@xwtec/eslint-config NPM

@xwtec/eslint-config

ESLint Configuration for xwtec projects

Install

yarn add --dev eslint prettier @xwtec/eslint-config @xwtec/prettier-config

Configuration

Add following code

module.exports = {
  extends: ['@xwtec'],
};

to .eslintrc.js in your project.

You may also want config prettier with @xwtec/prettier-config.

Usage

npx eslint "**/*.js"

Rules

Error

#	Type	Rule	Description
1	error	no-caller	Disallow the use of `arguments.caller` or `arguments.callee`
2	error	no-class-assign	Disallow reassigning class members
3	error	no-const-assign	Disallow reassigning `const` variables
4	error	no-delete-var	Disallow deleting variables
5	error	no-dupe-args	Disallow duplicate arguments in `function` definitions
6	error	no-dupe-class-members	Disallow duplicate class members
7	error	no-dupe-else-if	Disallow duplicate conditions in if-else-if chains
8	error	no-dupe-keys	Disallow duplicate keys in object literals
9	error	no-empty-pattern	Disallow empty destructuring patterns
10	error	no-eval	Disallow the use of `eval()`
11	error	no-func-assign	Disallow reassigning `function` declarations
12	error	no-implied-eval	Disallow the use of `eval()`-like methods
13	error	no-import-assign	Disallow assigning to imported bindings
14	error	no-irregular-whitespace	Disallow irregular whitespace
15	error	no-new-symbol	Disallow `new` operators with the `Symbol` object
16	error	no-obj-calls	Disallow calling global object properties as functions
17	error	no-redeclare	Disallow variable redeclaration
18	error	no-restricted-globals	Disallow specified global variables
19	error	no-self-compare	Disallow comparisons where both sides are exactly the same
20	error	no-sequences	Disallow comma operators
21	error	no-setter-return	Disallow returning values from setters
22	error	no-undef	Disallow the use of undeclared variables unless mentioned in `/global /` comments
23	error	no-unused-expressions	Disallow unused expressions
24	error	radix	Enforce the consistent use of the radix argument when using `parseInt()`
25	error	require-yield	Require generator functions to contain `yield`
26	error	use-isnan	Require calls to `isNaN()` when checking for `NaN`
27	error	regexp/no-legacy-features	disallow legacy RegExp features

Warn

#	Type	Rule	Description
1	warn	constructor-super	Require `super()` calls in constructors
2	warn	default-case-last	Enforce default clauses in switch statements to be last
3	warn	for-direction	Enforce "for" loop update clause moving the counter in the right direction
4	warn	getter-return	Enforce `return` statements in getters
5	warn	no-case-declarations	Disallow lexical declarations in case clauses
6	warn	no-compare-neg-zero	Disallow comparing against -0
7	warn	no-constant-condition	Disallow constant expressions in conditions
8	warn	no-duplicate-case	Disallow duplicate case labels
9	warn	no-empty	Disallow empty block statements
10	warn	no-empty-character-class	Disallow empty character classes in regular expressions
11	warn	no-ex-assign	Disallow reassigning exceptions in `catch` clauses
12	warn	no-extend-native	Disallow extending native types
13	warn	no-fallthrough	Disallow fallthrough of `case` statements
14	warn	no-global-assign	Disallow assignments to native objects or read-only global variables
15	warn	no-inner-declarations	Disallow variable or `function` declarations in nested blocks
16	warn	no-invalid-regexp	Disallow invalid regular expression strings in `RegExp` constructors
17	warn	no-iterator	Disallow the use of the `__iterator__` property
18	warn	no-labels	Disallow labeled statements
19	warn	no-multi-str	Disallow multiline strings
20	warn	no-new-wrappers	Disallow `new` operators with the `String`, `Number`, and `Boolean` objects
21	warn	no-octal	Disallow octal literals
22	warn	no-octal-escape	Disallow octal escape sequences in string literals
23	warn	no-proto	Disallow the use of the `__proto__` property
24	warn	no-restricted-properties	Disallow certain properties on certain objects
25	warn	no-self-assign	Disallow assignments where both sides are exactly the same
26	warn	no-sparse-arrays	Disallow sparse arrays
27	warn	no-this-before-super	Disallow `this`/`super` before calling `super()` in constructors
28	warn	no-throw-literal	Disallow throwing literals as exceptions
29	warn	no-unmodified-loop-condition	Disallow unmodified loop conditions
30	warn	no-unreachable	Disallow unreachable code after `return`, `throw`, `continue`, and `break` statements
31	warn	no-unsafe-finally	Disallow control flow statements in `finally` blocks
32	warn	no-unsafe-negation	Disallow negating the left operand of relational operators
33	warn	no-unsafe-optional-chaining	Disallow use of optional chaining in contexts where the `undefined` value is not allowed
34	warn	no-unused-vars	Disallow unused variables
35	warn	no-useless-escape	Disallow unnecessary escape characters
36	warn	no-void	Disallow `void` operators
37	warn	no-with	Disallow `with` statements
38	warn	valid-typeof	Enforce comparing `typeof` expressions against valid strings
39	warn	import/extensions	Ensure consistent use of file extension within the import path.

Fixable

#	Type	Rule	Description
1	warn	curly	Enforce consistent brace style for all control statements
2	warn	dot-notation	Enforce dot notation whenever possible
3	error	eqeqeq	Require the use of `===` and `!==`
4	warn	no-div-regex	Disallow equal signs explicitly at the beginning of regular expressions
5	warn	no-else-return	Disallow `else` blocks after `return` statements in `if` statements
6	warn	no-extra-bind	Disallow unnecessary calls to `.bind()`
7	warn	no-extra-boolean-cast	Disallow unnecessary boolean casts
8	warn	no-extra-label	Disallow unnecessary labels
9	warn	no-regex-spaces	Disallow multiple spaces in regular expressions
10	warn	no-undef-init	Disallow initializing variables to `undefined`
11	warn	no-unneeded-ternary	Disallow ternary operators when simpler alternatives exist
12	warn	no-unused-labels	Disallow unused labels
13	warn	no-useless-computed-key	Disallow unnecessary computed property keys in objects and classes
14	warn	no-useless-rename	Disallow renaming import, export, and destructured assignments to the same name
15	warn	no-useless-return	Disallow redundant return statements
16	warn	no-var	Require `let` or `const` instead of `var`
17	warn	object-shorthand	Require or disallow method and property shorthand syntax for object literals
18	warn	one-var	Enforce variables to be declared either together or separately in functions
19	warn	operator-assignment	Require or disallow assignment operator shorthand where possible
20	warn	prefer-const	Require `const` declarations for variables that are never reassigned after declared
21	warn	prefer-destructuring	Require destructuring from arrays and/or objects
22	warn	prefer-exponentiation-operator	Disallow the use of `Math.pow` in favor of the `**` operator
23	warn	prefer-numeric-literals	Disallow `parseInt()` and `Number.parseInt()` in favor of binary, octal, and hexadecimal literals
24	warn	prefer-object-spread	Disallow using Object.assign with an object literal as the first argument and prefer the use of object spread instead
25	warn	prefer-template	Require template literals instead of string concatenation
26	warn	spaced-comment	Enforce consistent spacing after the `//` or `/*` in a comment
27	warn	yoda	Require or disallow "Yoda" conditions
28	warn	import/newline-after-import	Enforce a newline after import statements.
29	warn	import/order	Enforce a convention in module import order.