odin-default-js-exercises/node_modules/eslint-config-airbnb-base/rules/best-practices.js

319 lines
9.8 KiB
JavaScript

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