 2,
+    'no-duplicate-case': 'error',
 
     // disallow empty statements
-    'no-empty': 2,
+    'no-empty': 'error',
 
     // disallow the use of empty character classes in regular expressions
-    'no-empty-character-class': 2,
+    'no-empty-character-class': 'error',
 
     // disallow assigning to the exception in a catch block
-    'no-ex-assign': 2,
+    'no-ex-assign': 'error',
 
     // disallow double-negation boolean casts in a boolean context
     // http://eslint.org/docs/rules/no-extra-boolean-cast
-    'no-extra-boolean-cast': 2,
+    'no-extra-boolean-cast': 'error',
 
     // disallow unnecessary parentheses
     // http://eslint.org/docs/rules/no-extra-parens
-    'no-extra-parens': [0, 'all', {
+    'no-extra-parens': ['off', 'all', {
       conditionalAssign: true,
       nestedBinaryExpressions: false,
       returnAssign: false,
     }],
 
     // disallow unnecessary semicolons
-    'no-extra-semi': 2,
+    'no-extra-semi': 'error',
 
     // disallow overwriting functions written as function declarations
-    'no-func-assign': 2,
+    'no-func-assign': 'error',
 
     // disallow function or variable declarations in nested blocks
-    'no-inner-declarations': 2,
+    'no-inner-declarations': 'error',
 
     // disallow invalid regular expression strings in the RegExp constructor
-    'no-invalid-regexp': 2,
+    'no-invalid-regexp': 'error',
 
     // disallow irregular whitespace outside of strings and comments
-    'no-irregular-whitespace': 2,
+    'no-irregular-whitespace': 'error',
 
     // disallow negation of the left operand of an in expression
     // TODO: deprecated in favor of no-unsafe-negation
-    'no-negated-in-lhs': 0,
+    'no-negated-in-lhs': 'off',
 
     // disallow the use of object properties of the global object (Math and JSON) as functions
-    'no-obj-calls': 2,
+    'no-obj-calls': 'error',
 
     // disallow use of Object.prototypes builtins directly
     // http://eslint.org/docs/rules/no-prototype-builtins
-    'no-prototype-builtins': 2,
+    'no-prototype-builtins': 'error',
 
     // disallow multiple spaces in a regular expression literal
-    'no-regex-spaces': 2,
+    'no-regex-spaces': 'error',
 
     // disallow sparse arrays
-    'no-sparse-arrays': 2,
+    'no-sparse-arrays': 'error',
 
     // Disallow template literal placeholder syntax in regular strings
     // http://eslint.org/docs/rules/no-template-curly-in-string
     // TODO: enable, semver-major
-    'no-template-curly-in-string': 0,
+    'no-template-curly-in-string': 'off',
 
     // Avoid code that looks like two expressions but is actually one
     // http://eslint.org/docs/rules/no-unexpected-multiline
-    'no-unexpected-multiline': 2,
+    'no-unexpected-multiline': 'error',
 
     // disallow unreachable statements after a return, throw, continue, or break statement
-    'no-unreachable': 2,
+    'no-unreachable': 'error',
 
     // disallow return/throw/break/continue inside finally blocks
     // http://eslint.org/docs/rules/no-unsafe-finally
-    'no-unsafe-finally': 2,
+    'no-unsafe-finally': 'error',
 
     // disallow negating the left operand of relational operators
     // http://eslint.org/docs/rules/no-unsafe-negation
-    'no-unsafe-negation': 2,
+    'no-unsafe-negation': 'error',
 
     // disallow comparisons with the value NaN
-    'use-isnan': 2,
+    'use-isnan': 'error',
 
     // ensure JSDoc comments are valid
     // http://eslint.org/docs/rules/valid-jsdoc
-    'valid-jsdoc': 0,
+    'valid-jsdoc': 'off',
 
     // ensure that the results of typeof are compared against a valid string
-    'valid-typeof': 2
+    'valid-typeof': 'error'
   }
 };

packages/eslint-config-airbnb-base/rules/es6.js

@@ -14,89 +14,89 @@ module.exports = {
   rules: {
     // enforces no braces where they can be omitted
     // http://eslint.org/docs/rules/arrow-body-style
-    'arrow-body-style': [2, 'as-needed'],
+    'arrow-body-style': ['error', 'as-needed'],
 
     // require parens in arrow function arguments
-    'arrow-parens': 0,
+    'arrow-parens': 'off',
 
     // require space before/after arrow function's arrow
     // http://eslint.org/docs/rules/arrow-spacing
-    'arrow-spacing': [2, { before: true, after: true }],
+    'arrow-spacing': ['error', { before: true, after: true }],
 
     // verify super() callings in constructors
-    'constructor-super': 2,
+    'constructor-super': 'error',
 
     // enforce the spacing around the * in generator functions
     // http://eslint.org/docs/rules/generator-star-spacing
-    'generator-star-spacing': [2, { before: false, after: true }],
+    'generator-star-spacing': ['error', { before: false, after: true }],
 
     // disallow modifying variables of class declarations
     // http://eslint.org/docs/rules/no-class-assign
-    'no-class-assign': 2,
+    'no-class-assign': 'error',
 
     // disallow arrow functions where they could be confused with comparisons
     // http://eslint.org/docs/rules/no-confusing-arrow
-    'no-confusing-arrow': [2, {
+    'no-confusing-arrow': ['error', {
       allowParens: true,
     }],
 
     // disallow modifying variables that are declared using const
-    'no-const-assign': 2,
+    'no-const-assign': 'error',
 
     // disallow duplicate class members
     // http://eslint.org/docs/rules/no-dupe-class-members
-    'no-dupe-class-members': 2,
+    'no-dupe-class-members': 'error',
 
     // disallow importing from the same path more than once
     // http://eslint.org/docs/rules/no-duplicate-imports
-    'no-duplicate-imports': 2,
+    'no-duplicate-imports': 'error',
 
     // disallow symbol constructor
     // http://eslint.org/docs/rules/no-new-symbol
-    'no-new-symbol': 2,
+    'no-new-symbol': 'error',
 
     // disallow specific imports
     // http://eslint.org/docs/rules/no-restricted-imports
-    'no-restricted-imports': 0,
+    'no-restricted-imports': 'off',
 
     // disallow to use this/super before super() calling in constructors.
     // http://eslint.org/docs/rules/no-this-before-super
-    'no-this-before-super': 2,
+    'no-this-before-super': 'error',
 
     // disallow useless computed property keys
     // http://eslint.org/docs/rules/no-useless-computed-key
-    'no-useless-computed-key': 2,
+    'no-useless-computed-key': 'error',
 
     // disallow unnecessary constructor
     // http://eslint.org/docs/rules/no-useless-constructor
-    'no-useless-constructor': 2,
+    'no-useless-constructor': 'error',
 
     // disallow renaming import, export, and destructured assignments to the same name
     // http://eslint.org/docs/rules/no-useless-rename
-    'no-useless-rename': [2, {
+    'no-useless-rename': ['error', {
       ignoreDestructuring: false,
       ignoreImport: false,
       ignoreExport: false,
     }],
 
     // require let or const instead of var
-    'no-var': 2,
+    'no-var': 'error',
 
     // require method and property shorthand syntax for object literals
     // http://eslint.org/docs/rules/object-shorthand
-    'object-shorthand': [2, 'always', {
+    'object-shorthand': ['error', 'always', {
       ignoreConstructors: false,
       avoidQuotes: true,
     }],
 
     // suggest using arrow functions as callbacks
-    'prefer-arrow-callback': [2, {
+    'prefer-arrow-callback': ['error', {
       allowNamedFunctions: false,
       allowUnboundThis: true,
     }],
 
     // suggest using of const declaration for variables that are never modified after declared
-    'prefer-const': [2, {
+    'prefer-const': ['error', {
       destructuring: 'any',
       ignoreReadBeforeAssign: true,
     }],
@@ -104,31 +104,31 @@ module.exports = {
     // suggest using Reflect methods where applicable
     // http://eslint.org/docs/rules/prefer-reflect
     // TODO: enable
-    'prefer-reflect': 0,
+    'prefer-reflect': 'off',
 
     // use rest parameters instead of arguments
     // http://eslint.org/docs/rules/prefer-rest-params
-    'prefer-rest-params': 2,
+    'prefer-rest-params': 'error',
 
     // suggest using the spread operator instead of .apply()
     // http://eslint.org/docs/rules/prefer-spread
-    'prefer-spread': 2,
+    'prefer-spread': 'error',
 
     // suggest using template literals instead of string concatenation
     // http://eslint.org/docs/rules/prefer-template
-    'prefer-template': 2,
+    'prefer-template': 'error',
 
     // disallow generator functions that do not have yield
     // http://eslint.org/docs/rules/require-yield
-    'require-yield': 2,
+    'require-yield': 'error',
 
     // enforce spacing between object rest-spread
     // http://eslint.org/docs/rules/rest-spread-spacing
-    'rest-spread-spacing': [2, 'never'],
+    'rest-spread-spacing': ['error', 'never'],
 
     // import sorting
     // http://eslint.org/docs/rules/sort-imports
-    'sort-imports': [0, {
+    'sort-imports': ['off', {
       ignoreCase: false,
       ignoreMemberSort: false,
       memberSyntaxSortOrder: ['none', 'all', 'multiple', 'single'],
@@ -136,10 +136,10 @@ module.exports = {
 
     // enforce usage of spacing in template strings
     // http://eslint.org/docs/rules/template-curly-spacing
-    'template-curly-spacing': 2,
+    'template-curly-spacing': 'error',
 
     // enforce spacing around the * in yield* expressions
     // http://eslint.org/docs/rules/yield-star-spacing
-    'yield-star-spacing': [2, 'after']
+    'yield-star-spacing': ['error', 'after']
   }
 };

packages/eslint-config-airbnb-base/rules/imports.js

@@ -33,101 +33,101 @@ module.exports = {
 
     // ensure imports point to files/modules that can be resolved
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-unresolved.md
-    'import/no-unresolved': [2, { commonjs: true }],
+    'import/no-unresolved': ['error', { commonjs: true }],
 
     // ensure named imports coupled with named exports
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/named.md#when-not-to-use-it
-    'import/named': 0,
+    'import/named': 'off',
 
     // ensure default import coupled with default export
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/default.md#when-not-to-use-it
-    'import/default': 0,
+    'import/default': 'off',
 
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/namespace.md
-    'import/namespace': 0,
+    'import/namespace': 'off',
 
     // Helpful warnings:
 
     // disallow invalid exports, e.g. multiple defaults
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/export.md
-    'import/export': 2,
+    'import/export': 'error',
 
     // do not allow a default import name to match a named export
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-named-as-default.md
-    'import/no-named-as-default': 2,
+    'import/no-named-as-default': 'error',
 
     // warn on accessing default export property names that are also named exports
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-named-as-default-member.md
-    'import/no-named-as-default-member': 2,
+    'import/no-named-as-default-member': 'error',
 
     // disallow use of jsdoc-marked-deprecated imports
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-deprecated.md
-    'import/no-deprecated': 0,
+    'import/no-deprecated': 'off',
 
     // Forbid the use of extraneous packages
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-extraneous-dependencies.md
-    'import/no-extraneous-dependencies': [2, {
+    'import/no-extraneous-dependencies': ['error', {
       devDependencies: false,
       optionalDependencies: false,
     }],
 
     // Forbid mutable exports
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-mutable-exports.md
-    'import/no-mutable-exports': 2,
+    'import/no-mutable-exports': 'error',
 
     // Module systems:
 
     // disallow require()
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-commonjs.md
-    'import/no-commonjs': 0,
+    'import/no-commonjs': 'off',
 
     // disallow AMD require/define
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-amd.md
-    'import/no-amd': 2,
+    'import/no-amd': 'error',
 
     // No Node.js builtin modules
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-nodejs-modules.md
     // TODO: enable?
-    'import/no-nodejs-modules': 0,
+    'import/no-nodejs-modules': 'off',
 
     // Style guide:
 
     // disallow non-import statements appearing before import statements
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/imports-first.md
-    'import/imports-first': [2, 'absolute-first'],
+    'import/imports-first': ['error', 'absolute-first'],
 
     // disallow duplicate imports
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-duplicates.md
-    'import/no-duplicates': 2,
+    'import/no-duplicates': 'error',
 
     // disallow namespace imports
     // TODO: enable?
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-namespace.md
-    'import/no-namespace': 0,
+    'import/no-namespace': 'off',
 
     // Ensure consistent use of file extension within the import path
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/extensions.md
     // TODO: enable when https://github.com/benmosher/eslint-plugin-import/issues/390 is resolved
-    'import/extensions': [0, 'never'],
+    'import/extensions': ['off', 'never'],
 
     // Enforce a convention in module import order
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/order.md
     // TODO: enable?
-    'import/order': [0, {
+    'import/order': ['off', {
       groups: ['builtin', 'external', 'internal', 'parent', 'sibling', 'index'],
       'newlines-between': 'never',
     }],
 
     // Require a newline after the last import/require in a group
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/newline-after-import.md
-    'import/newline-after-import': 2,
+    'import/newline-after-import': 'error',
 
     // Require modules with a single export to use a default export
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/prefer-default-export.md
-    'import/prefer-default-export': 2,
+    'import/prefer-default-export': 'error',
 
     // Restrict which files can be imported in a given folder
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-restricted-paths.md
-    'import/no-restricted-paths': 0,
+    'import/no-restricted-paths': 'off',
   },
 };

packages/eslint-config-airbnb-base/rules/node.js

@@ -5,35 +5,35 @@ module.exports = {
 
   rules: {
     // enforce return after a callback
-    'callback-return': 0,
+    'callback-return': 'off',
 
     // require all requires be top-level
     // http://eslint.org/docs/rules/global-require
-    'global-require': 2,
+    'global-require': 'error',
 
     // enforces error handling in callbacks (node environment)
-    'handle-callback-err': 0,
+    'handle-callback-err': 'off',
 
     // disallow mixing regular variable and require declarations
-    'no-mixed-requires': [0, false],
+    'no-mixed-requires': ['off', false],
 
     // disallow use of new operator with the require function
-    'no-new-require': 2,
+    'no-new-require': 'error',
 
     // disallow string concatenation with __dirname and __filename
     // http://eslint.org/docs/rules/no-path-concat
-    'no-path-concat': 2,
+    'no-path-concat': 'error',
 
     // disallow use of process.env
-    'no-process-env': 0,
+    'no-process-env': 'off',
 
     // disallow process.exit()
-    'no-process-exit': 0,
+    'no-process-exit': 'off',
 
     // restrict usage of specified node modules
-    'no-restricted-modules': 0,
+    'no-restricted-modules': 'off',
 
     // disallow use of synchronous methods (off by default)
-    'no-sync': 0,
+    'no-sync': 'off',
   }
 };

packages/eslint-config-airbnb-base/rules/strict.js

@@ -1,6 +1,6 @@
 module.exports = {
   rules: {
     // babel inserts `'use strict';` for us
-    strict: [2, 'never']
+    strict: ['error', 'never']
   }
 };

packages/eslint-config-airbnb-base/rules/style.js

@@ -1,68 +1,68 @@
 module.exports = {
   rules: {
     // enforce spacing inside array brackets
-    'array-bracket-spacing': [2, 'never'],
+    'array-bracket-spacing': ['error', 'never'],
 
     // enforce spacing inside single-line blocks
     // http://eslint.org/docs/rules/block-spacing
-    'block-spacing': [2, 'always'],
+    'block-spacing': ['error', 'always'],
 
     // enforce one true brace style
-    'brace-style': [2, '1tbs', { allowSingleLine: true }],
+    'brace-style': ['error', '1tbs', { allowSingleLine: true }],
 
     // require camel case names
-    camelcase: [2, { properties: 'never' }],
+    camelcase: ['error', { properties: 'never' }],
 
     // enforce spacing before and after comma
-    'comma-spacing': [2, { before: false, after: true }],
+    'comma-spacing': ['error', { before: false, after: true }],
 
     // enforce one true comma style
-    'comma-style': [2, 'last'],
+    'comma-style': ['error', 'last'],
 
     // disallow padding inside computed properties
-    'computed-property-spacing': [2, 'never'],
+    'computed-property-spacing': ['error', 'never'],
 
     // enforces consistent naming when capturing the current execution context
-    'consistent-this': 0,
+    'consistent-this': 'off',
 
     // enforce newline at the end of file, with no multiple empty lines
-    'eol-last': 2,
+    'eol-last': 'error',
 
     // enforce spacing between functions and their invocations
     // http://eslint.org/docs/rules/func-call-spacing
     // TODO: enable, semver-minor
-    'func-call-spacing': [0, 'never'],
+    'func-call-spacing': ['off', 'never'],
 
     // require function expressions to have a name
-    'func-names': 1,
+    'func-names': 'warn',
 
     // enforces use of function declarations or expressions
-    'func-style': 0,
+    'func-style': 'off',
 
     // Blacklist certain identifiers to prevent them being used
     // http://eslint.org/docs/rules/id-blacklist
-    'id-blacklist': 0,
+    'id-blacklist': 'off',
 
     // this option enforces minimum and maximum identifier lengths
     // (variable names, property names etc.)
-    'id-length': 0,
+    'id-length': 'off',
 
     // require identifiers to match the provided regular expression
-    'id-match': 0,
+    'id-match': 'off',
 
     // this option sets a specific tab width for your code
     // http://eslint.org/docs/rules/indent
-    indent: [2, 2, { SwitchCase: 1, VariableDeclarator: 1, outerIIFEBody: 1 }],
+    indent: ['error', 2, { SwitchCase: 1, VariableDeclarator: 1, outerIIFEBody: 1 }],
 
     // specify whether double or single quotes should be used in JSX attributes
     // http://eslint.org/docs/rules/jsx-quotes
-    'jsx-quotes': [0, 'prefer-double'],
+    'jsx-quotes': ['off', 'prefer-double'],
 
     // enforces spacing between keys and values in object literal properties
-    'key-spacing': [2, { beforeColon: false, afterColon: true }],
+    'key-spacing': ['error', { beforeColon: false, afterColon: true }],
 
     // require a space before & after certain keywords
-    'keyword-spacing': [2, {
+    'keyword-spacing': ['error', {
       before: true,
       after: true,
       overrides: {
@@ -74,86 +74,86 @@ module.exports = {
 
     // disallow mixed 'LF' and 'CRLF' as linebreaks
     // http://eslint.org/docs/rules/linebreak-style
-    'linebreak-style': [2, 'unix'],
+    'linebreak-style': ['error', 'unix'],
 
     // enforces empty lines around comments
-    'lines-around-comment': 0,
+    'lines-around-comment': 'off',
 
     // specify the maximum depth that blocks can be nested
-    'max-depth': [0, 4],
+    'max-depth': ['off', 4],
 
     // specify the maximum length of a line in your program
     // http://eslint.org/docs/rules/max-len
-    'max-len': [2, 100, 2, {
+    'max-len': ['error', 100, 2, {
       ignoreUrls: true,
       ignoreComments: false
     }],
 
     // specify the max number of lines in a file
     // http://eslint.org/docs/rules/max-lines
-    'max-lines': [0, {
+    'max-lines': ['off', {
       max: 300,
       skipBlankLines: true,
       skipComments: true
     }],
 
     // specify the maximum depth callbacks can be nested
-    'max-nested-callbacks': 0,
+    'max-nested-callbacks': 'off',
 
     // limits the number of parameters that can be used in the function declaration.
-    'max-params': [0, 3],
+    'max-params': ['off', 3],
 
     // specify the maximum number of statement allowed in a function
-    'max-statements': [0, 10],
+    'max-statements': ['off', 10],
 
     // restrict the number of statements per line
     // http://eslint.org/docs/rules/max-statements-per-line
-    'max-statements-per-line': [0, { max: 1 }],
+    'max-statements-per-line': ['off', { max: 1 }],
 
     // require multiline ternary
     // http://eslint.org/docs/rules/multiline-ternary
-    'multiline-ternary': 0,
+    'multiline-ternary': 'off',
 
     // require a capital letter for constructors
-    'new-cap': [2, { newIsCap: true }],
+    'new-cap': ['error', { newIsCap: true }],
 
     // disallow the omission of parentheses when invoking a constructor with no arguments
     // http://eslint.org/docs/rules/new-parens
-    'new-parens': 2,
+    'new-parens': 'error',
 
     // allow/disallow an empty newline after var statement
-    'newline-after-var': 0,
+    'newline-after-var': 'off',
 
     // http://eslint.org/docs/rules/newline-before-return
-    'newline-before-return': 0,
+    'newline-before-return': 'off',
 
     // enforces new line after each method call in the chain to make it
     // more readable and easy to maintain
     // http://eslint.org/docs/rules/newline-per-chained-call
-    'newline-per-chained-call': [2, { ignoreChainWithDepth: 4 }],
+    'newline-per-chained-call': ['error', { ignoreChainWithDepth: 4 }],
 
     // disallow use of the Array constructor
-    'no-array-constructor': 2,
+    'no-array-constructor': 'error',
 
     // disallow use of bitwise operators
     // http://eslint.org/docs/rules/no-bitwise
     // TODO: enable
-    'no-bitwise': 0,
+    'no-bitwise': 'off',
 
     // disallow use of the continue statement
     // http://eslint.org/docs/rules/no-continue
-    'no-continue': 2,
+    'no-continue': 'error',
 
     // disallow comments inline after code
-    'no-inline-comments': 0,
+    'no-inline-comments': 'off',
 
     // disallow if as the only statement in an else block
     // http://eslint.org/docs/rules/no-lonely-if
-    'no-lonely-if': 2,
+    'no-lonely-if': 'error',
 
     // disallow un-paren'd mixes of different operators
     // http://eslint.org/docs/rules/no-mixed-operators
-    'no-mixed-operators': [2, {
+    'no-mixed-operators': ['error', {
       groups: [
         ['+', '-', '*', '/', '%', '**'],
         ['&', '|', '^', '~', '<<', '>>', '>>>'],
@@ -165,28 +165,28 @@ module.exports = {
     }],
 
     // disallow mixed spaces and tabs for indentation
-    'no-mixed-spaces-and-tabs': 2,
+    'no-mixed-spaces-and-tabs': 'error',
 
     // disallow multiple empty lines and only one newline at the end
-    'no-multiple-empty-lines': [2, { max: 2, maxEOF: 1 }],
+    'no-multiple-empty-lines': ['error', { max: 2, maxEOF: 1 }],
 
     // disallow negated conditions
     // http://eslint.org/docs/rules/no-negated-condition
-    'no-negated-condition': 0,
+    'no-negated-condition': 'off',
 
     // disallow nested ternary expressions
-    'no-nested-ternary': 2,
+    'no-nested-ternary': 'error',
 
     // disallow use of the Object constructor
-    'no-new-object': 2,
+    'no-new-object': 'error',
 
     // disallow use of unary operators, ++ and --
-    'no-plusplus': 0,
+    'no-plusplus': 'off',
 
     // disallow certain syntax forms
     // http://eslint.org/docs/rules/no-restricted-syntax
     'no-restricted-syntax': [
-      2,
+      'error',
       'DebuggerStatement',
       'ForInStatement',
       'LabeledStatement',
@@ -194,103 +194,103 @@ module.exports = {
     ],
 
     // disallow space between function identifier and application
-    'no-spaced-func': 2,
+    'no-spaced-func': 'error',
 
     // disallow tab characters entirely
     // TODO: enable
-    'no-tabs': 0,
+    'no-tabs': 'off',
 
     // disallow the use of ternary operators
-    'no-ternary': 0,
+    'no-ternary': 'off',
 
     // disallow trailing whitespace at the end of lines
-    'no-trailing-spaces': 2,
+    'no-trailing-spaces': 'error',
 
     // disallow dangling underscores in identifiers
-    'no-underscore-dangle': [2, { allowAfterThis: false }],
+    'no-underscore-dangle': ['error', { allowAfterThis: false }],
 
     // disallow the use of Boolean literals in conditional expressions
     // also, prefer `a || b` over `a ? a : b`
     // http://eslint.org/docs/rules/no-unneeded-ternary
-    'no-unneeded-ternary': [2, { defaultAssignment: false }],
+    'no-unneeded-ternary': ['error', { defaultAssignment: false }],
 
     // disallow whitespace before properties
     // http://eslint.org/docs/rules/no-whitespace-before-property
-    'no-whitespace-before-property': 2,
+    'no-whitespace-before-property': 'error',
 
     // require padding inside curly braces
-    'object-curly-spacing': [2, 'always'],
+    'object-curly-spacing': ['error', 'always'],
 
     // enforce line breaks between braces
     // http://eslint.org/docs/rules/object-curly-newline
     // TODO: enable once https://github.com/eslint/eslint/issues/6488 is resolved
-    'object-curly-newline': [0, {
+    'object-curly-newline': ['off', {
       ObjectExpression: { minProperties: 0, multiline: true },
       ObjectPattern: { minProperties: 0, multiline: true }
     }],
 
     // enforce "same line" or "multiple line" on object properties.
     // http://eslint.org/docs/rules/object-property-newline
-    'object-property-newline': [2, {
+    'object-property-newline': ['error', {
       allowMultiplePropertiesPerLine: true,
     }],
 
     // allow just one var statement per function
-    'one-var': [2, 'never'],
+    'one-var': ['error', 'never'],
 
     // require a newline around variable declaration
     // http://eslint.org/docs/rules/one-var-declaration-per-line
-    'one-var-declaration-per-line': [2, 'always'],
+    'one-var-declaration-per-line': ['error', 'always'],
 
     // require assignment operator shorthand where possible or prohibit it entirely
     // http://eslint.org/docs/rules/operator-assignment
-    'operator-assignment': [2, 'always'],
+    'operator-assignment': ['error', 'always'],
 
     // enforce operators to be placed before or after line breaks
-    'operator-linebreak': 0,
+    'operator-linebreak': 'off',
 
     // enforce padding within blocks
-    'padded-blocks': [2, 'never'],
+    'padded-blocks': ['error', 'never'],
 
     // require quotes around object literal property names
     // http://eslint.org/docs/rules/quote-props.html
-    'quote-props': [2, 'as-needed', { keywords: false, unnecessary: true, numbers: false }],
+    'quote-props': ['error', 'as-needed', { keywords: false, unnecessary: true, numbers: false }],
 
     // specify whether double or single quotes should be used
-    quotes: [2, 'single', { avoidEscape: true }],
+    quotes: ['error', 'single', { avoidEscape: true }],
 
     // do not require jsdoc
     // http://eslint.org/docs/rules/require-jsdoc
-    'require-jsdoc': 0,
+    'require-jsdoc': 'off',
 
     // require or disallow use of semicolons instead of ASI
-    semi: [2, 'always'],
+    semi: ['error', 'always'],
 
     // enforce spacing before and after semicolons
-    'semi-spacing': [2, { before: false, after: true }],
+    'semi-spacing': ['error', { before: false, after: true }],
 
     // requires object keys to be sorted
-    'sort-keys': [0, 'asc', { caseSensitive: false, natural: true }],
+    'sort-keys': ['off', 'asc', { caseSensitive: false, natural: true }],
 
     // sort variables within the same declaration block
-    'sort-vars': 0,
+    'sort-vars': 'off',
 
     // require or disallow space before blocks
-    'space-before-blocks': 2,
+    'space-before-blocks': 'error',
 
     // require or disallow space before function opening parenthesis
     // http://eslint.org/docs/rules/space-before-function-paren
-    'space-before-function-paren': [2, { anonymous: 'always', named: 'never' }],
+    'space-before-function-paren': ['error', { anonymous: 'always', named: 'never' }],
 
     // require or disallow spaces inside parentheses
-    'space-in-parens': [2, 'never'],
+    'space-in-parens': ['error', 'never'],
 
     // require spaces around operators
-    'space-infix-ops': 2,
+    'space-infix-ops': 'error',
 
     // Require or disallow spaces before/after unary operators
     // http://eslint.org/docs/rules/space-unary-ops
-    'space-unary-ops': [2, {
+    'space-unary-ops': ['error', {
       words: true,
       nonwords: false,
       overrides: {
@@ -298,16 +298,16 @@ module.exports = {
     }],
 
     // require or disallow a space immediately following the // or /* in a comment
-    'spaced-comment': [2, 'always', {
+    'spaced-comment': ['error', 'always', {
       exceptions: ['-', '+'],
       markers: ['=', '!']           // space here to support sprockets directives
     }],
 
     // require or disallow the Unicode Byte Order Mark
     // http://eslint.org/docs/rules/unicode-bom
-    'unicode-bom': [2, 'never'],
+    'unicode-bom': ['error', 'never'],
 
     // require regex literals to be wrapped in parentheses
-    'wrap-regex': 0
+    'wrap-regex': 'off'
   }
 };

packages/eslint-config-airbnb-base/rules/variables.js

@@ -1,41 +1,41 @@
 module.exports = {
   rules: {
     // enforce or disallow variable initializations at definition
-    'init-declarations': 0,
+    'init-declarations': 'off',
 
     // disallow the catch clause parameter name being the same as a variable in the outer scope
-    'no-catch-shadow': 0,
+    'no-catch-shadow': 'off',
 
     // disallow deletion of variables
-    'no-delete-var': 2,
+    'no-delete-var': 'error',
 
     // disallow labels that share a name with a variable
     // http://eslint.org/docs/rules/no-label-var
-    'no-label-var': 2,
+    'no-label-var': 'error',
 
     // disallow specific globals
-    'no-restricted-globals': 0,
+    'no-restricted-globals': 'off',
 
     // disallow declaration of variables already declared in the outer scope
-    'no-shadow': 2,
+    'no-shadow': 'error',
 
     // disallow shadowing of names such as arguments
-    'no-shadow-restricted-names': 2,
+    'no-shadow-restricted-names': 'error',
 
     // disallow use of undeclared variables unless mentioned in a /*global */ block
-    'no-undef': 2,
+    'no-undef': 'error',
 
     // disallow use of undefined when initializing variables
-    'no-undef-init': 2,
+    'no-undef-init': 'error',
 
     // disallow use of undefined variable
     // TODO: enable?
-    'no-undefined': 0,
+    'no-undefined': 'off',
 
     // disallow declaration of variables that are not used in the code
-    'no-unused-vars': [2, { vars: 'local', args: 'after-used' }],
+    'no-unused-vars': ['error', { vars: 'local', args: 'after-used' }],
 
     // disallow use of variables before they are defined
-    'no-use-before-define': 2
+    'no-use-before-define': 'error'
   }
 };

packages/eslint-config-airbnb/rules/react-a11y.js

@@ -10,96 +10,96 @@ module.exports = {
     // Enforce that anchors have content
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/anchor-has-content.md
     // TODO: enable, semver-major
-    'jsx-a11y/anchor-has-content': [0, ['']],
+    'jsx-a11y/anchor-has-content': ['off', ['']],
 
     // Require ARIA roles to be valid and non-abstract
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/aria-role.md
-    'jsx-a11y/aria-role': 2,
+    'jsx-a11y/aria-role': 'error',
 
     // Enforce all aria-* props are valid.
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/aria-props.md
-    'jsx-a11y/aria-props': 2,
+    'jsx-a11y/aria-props': 'error',
 
     // Enforce ARIA state and property values are valid.
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/aria-proptypes.md
-    'jsx-a11y/aria-proptypes': 2,
+    'jsx-a11y/aria-proptypes': 'error',
 
     // Enforce that elements that do not support ARIA roles, states, and
     // properties do not have those attributes.
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/aria-unsupported-elements.md
-    'jsx-a11y/aria-unsupported-elements': 2,
+    'jsx-a11y/aria-unsupported-elements': 'error',
 
     // disallow href "#"
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/href-no-hash.md
-    'jsx-a11y/href-no-hash': [2, ['a']],
+    'jsx-a11y/href-no-hash': ['error', ['a']],
 
     // Require <img> to have a non-empty `alt` prop, or role="presentation"
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/img-has-alt.md
-    'jsx-a11y/img-has-alt': 2,
+    'jsx-a11y/img-has-alt': 'error',
 
     // Prevent img alt text from containing redundant words like "image", "picture", or "photo"
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/img-redundant-alt.md
-    'jsx-a11y/img-redundant-alt': 2,
+    'jsx-a11y/img-redundant-alt': 'error',
 
     // require that JSX labels use "htmlFor"
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/label-has-for.md
-    'jsx-a11y/label-has-for': [2, ['label']],
+    'jsx-a11y/label-has-for': ['error', ['label']],
 
     // require that mouseover/out come with focus/blur, for keyboard-only users
     // TODO: evaluate
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/mouse-events-have-key-events.md
-    'jsx-a11y/mouse-events-have-key-events': 0,
+    'jsx-a11y/mouse-events-have-key-events': 'off',
 
     // Prevent use of `accessKey`
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/no-access-key.md
-    'jsx-a11y/no-access-key': 2,
+    'jsx-a11y/no-access-key': 'error',
 
     // require onBlur instead of onChange
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/no-onchange.md
-    'jsx-a11y/no-onchange': 0,
+    'jsx-a11y/no-onchange': 'off',
 
     // Enforce that elements with onClick handlers must be focusable.
     // TODO: evaluate
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/onclick-has-focus.md
-    'jsx-a11y/onclick-has-focus': 0,
+    'jsx-a11y/onclick-has-focus': 'off',
 
     // require things with onClick to have an aria role
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/onclick-has-role.md
-    'jsx-a11y/onclick-has-role': 0,
+    'jsx-a11y/onclick-has-role': 'off',
 
     // Enforce that elements with ARIA roles must have all required attributes
     // for that role.
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/role-has-required-aria-props.md
-    'jsx-a11y/role-has-required-aria-props': 2,
+    'jsx-a11y/role-has-required-aria-props': 'error',
 
     // Enforce that elements with explicit or implicit roles defined contain
     // only aria-* properties supported by that role.
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/role-supports-aria-props.md
-    'jsx-a11y/role-supports-aria-props': 2,
+    'jsx-a11y/role-supports-aria-props': 'error',
 
     // Enforce tabIndex value is not greater than zero.
     // TODO: evaluate
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/tabindex-no-positive.md
-    'jsx-a11y/tabindex-no-positive': 0,
+    'jsx-a11y/tabindex-no-positive': 'off',
 
     // ensure <hX> tags have content and are not aria-hidden
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/heading-has-content.md
-    'jsx-a11y/heading-has-content': [2, ['']],
+    'jsx-a11y/heading-has-content': ['error', ['']],
 
     // require HTML elements to have a "lang" prop
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/html-has-lang.md
-    'jsx-a11y/html-has-lang': 2,
+    'jsx-a11y/html-has-lang': 'error',
 
     // require HTML element's lang prop to be valid
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/lang.md
-    'jsx-a11y/lang': 2,
+    'jsx-a11y/lang': 'error',
 
     // prevent marquee elements
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/no-marquee.md
-    'jsx-a11y/no-marquee': 2,
+    'jsx-a11y/no-marquee': 'error',
 
     // only allow <th> to have the "scope" attr
     // https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/scope.md
-    'jsx-a11y/scope': 2,
+    'jsx-a11y/scope': 'error',
   },
 };

packages/eslint-config-airbnb/rules/react.js

@@ -16,50 +16,50 @@ module.exports = {
   rules: {
     // Specify whether double or single quotes should be used in JSX attributes
     // http://eslint.org/docs/rules/jsx-quotes
-    'jsx-quotes': [2, 'prefer-double'],
+    'jsx-quotes': ['error', 'prefer-double'],
 
     // Prevent missing displayName in a React component definition
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/display-name.md
-    'react/display-name': [0, { ignoreTranspilerName: false }],
+    'react/display-name': ['off', { ignoreTranspilerName: false }],
 
     // Forbid certain propTypes (any, array, object)
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/forbid-prop-types.md
-    'react/forbid-prop-types': [0, { forbid: ['any', 'array', 'object'] }],
+    'react/forbid-prop-types': ['off', { forbid: ['any', 'array', 'object'] }],
 
     // Enforce boolean attributes notation in JSX
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-boolean-value.md
-    'react/jsx-boolean-value': [2, 'never'],
+    'react/jsx-boolean-value': ['error', 'never'],
 
     // Validate closing bracket location in JSX
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-closing-bracket-location.md
-    'react/jsx-closing-bracket-location': [2, 'line-aligned'],
+    'react/jsx-closing-bracket-location': ['error', 'line-aligned'],
 
     // Enforce or disallow spaces inside of curly braces in JSX attributes
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-curly-spacing.md
-    'react/jsx-curly-spacing': [2, 'never', { allowMultiline: true }],
+    'react/jsx-curly-spacing': ['error', 'never', { allowMultiline: true }],
 
     // Enforce event handler naming conventions in JSX
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-handler-names.md
-    'react/jsx-handler-names': [0, {
+    'react/jsx-handler-names': ['off', {
       eventHandlerPrefix: 'handle',
       eventHandlerPropPrefix: 'on',
     }],
 
     // Validate props indentation in JSX
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-indent-props.md
-    'react/jsx-indent-props': [2, 2],
+    'react/jsx-indent-props': ['error', 2],
 
     // Validate JSX has key prop when in array or iterator
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-key.md
-    'react/jsx-key': 0,
+    'react/jsx-key': 'off',
 
     // Limit maximum of props on a single line in JSX
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-max-props-per-line.md
-    'react/jsx-max-props-per-line': [0, { maximum: 1 }],
+    'react/jsx-max-props-per-line': ['off', { maximum: 1 }],
 
     // Prevent usage of .bind() in JSX props
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-no-bind.md
-    'react/jsx-no-bind': [2, {
+    'react/jsx-no-bind': ['error', {
       ignoreRefs: true,
       allowArrowFunctions: true,
       allowBind: false,
@@ -67,37 +67,37 @@ module.exports = {
 
     // Prevent duplicate props in JSX
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-no-duplicate-props.md
-    'react/jsx-no-duplicate-props': [0, { ignoreCase: false }],
+    'react/jsx-no-duplicate-props': ['off', { ignoreCase: false }],
 
     // Prevent usage of unwrapped JSX strings
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-no-literals.md
-    'react/jsx-no-literals': 0,
+    'react/jsx-no-literals': 'off',
 
     // Disallow undeclared variables in JSX
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-no-undef.md
-    'react/jsx-no-undef': 2,
+    'react/jsx-no-undef': 'error',
 
     // Enforce PascalCase for user-defined JSX components
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-pascal-case.md
-    'react/jsx-pascal-case': [2, {
+    'react/jsx-pascal-case': ['error', {
       allowAllCaps: true,
       ignore: [],
     }],
 
     // Enforce propTypes declarations alphabetical sorting
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/sort-prop-types.md
-    'react/sort-prop-types': [0, {
+    'react/sort-prop-types': ['off', {
       ignoreCase: false,
       callbacksLast: false,
       requiredFirst: false,
     }],
 
     // Deprecated in favor of react/jsx-sort-props
-    'react/jsx-sort-prop-types': 0,
+    'react/jsx-sort-prop-types': 'off',
 
     // Enforce props alphabetical sorting
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-sort-props.md
-    'react/jsx-sort-props': [0, {
+    'react/jsx-sort-props': ['off', {
       ignoreCase: false,
       callbacksLast: false,
       shorthandFirst: false,
@@ -106,87 +106,87 @@ module.exports = {
 
     // Prevent React to be incorrectly marked as unused
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-uses-react.md
-    'react/jsx-uses-react': [2],
+    'react/jsx-uses-react': ['error'],
 
     // Prevent variables used in JSX to be incorrectly marked as unused
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-uses-vars.md
-    'react/jsx-uses-vars': 2,
+    'react/jsx-uses-vars': 'error',
 
     // Prevent usage of dangerous JSX properties
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-danger.md
-    'react/no-danger': 0,
+    'react/no-danger': 'off',
 
     // Prevent usage of deprecated methods
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-deprecated.md
-    'react/no-deprecated': [2],
+    'react/no-deprecated': ['error'],
 
     // Prevent usage of setState in componentDidMount
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-did-mount-set-state.md
-    'react/no-did-mount-set-state': [2],
+    'react/no-did-mount-set-state': ['error'],
 
     // Prevent usage of setState in componentDidUpdate
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-did-update-set-state.md
-    'react/no-did-update-set-state': [2],
+    'react/no-did-update-set-state': ['error'],
 
     // Prevent direct mutation of this.state
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-direct-mutation-state.md
-    'react/no-direct-mutation-state': 0,
+    'react/no-direct-mutation-state': 'off',
 
     // Prevent usage of isMounted
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-is-mounted.md
-    'react/no-is-mounted': 2,
+    'react/no-is-mounted': 'error',
 
     // Prevent multiple component definition per file
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-multi-comp.md
-    'react/no-multi-comp': [2, { ignoreStateless: true }],
+    'react/no-multi-comp': ['error', { ignoreStateless: true }],
 
     // Prevent usage of setState
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-set-state.md
-    'react/no-set-state': 0,
+    'react/no-set-state': 'off',
 
     // Prevent using string references
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-string-refs.md
-    'react/no-string-refs': 2,
+    'react/no-string-refs': 'error',
 
     // Prevent usage of unknown DOM property
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-unknown-property.md
-    'react/no-unknown-property': 2,
+    'react/no-unknown-property': 'error',
 
     // Require ES6 class declarations over React.createClass
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/prefer-es6-class.md
-    'react/prefer-es6-class': [2, 'always'],
+    'react/prefer-es6-class': ['error', 'always'],
 
     // Require stateless functions when not using lifecycle methods, setState or ref
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/prefer-stateless-function.md
-    'react/prefer-stateless-function': 2,
+    'react/prefer-stateless-function': 'error',
 
     // Prevent missing props validation in a React component definition
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/prop-types.md
-    'react/prop-types': [2, { ignore: [], customValidators: [] }],
+    'react/prop-types': ['error', { ignore: [], customValidators: [] }],
 
     // Prevent missing React when using JSX
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/react-in-jsx-scope.md
-    'react/react-in-jsx-scope': 2,
+    'react/react-in-jsx-scope': 'error',
 
     // Restrict file extensions that may be required
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/require-extension.md
-    'react/require-extension': [2, { extensions: ['.jsx', '.js'] }],
+    'react/require-extension': ['error', { extensions: ['.jsx', '.js'] }],
 
     // Require render() methods to return something
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/require-render-return.md
-    'react/require-render-return': 2,
+    'react/require-render-return': 'error',
 
     // Prevent extra closing tags for components without children
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/self-closing-comp.md
-    'react/self-closing-comp': 2,
+    'react/self-closing-comp': 'error',
 
     // Enforce spaces before the closing bracket of self-closing JSX elements
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-space-before-closing.md
-    'react/jsx-space-before-closing': [2, 'always'],
+    'react/jsx-space-before-closing': ['error', 'always'],
 
     // Enforce component methods order
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/sort-comp.md
-    'react/sort-comp': [2, {
+    'react/sort-comp': ['error', {
       order: [
         'static-methods',
         'lifecycle',
@@ -200,58 +200,58 @@ module.exports = {
 
     // Prevent missing parentheses around multilines JSX
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-wrap-multilines.md
-    'react/jsx-wrap-multilines': [2, {
+    'react/jsx-wrap-multilines': ['error', {
       declaration: true,
       assignment: true,
       return: true
     }],
-    'react/wrap-multilines': 0, // deprecated version
+    'react/wrap-multilines': 'off', // deprecated version
 
     // Require that the first prop in a JSX element be on a new line when the element is multiline
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-first-prop-new-line.md
-    'react/jsx-first-prop-new-line': [2, 'multiline'],
+    'react/jsx-first-prop-new-line': ['error', 'multiline'],
 
     // Enforce spacing around jsx equals signs
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-equals-spacing.md
-    'react/jsx-equals-spacing': [2, 'never'],
+    'react/jsx-equals-spacing': ['error', 'never'],
 
     // Enforce JSX indentation
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-indent.md
-    'react/jsx-indent': [2, 2],
+    'react/jsx-indent': ['error', 2],
 
     // Disallow target="_blank" on links
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-no-target-blank.md
-    'react/jsx-no-target-blank': 2,
+    'react/jsx-no-target-blank': 'error',
 
     // only .jsx files may have JSX
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-filename-extension.md
-    'react/jsx-filename-extension': [2, { extensions: ['.jsx'] }],
+    'react/jsx-filename-extension': ['error', { extensions: ['.jsx'] }],
 
     // prevent accidental JS comments from being injected into JSX as text
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-no-comment-textnodes.md
-    'react/jsx-no-comment-textnodes': 2,
-    'react/no-comment-textnodes': 0, // deprecated version
+    'react/jsx-no-comment-textnodes': 'error',
+    'react/no-comment-textnodes': 'off', // deprecated version
 
     // disallow using React.render/ReactDOM.render's return value
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-render-return-value.md
-    'react/no-render-return-value': 2,
+    'react/no-render-return-value': 'error',
 
     // require a shouldComponentUpdate method, or PureRenderMixin
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/require-optimization.md
-    'react/require-optimization': [0, { allowDecorators: [] }],
+    'react/require-optimization': ['off', { allowDecorators: [] }],
 
     // warn against using findDOMNode()
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-find-dom-node.md
-    'react/no-find-dom-node': 2,
+    'react/no-find-dom-node': 'error',
 
     // Forbid certain props on Components
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/forbid-component-props.md
-    'react/forbid-component-props': [0, { forbid: [] }],
+    'react/forbid-component-props': ['off', { forbid: [] }],
 
     // Prevent problem with children and props.dangerouslySetInnerHTML
     // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-danger-with-children.md
     // TODO: enable, semver-major
-    'react/no-danger-with-children': 0,
+    'react/no-danger-with-children': 'off',
   },
 
   settings: {