@xwtec/eslint-config-legacy

ESLint Configuration for xwtec es5 projects

Install

# with yarn
yarn add --dev eslint prettier @xwtec/eslint-config-legacy @xwtec/prettier-config

# with npm
npm install --save-dev eslint prettier @xwtec/eslint-config-legacy @xwtec/prettier-config

Configuration

Add following code

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

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-delete-var | disallow deleting variables | | 3 | error | no-dupe-args | disallow duplicate arguments in function definitions | | 4 | error | no-dupe-else-if | disallow duplicate conditions in if-else-if chains | | 5 | error | no-dupe-keys | disallow duplicate keys in object literals | | 6 | error | no-empty-pattern | disallow empty destructuring patterns | | 7 | error | no-eval | disallow the use of eval() | | 8 | error | no-func-assign | disallow reassigning function declarations | | 9 | error | no-implied-eval | disallow the use of eval()-like methods | | 10 | error | no-import-assign | disallow assigning to imported bindings | | 11 | error | no-irregular-whitespace | disallow irregular whitespace | | 12 | error | no-obj-calls | disallow calling global object properties as functions | | 13 | error | no-redeclare | disallow variable redeclaration | | 14 | error | no-self-compare | disallow comparisons where both sides are exactly the same | | 15 | error | no-sequences | disallow comma operators | | 16 | error | no-setter-return | disallow returning values from setters | | 17 | error | no-undef | disallow the use of undeclared variables unless mentioned in /*global */ comments | | 18 | error | radix | enforce the consistent use of the radix argument when using parseInt() | | 19 | error | use-isnan | require calls to isNaN() when checking for NaN |

Warn

| # | Type | Rule | Description | | :-: | :--: | :----------------------------------------------------------------------------------------- | :--------------------------------------------------------------------------------------- | | 1 | warn | default-case-last | enforce default clauses in switch statements to be last | | 2 | warn | for-direction | enforce "for" loop update clause moving the counter in the right direction. | | 3 | warn | getter-return | enforce return statements in getters | | 4 | warn | no-case-declarations | disallow lexical declarations in case clauses | | 5 | warn | no-catch-shadow | disallow catch clause parameters from shadowing variables in the outer scope | | 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-globals | disallow specified global variables | | 25 | warn | no-restricted-properties | disallow certain properties on certain objects | | 26 | warn | no-self-assign | disallow assignments where both sides are exactly the same | | 27 | warn | no-sparse-arrays | disallow sparse arrays | | 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 |

Fixable

| # | Type | Rule | Description | | :-: | :---: | :------------------------------------------------------------------------------ | :----------------------------------------------------------------------------- | | 1 | warn | comma-style | enforce consistent comma style | | 2 | warn | curly | enforce consistent brace style for all control statements | | 3 | warn | dot-notation | enforce dot notation whenever possible | | 4 | error | eqeqeq | require the use of === and !== | | 5 | warn | no-div-regex | disallow division operators explicitly at the beginning of regular expressions | | 6 | warn | no-else-return | disallow else blocks after return statements in if statements | | 7 | warn | no-extra-bind | disallow unnecessary calls to .bind() | | 8 | warn | no-extra-boolean-cast | disallow unnecessary boolean casts | | 9 | warn | no-extra-label | disallow unnecessary labels | | 10 | warn | no-regex-spaces | disallow multiple spaces in regular expressions | | 11 | warn | no-undef-init | disallow initializing variables to undefined | | 12 | warn | no-unneeded-ternary | disallow ternary operators when simpler alternatives exist | | 13 | warn | no-unused-labels | disallow unused labels | | 14 | warn | no-useless-return | disallow redundant return statements | | 15 | warn | one-var | enforce variables to be declared either together or separately in functions | | 16 | warn | operator-assignment | require or disallow assignment operator shorthand where possible | | 17 | warn | spaced-comment | enforce consistent spacing after the // or /* in a comment | | 18 | warn | strict | require or disallow strict mode directives | | 19 | warn | yoda | require or disallow "Yoda" conditions | | 20 | warn | prettier/prettier |

Related

• @xwtec/eslint-config
• @xwtec/eslint-config-vue
• @xwtec/prettier-config

Links

• ESLint
• Prettier