eslint-plugin-jsdoc-ex

v1.0.0

Published

3 years ago

JSDoc linting rules for ESLint.

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kirgene

eslint plugin jsdoc

eslint-plugin-jsdoc

JSDoc linting rules for ESLint.

eslint-plugin-jsdoc

Reference to jscs-jsdoc

This table maps the rules between eslint-plugin-jsdoc and jscs-jsdoc.

| eslint-plugin-jsdoc | jscs-jsdoc | | --- | --- | | check-alignment | N/A | | check-examples | N/A | | check-indentation | N/A | | check-param-names | checkParamNames | | check-syntax | N/A | | check-tag-names | N/A ~ checkAnnotations | | check-types | checkTypes | | newline-after-description | requireNewlineAfterDescription and disallowNewlineAfterDescription | | require-description | N/A | | require-description-complete-sentence | requireDescriptionCompleteSentence | | require-example | N/A | | require-hyphen-before-param-description | requireHyphenBeforeDescription | | require-param | checkParamExistence | | require-param-description | requireParamDescription | | require-param-name | N/A | | require-param-type | requireParamTypes | | require-returns | requireReturn | | require-returns-check | requireReturn | | require-returns-description | requireReturnDescription | | require-returns-type | requireReturnTypes | | valid-types | N/A | | no-undefined-types | N/A | | N/A | checkReturnTypes | | N/A | checkRedundantParams | | N/A | checkReturnTypes | | N/A | checkRedundantAccess | | N/A | enforceExistence | | N/A | leadingUnderscoreAccess |

Installation

Install ESLint either locally or globally.

npm install --save-dev eslint

If you have installed ESLint globally, you have to install JSDoc plugin globally too. Otherwise, install it locally.

npm install --save-dev eslint-plugin-jsdoc

Configuration

Add plugins section and specify eslint-plugin-jsdoc as a plugin.

{
    "plugins": [
        "jsdoc"
    ]
}

Finally, enable all of the rules that you would like to use.

{
    "rules": {
        "jsdoc/check-alignment": 1,
        "jsdoc/check-examples": 1,
        "jsdoc/check-indentation": 1,
        "jsdoc/check-param-names": 1,
        "jsdoc/check-syntax": 1,
        "jsdoc/check-tag-names": 1,
        "jsdoc/check-types": 1,
        "jsdoc/implements-on-classes": 1,
        "jsdoc/match-description": 1,
        "jsdoc/newline-after-description": 1,
        "jsdoc/no-types": 1,
        "jsdoc/no-undefined-types": 1,
        "jsdoc/require-description": 1,
        "jsdoc/require-description-complete-sentence": 1,
        "jsdoc/require-example": 1,
        "jsdoc/require-hyphen-before-param-description": 1,
        "jsdoc/require-jsdoc": 1,
        "jsdoc/require-param": 1,
        "jsdoc/require-param-description": 1,
        "jsdoc/require-param-name": 1,
        "jsdoc/require-param-type": 1,
        "jsdoc/require-returns": 1,
        "jsdoc/require-returns-check": 1,
        "jsdoc/require-returns-description": 1,
        "jsdoc/require-returns-type": 1,
        "jsdoc/valid-types": 1
    }
}

Settings

Allow @private to disable rules for that comment block

settings.jsdoc.ignorePrivate - Disables all rules for the comment block on which it occurs.

Exempting empty functions from require-jsdoc

settings.jsdoc.exemptEmptyFunctions - Will not report missing jsdoc blocks above functions/methods with no parameters or return values (intended where variable names are sufficient for themselves as documentation).

Alias Preference

Use settings.jsdoc.tagNamePreference to configure a preferred alias name for a JSDoc tag. The format of the configuration is: <primary tag name>: <preferred alias name>, e.g.

{
    "rules": {},
    "settings": {
        "jsdoc": {
            "tagNamePreference": {
                "param": "arg",
                "returns": "return"
            }
        }
    }
}

The defaults in eslint-plugin-jsdoc (for tags which offer aliases) are as follows:

@abstract (over @virtual)
@augments (over @extends)
@class (over @constructor)
@constant (over @const)
@default (over @defaultvalue)
@description (over @desc)
@external (over @host)
@file (over @fileoverview, @overview)
@fires (over @emits)
@function (over @func, @method)
@member (over @var)
@param (over @arg, @argument)
@property (over @prop)
@returns (over @return)
@throws (over @exception)
@yields (over @yield)

This setting is utilized by the the rule for tag name checking (check-tag-names) as well as in the @param and @require rules:

check-param-names
check-tag-names
require-hyphen-before-param-description
require-description
require-param
require-param-description
require-param-name
require-param-type
require-returns
require-returns-check
require-returns-description
require-returns-type

Additional Tag Names

Use settings.jsdoc.additionalTagNames to configure additional, allowed JSDoc tags in the rule check-tag-names. The format of the configuration is as follows:

{
    "rules": {},
    "settings": {
        "jsdoc": {
            "additionalTagNames": {
                "customTags": ["define", "record"]
            }
        }
    }
}

@override/@augments/@extends/@implements Without Accompanying @param/@description/@example/@returns

The following settings allows the element(s) they reference to be omitted on the JSDoc comment block of the function or that of its parent class for any of the "require" rules (i.e., require-param, require-description, require-example, or require-returns).

settings.jsdoc.overrideReplacesDocs (@override) - Defaults to true
settings.jsdoc.augmentsExtendsReplacesDocs (@augments or its alias @extends) - Defaults to false.
settings.jsdoc.implementsReplacesDocs (@implements) - Defaults to false

The format of the configuration is as follows:

{
    "rules": {},
    "settings": {
        "jsdoc": {
            "overrideReplacesDocs": true,
            "augmentsExtendsReplacesDocs": true,
            "implementsReplacesDocs": true
        }
    }
}

settings.jsdoc.allowOverrideWithoutParam, settings.jsdoc.allowImplementsWithoutParam, and settings.jsdoc.allowAugmentsExtendsWithoutParam performed a similar function but restricted to @param. These settings are now deprecated.

Settings to Configure check-types and no-undefined-types

settings.jsdoc.preferredTypes An option map to indicate preferred or forbidden types (if default types are indicated here, these will have precedence over the default recommendations for check-types). The keys of this map are the types to be replaced (or forbidden). These keys may include:
1. The "ANY" type, *
2. The pseudo-type [] which we use to denote the parent (array) types used in the syntax string[], number[], etc.
3. The pseudo-type .<> (or .) to represent the format Array.<value> or Object.<key, value>
4. The pseudo-type <> to represent the format Array<value> or Object<key, value>
5. A plain string type, e.g., MyType
6. A plain string type followed by one of the above pseudo-types (except for [] which is always assumed to be an Array), e.g., Array., or SpecialObject<>.
If a bare pseudo-type is used, it will match all parent types of that form. If a pseudo-type prefixed with a type name is used, it will only match parent types of that form and type name.
The values can be:
- false to forbid the type
- a string to indicate the type that should be preferred in its place (and which fix mode can replace); this can be one of the formats of the keys described above. Note that the format will not be changed unless you use a pseudo-type in the replacement (e.g., 'Array.<>': 'MyArray' will change Array.<string> to MyArray.<string>, preserving the dot; to get rid of the dot, you must use the pseudo-type: 'Array.<>': 'MyArray<>' which will change Array.<string> to MyArray<string>). If you use a bare pseudo-type in the replacement, e.g., 'MyArray.<>': '<>', the type will be converted to the format of the pseudo-type without changing the type name, i.e., MyArray.<string> will become MyArray<string> but Array.<string> will not be modified.
- an object with the key message to provide a specific error message when encountering the discouraged type and, if a type is to be preferred in its place, the key replacement to indicate the type that should be used in its place (and which fix mode can replace) or false if forbidding the type. The message string will have the following substrings with special meaning replaced with their corresponding value ({{tagName}}, {{tagValue}}, {{badType}}, and {{preferredType}} (or {{replacement}}), noting that the latter is of no use when one is merely forbidding a type).

If no-undefined-types has the option key preferredTypesDefined set to true, the preferred types indicated in the settings.jsdoc.preferredTypes map will be assumed to be defined.

See the option of check-types, unifyParentAndChildTypeChecks, for how the keys of preferredTypes may have <> or .<> (or just .) appended and its bearing on whether types are checked as parents/children only (e.g., to match Array if the type is Array vs. Array.<string>).

Settings to Configure valid-types

settings.jsdoc.allowEmptyNamepaths - Set to false to disallow empty name paths with @callback, @event, @class, @constructor, @constant, @const, @function, @func, @method, @interface, @member, @var, @mixin, @namespace, @listens, @fires, or @emits (these might often be expected to have an accompanying name path, though they have some indicative value without one; these may also allow names to be defined in another manner elsewhere in the block)
settings.jsdoc.checkSeesForNamepaths - Set this to true to insist that @see only use name paths (the tag is normally permitted to allow other text)

Settings to Configure require-returns

settings.jsdoc.forceRequireReturn - Set to true to always insist on @returns documentation regardless of implicit or explicit return's in the function. May be desired to flag that a project is aware of an undefined/void return.

Settings to Configure require-example

settings.jsdoc.avoidExampleOnConstructors - Set to true to avoid the need for an example on a constructor (whether indicated as such by a jsdoc tag or by being within an ES6 class).

Settings to Configure check-examples

The settings below all impact the check-examples rule and default to no-op/false except as noted.

JSDoc specs use of an optional <caption> element at the beginning of @example. The following setting requires its use.

settings.jsdoc.captionRequired - Require <caption> at beginning of any @example

JSDoc does not specify a formal means for delimiting code blocks within @example (it uses generic syntax highlighting techniques for its own syntax highlighting). The following settings determine whether a given @example tag will have the check-examples checks applied to it:

settings.jsdoc.exampleCodeRegex - Regex which whitelists lintable examples. If a parenthetical group is used, the first one will be used, so you may wish to use (?:...) groups where you do not wish the first such group treated as one to include. If no parenthetical group exists or matches, the whole matching expression will be used. An example might be "^```(?:js|javascript)([\\s\\S]*)```$" to only match explicitly fenced JavaScript blocks.
settings.jsdoc.rejectExampleCodeRegex - Regex blacklist which rejects non-lintable examples (has priority over exampleCodeRegex). An example might be "^`" to avoid linting fenced blocks which may indicate a non-JavaScript language.

If neither is in use, all examples will be matched. Note also that even if settings.jsdoc.captionRequired is not set, any initial <caption> will be stripped out before doing the regex matching.

The following settings determine which individual ESLint rules will be applied to the JavaScript found within the @example tags (as determined to be applicable by the above regex settings). They are ordered by decreasing precedence:

settings.jsdoc.allowInlineConfig - If not set to false, will allow inline config within the @example to override other config. Defaults to true.
settings.jsdoc.noDefaultExampleRules - Setting to true will disable the default rules which are expected to be troublesome for most documentation use. See the section below for the specific default rules.
settings.jsdoc.matchingFileName - Setting for a dummy file name to trigger specific rules defined in one's config; usable with ESLint .eslintrc.* overrides -> files globs, to apply a desired subset of rules with @example (besides allowing for rules specific to examples, this setting can be useful for enabling reuse of the same rules within @example as with JavaScript Markdown lintable by other plugins, e.g., if one sets matchingFileName to dummy.md so that @example rules will follow one's Markdown rules).
settings.jsdoc.configFile - A config file. Corresponds to ESLint's -c.
settings.jsdoc.eslintrcForExamples - Defaults to true in adding rules based on an .eslintrc.* file. Setting to false corresponds to ESLint's --no-eslintrc.
settings.jsdoc.baseConfig - An object of rules with the same schema as .eslintrc.* for defaults

Finally, the following rule pertains to inline disable directives:

settings.jsdoc.reportUnusedDisableDirectives - If not set to false, this will report disabled directives which are not used (and thus not needed). Defaults to true. Corresponds to ESLint's --report-unused-disable-directives.

Rules Disabled by Default Unless noDefaultExampleRules is Set to true

eol-last - Insisting that a newline "always" be at the end is less likely to be desired in sample code as with the code file convention
no-console - Unlikely to have inadvertent temporary debugging within examples
no-undef - Many variables in examples will be undefined.
no-unused-vars - It is common to define variables for clarity without always using them within examples.
padded-blocks - It can generally look nicer to pad a little even if one's code follows more stringency as far as block padding.
import/no-unresolved - One wouldn't generally expect example paths to resolve relative to the current JavaScript file as one would with real code.
import/unambiguous - Snippets in examples are likely too short to always include full import/export info
node/no-missing-import - See import/no-unresolved
node/no-missing-require - See import/no-unresolved

Rules

check-alignment

Reports invalid alignment of JSDoc block asterisks.

||| |---|---| |Context|ArrowFunctionExpression, FunctionDeclaration, FunctionExpression| |Tags|N/A|

The following patterns are considered problems:

/**
  * @param {Number} foo
 */
function quux (foo) {

}
// Message: Expected JSDoc block to be aligned.

/**
 * @param {Number} foo
  */
function quux (foo) {

}
// Message: Expected JSDoc block to be aligned.

/**
 * @param {Number} foo
 */
function quux (foo) {

}
// Message: Expected JSDoc block to be aligned.

/**
  * @param {Number} foo
 */
function quux (foo) {

}
// Message: Expected JSDoc block to be aligned.

/**
 * @param {Number} foo
 */
function quux (foo) {

}
// Message: Expected JSDoc block to be aligned.

The following patterns are not considered problems:

/**
 * Desc
 *
 * @param {Number} foo
 */
function quux (foo) {

}

/**
 * Desc
 *
 * @param {{
  foo: Bar,
  bar: Baz
 * }} foo
 *
 */
function quux (foo) {

}

check-examples

Ensures that (JavaScript) examples within JSDoc adhere to ESLint rules.

Works in conjunction with the following settings:

captionRequired
exampleCodeRegex
rejectExampleCodeRegex
allowInlineConfig - Defaults to true
noDefaultExampleRules
matchingFileName
configFile
eslintrcForExamples - Defaults to true
baseConfig
reportUnusedDisableDirectives - Defaults to true

Inline ESLint config within @example JavaScript is allowed, though the disabling of ESLint directives which are not needed by the resolved rules will be reported as with the ESLint --report-unused-disable-directives command.

||| |---|---| |Context|ArrowFunctionExpression, ClassDeclaration, FunctionDeclaration, FunctionExpression| |Tags|example| |Settings| See above |

The following patterns are considered problems:

/**
 * @example alert('hello')
 */
function quux () {

}
// Settings: {"jsdoc":{"baseConfig":{"rules":{"no-alert":2,"semi":["error","always"]}},"eslintrcForExamples":false}}
// Message: @example error (no-alert): Unexpected alert.

/**
 * @example alert('hello')
 */
class quux {

}
// Settings: {"jsdoc":{"baseConfig":{"rules":{"no-alert":2,"semi":["error","always"]}},"eslintrcForExamples":false}}
// Message: @example error (no-alert): Unexpected alert.

/**
 * @example ```js
 alert('hello');
 ```
 */
function quux () {

}
// Settings: {"jsdoc":{"baseConfig":{"rules":{"semi":["error","never"]}},"eslintrcForExamples":false,"exampleCodeRegex":"```js([\\s\\S]*)```"}}
// Message: @example error (semi): Extra semicolon.

/**
 * @example
 * ```js alert('hello'); ```
 */
function quux () {

}
// Settings: {"jsdoc":{"baseConfig":{"rules":{"semi":["error","never"]}},"eslintrcForExamples":false,"exampleCodeRegex":"```js ([\\s\\S]*)```"}}
// Message: @example error (semi): Extra semicolon.

/**
 * @example ```
 * js alert('hello'); ```
 */
function quux () {

}
// Settings: {"jsdoc":{"baseConfig":{"rules":{"semi":["error","never"]}},"eslintrcForExamples":false,"exampleCodeRegex":"```\njs ([\\s\\S]*)```"}}
// Message: @example error (semi): Extra semicolon.

/**
 * @example <b>Not JavaScript</b>
 */
function quux () {

}
/**
 * @example quux2();
 */
function quux2 () {

}
// Settings: {"jsdoc":{"baseConfig":{"rules":{"semi":["error","never"]}},"eslintrcForExamples":false,"rejectExampleCodeRegex":"^\\s*<.*>$"}}
// Message: @example error (semi): Extra semicolon.

/**
 * @example
 * quux(); // does something useful
 */
function quux () {

}
// Settings: {"jsdoc":{"baseConfig":{"rules":{"no-undef":["error"]}},"eslintrcForExamples":false,"noDefaultExampleRules":true}}
// Message: @example error (no-undef): 'quux' is not defined.

/**
 * @example <caption>Valid usage</caption>
 * quux(); // does something useful
 *
 * @example
 * quux('random unwanted arg'); // results in an error
 */
function quux () {

}
// Settings: {"jsdoc":{"captionRequired":true,"eslintrcForExamples":false}}
// Message: Caption is expected for examples.

/**
 * @example  quux();
 */
function quux () {

}
// Settings: {"jsdoc":{"baseConfig":{"rules":{"indent":["error"]}},"eslintrcForExamples":false,"noDefaultExampleRules":false}}
// Message: @example error (indent): Expected indentation of 0 spaces but found 1.

/**
 * @example test() // eslint-disable-line semi
 */
function quux () {}
// Settings: {"jsdoc":{"eslintrcForExamples":false,"noDefaultExampleRules":true,"reportUnusedDisableDirectives":true}}
// Message: @example error: Unused eslint-disable directive (no problems were reported from 'semi').

/**
 * @example
 test() // eslint-disable-line semi
 */
function quux () {}
// Settings: {"jsdoc":{"allowInlineConfig":false,"baseConfig":{"rules":{"semi":["error","always"]}},"eslintrcForExamples":false,"noDefaultExampleRules":true}}
// Message: @example error (semi): Missing semicolon.

The following patterns are not considered problems:

/**
 * @example ```js
 alert('hello');
 ```
 */
function quux () {

}
// Settings: {"jsdoc":{"baseConfig":{"rules":{"semi":["error","always"]}},"eslintrcForExamples":false,"exampleCodeRegex":"```js([\\s\\S]*)```"}}

/**
 * @example
 * // arbitrary example content
 */
function quux () {

}
// Settings: {"jsdoc":{"eslintrcForExamples":false}}

/**
 * @example
 * quux(); // does something useful
 */
function quux () {

}
// Settings: {"jsdoc":{"baseConfig":{"rules":{"no-undef":["error"]}},"eslintrcForExamples":false,"noDefaultExampleRules":false}}

/**
 * @example quux();
 */
function quux () {

}
// Settings: {"jsdoc":{"baseConfig":{"rules":{"indent":["error"]}},"eslintrcForExamples":false,"noDefaultExampleRules":false}}

/**
 * @example <caption>Valid usage</caption>
 * quux(); // does something useful
 *
 * @example <caption>Invalid usage</caption>
 * quux('random unwanted arg'); // results in an error
 */
function quux () {

}
// Settings: {"jsdoc":{"captionRequired":true,"eslintrcForExamples":false}}

/**
 * @example test() // eslint-disable-line semi
 */
function quux () {}
// Settings: {"jsdoc":{"eslintrcForExamples":false,"noDefaultExampleRules":true,"reportUnusedDisableDirectives":false}}

/**
 * @example
 test() // eslint-disable-line semi
 */
function quux () {}
// Settings: {"jsdoc":{"allowInlineConfig":true,"baseConfig":{"rules":{"semi":["error","always"]}},"eslintrcForExamples":false,"noDefaultExampleRules":true}}

check-indentation

Reports invalid padding inside JSDoc block.

||| |---|---| |Context|ArrowFunctionExpression, FunctionDeclaration, FunctionExpression| |Tags|N/A|

The following patterns are considered problems:

/**
 * foo
 *
 * @param bar
 *  baz
 */
function quux () {

}
// Message: There must be no indentation.

The following patterns are not considered problems:

/**
 * foo
 *
 * @param bar
 * baz
 */
function quux () {

}

check-param-names

Ensures that parameter names in JSDoc match those in the function declaration.

||| |---|---| |Context|ArrowFunctionExpression, FunctionDeclaration, FunctionExpression| |Tags|param|

The following patterns are considered problems:

/**
 * @param Foo
 */
function quux (foo = 'FOO') {

}
// Message: Expected @param names to be "foo". Got "Foo".

/**
 * @arg Foo
 */
function quux (foo = 'FOO') {

}
// Settings: {"jsdoc":{"tagNamePreference":{"param":"arg"}}}
// Message: Expected @arg names to be "foo". Got "Foo".

/**
 * @param Foo
 */
function quux (foo) {

}
// Message: Expected @param names to be "foo". Got "Foo".

/**
 * @param Foo.Bar
 */
function quux (foo) {

}
// Message: @param path declaration ("Foo.Bar") appears before any real parameter.

/**
 * @param foo
 * @param Foo.Bar
 */
function quux (foo) {

}
// Message: @param path declaration ("Foo.Bar") root node name ("Foo") does not match previous real parameter name ("foo").

/**
 * @param foo
 * @param foo.bar
 * @param bar
 */
function quux (bar, foo) {

}
// Message: Expected @param names to be "bar, foo". Got "foo, bar".

/**
 * @param foo
 * @param bar
 */
function quux (foo) {

}
// Message: @param "bar" does not match an existing function parameter.

/**
 * @param foo
 * @param foo
 */
function quux (foo) {

}
// Message: Duplicate @param "foo"

/**
 * @param foo
 * @param foo
 */
function quux (foo, bar) {

}
// Message: Duplicate @param "foo"

/**
 * @param foo
 * @param foo
 */
function quux (foo, foo) {

}
// Message: Duplicate @param "foo"

The following patterns are not considered problems:

/**
 *
 */
function quux (foo) {

}

/**
 * @param foo
 */
function quux (foo) {

}

/**
 * @param foo
 * @param bar
 */
function quux (foo, bar) {

}

/**
 * @param foo
 * @param bar
 */
function quux (foo, bar, baz) {

}

/**
 * @param foo
 * @param foo.foo
 * @param bar
 */
function quux (foo, bar) {

}

/**
 * @param args
 */
function quux (...args) {

}

/**
 * @param foo
 */
function quux ({a, b}) {

}

/**
 * @param foo
 */
function quux ({a, b} = {}) {

}

/**
 * @param foo
 */
function quux ([a, b] = []) {

}

/**
 * Assign the project to a list of employees.
 * @param {Object[]} employees - The employees who are responsible for the project.
 * @param {string} employees[].name - The name of an employee.
 * @param {string} employees[].department - The employee's department.
 */
function assign (employees) {

};

Deconstructing Function Parameter

eslint-plugin-jsdoc does not validate names of parameters in function deconstruction, e.g.

/**
 * @param foo
 */
function quux ({
    a,
    b
}) {

}

{a, b} is an ObjectPattern AST type and does not have a name. Therefore, the associated parameter in JSDoc block can have any name.

Likewise for the pattern [a, b] which is an ArrayPattern.

check-syntax

Reports against Google Closure Compiler syntax.

||| |---|---| |Context|ArrowFunctionExpression, FunctionDeclaration, FunctionExpression| |Tags|N/A|

The following patterns are considered problems:

/**
 * @param {string=} foo
 */
function quux (foo) {

}
// Message: Syntax should not be Google Closure Compiler style.

The following patterns are not considered problems:

/**
 * @param {string} [foo]
 */
function quux (foo) {

}

/**
 *
 */
function quux (foo) {

}

check-tag-names

Reports invalid block tag names.

Valid JSDoc 3 Block Tags are:

abstract
access
alias
async
augments
author
borrows
callback
class
classdesc
constant
constructs
copyright
default
deprecated
description
enum
event
example
exports
external
file
fires
function
generator
global
hideconstructor
ignore
implements
inheritdoc
inner
instance
interface
kind
lends
license
listens
member
memberof
memberof!
mixes
mixin
module
name
namespace
override
package
param
private
property
protected
public
readonly
requires
returns
see
since
static
summary
this
throws
todo
tutorial
type
typedef
variation
version
yields

||| |---|---| |Context|ArrowFunctionExpression, FunctionDeclaration, FunctionExpression| |Tags|N/A| |Settings|tagNamePreference, additionalTagNames|

The following patterns are considered problems:

/**
 * @Param
 */
function quux () {

}
// Message: Invalid JSDoc tag name "Param".

/**
 * @foo
 */
function quux () {

}
// Message: Invalid JSDoc tag name "foo".

/**
 * @arg foo
 */
function quux (foo) {

}
// Message: Invalid JSDoc tag (preference). Replace "arg" JSDoc tag with "param".

/**
 * @param foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"tagNamePreference":{"param":"arg"}}}
// Message: Invalid JSDoc tag (preference). Replace "param" JSDoc tag with "arg".

/**
 * @param foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"tagNamePreference":{"param":"parameter"}}}
// Message: Invalid JSDoc tag (preference). Replace "param" JSDoc tag with "parameter".

/**
 * @bar foo
 */
function quux (foo) {

}
// Message: Invalid JSDoc tag name "bar".

/**
 * @baz @bar foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"additionalTagNames":{"customTags":["bar"]}}}
// Message: Invalid JSDoc tag name "baz".

/**
 * @bar
 * @baz
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"additionalTagNames":{"customTags":["bar"]}}}
// Message: Invalid JSDoc tag name "baz".

The following patterns are not considered problems:

/**
 * @param foo
 */
function quux (foo) {

}

/**
 * @memberof! foo
 */
function quux (foo) {

}

/**
 * @arg foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"tagNamePreference":{"param":"arg"}}}

/**
 * @bar foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"additionalTagNames":{"customTags":["bar"]}}}

/**
 * @baz @bar foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"additionalTagNames":{"customTags":["baz","bar"]}}}

/** 
 * @abstract
 * @access
 * @alias
 * @augments
 * @author
 * @borrows
 * @callback
 * @class
 * @classdesc
 * @constant
 * @constructs
 * @copyright
 * @default
 * @deprecated
 * @description
 * @enum
 * @event
 * @example
 * @exports
 * @external
 * @file
 * @fires
 * @function
 * @global
 * @ignore
 * @implements
 * @inheritdoc
 * @inner
 * @instance
 * @interface
 * @kind
 * @lends
 * @license
 * @listens
 * @member
 * @memberof
 * @memberof!
 * @mixes
 * @mixin
 * @module
 * @name
 * @namespace
 * @override
 * @param
 * @private
 * @property
 * @protected
 * @public
 * @readonly
 * @requires
 * @returns
 * @see
 * @since
 * @static
 * @summary
 * @this
 * @throws
 * @todo
 * @tutorial
 * @type
 * @typedef
 * @variation
 * @version
 */
function quux (foo) {}

check-types

Reports invalid types.

By default, ensures that the casing of native types is the same as in this list:

undefined
null
boolean
number
string
object
Array
Function
Date
RegExp

Options

check-types allows one option:

An option object:
- with the key noDefaults to insist that only the supplied option type map is to be used, and that the default preferences (such as "string" over "String") will not be enforced.
- with the key unifyParentAndChildTypeChecks which will treat settings.jsdoc.preferredTypes keys such as SomeType as matching not only child types such as an unadorned SomeType but also SomeType<aChildType>, SomeType.<aChildType>, or if SomeType is Array (or []), it will match aChildType[]. If this is false or unset, the former format will only apply to types which are not parent types/unions whereas the latter formats will only apply for parent types/unions. The special types [], .<> (or .), and <> act only as parent types (and will not match a bare child type such as Array even when unified, though, as mentioned, Array will match say string[] or Array.<string> when unified). The special type * is only a child type. Note that there is no detection of parent and child type together, e.g., you cannot specify preferences for string[] specifically as distinct from say number[], but you can target both with [] or the child types number or string.

See also the documentation on settings.jsdoc.preferredTypes which impacts the behavior of check-types.

Why not capital case everything?

Why are boolean, number and string exempt from starting with a capital letter? Let's take string as an example. In Javascript, everything is an object. The string Object has prototypes for string functions such as .toUpperCase().

Fortunately we don't have to write new String() everywhere in our code. Javascript will automatically wrap string primitives into string Objects when we're applying a string function to a string primitive. This way the memory footprint is a tiny little bit smaller, and the GC has less work to do.

So in a sense, there two types of strings in Javascript; {string} literals, also called primitives and {String} Objects. We use the primitives because it's easier to write and uses less memory. {String} and {string} are technically both valid, but they are not the same.

new String('lard') // String {0: "l", 1: "a", 2: "r", 3: "d", length: 4}
'lard' // "lard"
new String('lard') === 'lard' // false

To make things more confusing, there are also object literals and object Objects. But object literals are still static Objects and object Objects are instantiated Objects. So an object primitive is still an object Object.

However, Object.create(null) objects are not instanceof Object, however, so in the case of this Object we lower-case to indicate possible support for these objects.

Basically, for primitives, we want to define the type as a primitive, because that's what we use in 99.9% of cases. For everything else, we use the type rather than the primitive. Otherwise it would all just be {object}.

In short: It's not about consistency, rather about the 99.9% use case. (And some functions might not even support the objects if they are checking for identity.)

type name | typeof | check-types | testcase --|--|--|-- Array | object | Array | ([]) instanceof Array -> true Function | function | function | (function f () {}) instanceof Function -> true Date | object | Date | (new Date()) instanceof Date -> true RegExp | object | RegExp | (new RegExp(/.+/)) instanceof RegExp -> true Object | object | object | ({}) instanceof Object -> true but Object.create(null) instanceof Object -> false Boolean | boolean | boolean | (true) instanceof Boolean -> false Number | number | number | (41) instanceof Number -> false String | string | string | ("test") instanceof String -> false

||| |---|---| |Context|ArrowFunctionExpression, FunctionDeclaration, FunctionExpression| |Tags|class, constant, enum, implements, member, module, namespace, param, property, returns, throws, type, typedef, yields| |Aliases|constructor, const, var, arg, argument, prop, return, exception| |Closure-only|package, private, protected, public, static| |Options|noDefaults, unifyParentAndChildTypeChecks| |Settings|preferredTypes|

The following patterns are considered problems:

/**
 * @param {Number} foo
 */
function quux (foo) {

}
// Message: Invalid JSDoc @param "foo" type "Number"; prefer: "number".

/**
 * @arg {Number} foo
 */
function quux (foo) {

}
// Message: Invalid JSDoc @arg "foo" type "Number"; prefer: "number".

/**
 * @returns {Number} foo
 * @throws {Number} foo
 */
function quux () {

}
// Message: Invalid JSDoc @returns type "Number"; prefer: "number".

/**
 * @param {(Number|string|Boolean)=} foo
 */
function quux (foo, bar, baz) {

}
// Message: Invalid JSDoc @param "foo" type "Number"; prefer: "number".

/**
 * @param {Array.<Number|String>} foo
 */
function quux (foo, bar, baz) {

}
// Message: Invalid JSDoc @param "foo" type "Number"; prefer: "number".

/**
 * @param {(Number|String)[]} foo
 */
function quux (foo, bar, baz) {

}
// Message: Invalid JSDoc @param "foo" type "Number"; prefer: "number".

/**
 * @param {abc} foo
 */
function qux(foo) {
}
// Settings: {"jsdoc":{"preferredTypes":{"abc":"Abc","string":"Str"}}}
// Message: Invalid JSDoc @param "foo" type "abc"; prefer: "Abc".

/**
 * @param {abc} foo
 */
function qux(foo) {
}
// Settings: {"jsdoc":{"preferredTypes":{"abc":{"replacement":"Abc"},"string":"Str"}}}
// Message: Invalid JSDoc @param "foo" type "abc"; prefer: "Abc".

/**
 * @param {abc} foo
 */
function qux(foo) {
}
// Settings: {"jsdoc":{"preferredTypes":{"abc":{"message":"Messed up JSDoc @{{tagName}}{{tagValue}} type \"{{badType}}\"; prefer: \"{{replacement}}\".","replacement":"Abc"},"string":"Str"}}}
// Message: Messed up JSDoc @param "foo" type "abc"; prefer: "Abc".

/**
 * @param {abc} foo
 * @param {cde} bar
 * @param {object} baz
 */
function qux(foo, bar, baz) {
}
// Settings: {"jsdoc":{"preferredTypes":{"abc":{"message":"Messed up JSDoc @{{tagName}}{{tagValue}} type \"{{badType}}\"; prefer: \"{{preferredType}}\".","replacement":"Abc"},"cde":{"message":"More messed up JSDoc @{{tagName}}{{tagValue}} type \"{{badType}}\"; prefer: \"{{preferredType}}\".","replacement":"Cde"},"object":"Object"}}}
// Message: Messed up JSDoc @param "foo" type "abc"; prefer: "Abc".

/**
 * @param {abc} foo
 */
function qux(foo) {
}
// Settings: {"jsdoc":{"preferredTypes":{"abc":{"message":"Messed up JSDoc @{{tagName}}{{tagValue}} type \"{{badType}}\".","replacement":false},"string":"Str"}}}
// Message: Messed up JSDoc @param "foo" type "abc".

/**
 * @param {abc} foo
 */
function qux(foo) {
}
// Settings: {"jsdoc":{"preferredTypes":{"abc":{"message":"Messed up JSDoc @{{tagName}}{{tagValue}} type \"{{badType}}\"."},"string":"Str"}}}
// Message: Messed up JSDoc @param "foo" type "abc".

/**
 * @param {abc} foo
 * @param {Number} bar
 */
function qux(foo, bar) {
}
// Settings: {"jsdoc":{"preferredTypes":{"abc":"Abc","string":"Str"}}}
// Options: [{"noDefaults":true}]
// Message: Invalid JSDoc @param "foo" type "abc"; prefer: "Abc".

/**
 * @param {abc} foo
 * @param {Number} bar
 */
function qux(foo, bar) {
}
// Settings: {"jsdoc":{"preferredTypes":{"abc":"Abc","string":"Str"}}}
// Message: Invalid JSDoc @param "foo" type "abc"; prefer: "Abc".

/**
 * @param {abc} foo
 */
function qux(foo) {
}
// Settings: {"jsdoc":{"preferredTypes":{"abc":false,"string":"Str"}}}
// Message: Invalid JSDoc @param "foo" type "abc".

/**
 * @param {abc} foo
 */
function qux(foo) {
}
// Settings: {"jsdoc":{"preferredTypes":{"abc":false}}}
// Message: Invalid JSDoc @param "foo" type "abc".

/**
 * @param {*} baz
 */
function qux(baz) {
}
// Settings: {"jsdoc":{"preferredTypes":{"*":false,"abc":"Abc","string":"Str"}}}
// Message: Invalid JSDoc @param "baz" type "*".

/**
 * @param {*} baz
 */
function qux(baz) {
}
// Settings: {"jsdoc":{"preferredTypes":{"*":"aaa","abc":"Abc","string":"Str"}}}
// Message: Invalid JSDoc @param "baz" type "*"; prefer: "aaa".

/**
 * @param {abc} foo
 * @param {Number} bar
 */
function qux(foo, bar) {
}
// Settings: {"jsdoc":{"preferredTypes":{"abc":"Abc","string":"Str"}}}
// Message: Invalid JSDoc @param "foo" type "abc"; prefer: "Abc".

/**
 * @param {Array} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"Array":"GenericArray"}}}
// Message: Invalid JSDoc @param "foo" type "Array"; prefer: "GenericArray".

/**
 * @param {Array} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"Array":"GenericArray","Array.<>":"GenericArray"}}}
// Message: Invalid JSDoc @param "foo" type "Array"; prefer: "GenericArray".

/**
 * @param {Array.<string>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"Array.<>":"GenericArray"}}}
// Message: Invalid JSDoc @param "foo" type "Array"; prefer: "GenericArray".

/**
 * @param {Array<string>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"Array<>":"GenericArray"}}}
// Message: Invalid JSDoc @param "foo" type "Array"; prefer: "GenericArray".

/**
 * @param {string[]} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"[]":"SpecialTypeArray"}}}
// Message: Invalid JSDoc @param "foo" type "[]"; prefer: "SpecialTypeArray".

/**
 * @param {string[]} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"[]":"SpecialTypeArray"}}}
// Options: [{"unifyParentAndChildTypeChecks":true}]
// Message: Invalid JSDoc @param "foo" type "[]"; prefer: "SpecialTypeArray".

/**
 * @param {string[]} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"Array":"SpecialTypeArray"}}}
// Options: [{"unifyParentAndChildTypeChecks":true}]
// Message: Invalid JSDoc @param "foo" type "Array"; prefer: "SpecialTypeArray".

/**
 * @param {object} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object":"GenericObject"}}}
// Message: Invalid JSDoc @param "foo" type "object"; prefer: "GenericObject".

/**
 * @param {object} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object":"GenericObject","object.<>":"GenericObject"}}}
// Message: Invalid JSDoc @param "foo" type "object"; prefer: "GenericObject".

/**
 * @param {object} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object":"GenericObject","object<>":"GenericObject"}}}
// Message: Invalid JSDoc @param "foo" type "object"; prefer: "GenericObject".

/**
 * @param {object.<string>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object.<>":"GenericObject"}}}
// Message: Invalid JSDoc @param "foo" type "object"; prefer: "GenericObject".

/**
 * @param {object<string>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object<>":"GenericObject"}}}
// Message: Invalid JSDoc @param "foo" type "object"; prefer: "GenericObject".

/**
 * @param {object.<string, number>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object.<>":"GenericObject"}}}
// Message: Invalid JSDoc @param "foo" type "object"; prefer: "GenericObject".

/**
 * @param {object<string, number>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object<>":"GenericObject"}}}
// Message: Invalid JSDoc @param "foo" type "object"; prefer: "GenericObject".

/**
 * @param {object.<string>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object":"GenericObject"}}}
// Options: [{"unifyParentAndChildTypeChecks":true}]
// Message: Invalid JSDoc @param "foo" type "object"; prefer: "GenericObject".

/**
 * @param {object<string>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object":"GenericObject"}}}
// Options: [{"unifyParentAndChildTypeChecks":true}]
// Message: Invalid JSDoc @param "foo" type "object"; prefer: "GenericObject".

/**
 * @param {object} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object":"GenericObject"}}}
// Options: [{"unifyParentAndChildTypeChecks":true}]
// Message: Invalid JSDoc @param "foo" type "object"; prefer: "GenericObject".

/**
 * @param {object} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object":false}}}
// Options: [{"unifyParentAndChildTypeChecks":true}]
// Message: Invalid JSDoc @param "foo" type "object".

/**
 * @param {object} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object":false}}}
// Message: Invalid JSDoc @param "foo" type "object".

/**
 * @param {object.<string, number>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object":"GenericObject"}}}
// Options: [{"unifyParentAndChildTypeChecks":true}]
// Message: Invalid JSDoc @param "foo" type "object"; prefer: "GenericObject".

/**
 * @param {object<string, number>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object":"GenericObject"}}}
// Options: [{"unifyParentAndChildTypeChecks":true}]
// Message: Invalid JSDoc @param "foo" type "object"; prefer: "GenericObject".

/**
 *
 * @param {string[][]} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"[]":"Array."}}}
// Message: Invalid JSDoc @param "foo" type "[]"; prefer: "Array.".

/**
 *
 * @param {string[][]} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"[]":"Array.<>"}}}
// Message: Invalid JSDoc @param "foo" type "[]"; prefer: "Array.<>".

/**
 *
 * @param {string[][]} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"[]":"Array<>"}}}
// Message: Invalid JSDoc @param "foo" type "[]"; prefer: "Array<>".

/**
 *
 * @param {object.<string, object.<string, string>>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object.":"Object"}}}
// Message: Invalid JSDoc @param "foo" type "object"; prefer: "Object".

/**
 *
 * @param {object.<string, object.<string, string>>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object.":"Object<>"}}}
// Message: Invalid JSDoc @param "foo" type "object"; prefer: "Object<>".

/**
 *
 * @param {object<string, object<string, string>>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object<>":"Object."}}}
// Message: Invalid JSDoc @param "foo" type "object"; prefer: "Object.".

/**
 *
 * @param {Array.<Array.<string>>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"Array.":"[]"}}}
// Message: Invalid JSDoc @param "foo" type "Array"; prefer: "[]".

/**
 *
 * @param {Array.<Array.<string>>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"Array.":"Array<>"}}}
// Message: Invalid JSDoc @param "foo" type "Array"; prefer: "Array<>".

/**
 *
 * @param {Array.<Array.<string>>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"Array.":"<>"}}}
// Message: Invalid JSDoc @param "foo" type "Array"; prefer: "<>".

/**
 *
 * @param {Array.<MyArray.<string>>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"Array.":"<>"}}}
// Message: Invalid JSDoc @param "foo" type "Array"; prefer: "<>".

/**
 *
 * @param {Array.<MyArray.<string>>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"MyArray.":"<>"}}}
// Message: Invalid JSDoc @param "foo" type "MyArray"; prefer: "<>".

/**
 *
 * @param {Array<Array<string>>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"<>":"Array."}}}
// Message: Invalid JSDoc @param "foo" type "Array"; prefer: "Array.".

/**
 *
 * @param {Array<Array<string>>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"Array":"Array."}}}
// Options: [{"unifyParentAndChildTypeChecks":true}]
// Message: Invalid JSDoc @param "foo" type "Array"; prefer: "Array.".

/**
 *
 * @param {Array<Array<string>>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"<>":"[]"}}}
// Message: Invalid JSDoc @param "foo" type "Array"; prefer: "[]".

The following patterns are not considered problems:

/**
 * @param {number} foo
 * @param {Bar} bar
 * @param {*} baz
 */
function quux (foo, bar, baz) {

}

/**
 * @arg {number} foo
 * @arg {Bar} bar
 * @arg {*} baz
 */
function quux (foo, bar, baz) {

}

/**
 * @param {(number|string|boolean)=} foo
 */
function quux (foo, bar, baz) {

}

/**
 * @param {typeof bar} foo
 */
function qux(foo) {
}

/**
 * @param {import('./foo').bar.baz} foo
 */
function qux(foo) {
}

/**
 * @param {(x: number, y: string) => string} foo
 */
function qux(foo) {
}

/**
 * @param {() => string} foo
 */
function qux(foo) {
}

/**
 * @returns {Number} foo
 * @throws {Number} foo
 */
function quux () {

}
// Options: [{"noDefaults":true}]

/**
 * @param {Object} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object":"Object"}}}

/**
 * @param {Array} foo
 */
function quux (foo) {

}

/**
 * @param {Array.<string>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"Array":"GenericArray"}}}

/**
 * @param {Array<string>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"Array":"GenericArray"}}}

/**
 * @param {string[]} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"Array":"SpecialTypeArray","Array.<>":"SpecialTypeArray","Array<>":"SpecialTypeArray"}}}

/**
 * @param {string[]} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"Array.<>":"SpecialTypeArray","Array<>":"SpecialTypeArray"}}}
// Options: [{"unifyParentAndChildTypeChecks":true}]

/**
 * @param {Array} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"[]":"SpecialTypeArray"}}}

/**
 * @param {Array} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"[]":"SpecialTypeArray"}}}
// Options: [{"unifyParentAndChildTypeChecks":true}]

/**
 * @param {Array} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"Array.<>":"GenericArray"}}}

/**
 * @param {Array} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"Array<>":"GenericArray"}}}

/**
 * @param {object} foo
 */
function quux (foo) {

}

/**
 * @param {object.<string>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object":"GenericObject"}}}

/**
 * @param {object<string>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object":"GenericObject"}}}

/**
 * @param {object.<string, number>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object":"GenericObject"}}}

/**
 * @param {object<string, number>} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object":"GenericObject"}}}

/**
 * @param {object} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object.<>":"GenericObject"}}}

/**
 * @param {object} foo
 */
function quux (foo) {

}
// Settings: {"jsdoc":{"preferredTypes":{"object<>":"GenericObject"}}}

implements-on-classes

Reports an issue with any non-constructor function using @implements.

Constructor functions, whether marked with @class, @constructs, or being an ES6 class constructor, will not be flagged.

||| |---|---| |Context|ArrowFunctionExpression, FunctionDeclaration, FunctionExpression| |Tags|implements (prevented)|

The following patterns are considered problems:

/**
 * @implements {SomeClass}
 */
function quux () {

}
// Message: @implements used on a non-constructor function

The following patterns are not considered problems:

/**
 * @implements {SomeClass}
 * @class
 */
function quux () {

}

/**
 * @implements {SomeClass}
 * @constructor
 */
function quux () {

}

/**
 *
 */
class quux {
  /**
   * @implements {SomeClass}
   */
  constructor () {

  }
}

/**
 *
 */
function quux () {

}

match-description

Enforces a regular expression pattern on descriptions.

The default is this basic expression to match English sentences (Support for Unicode upper case may be added in a future version when it can be handled by our supported Node versions):

^([A-Z]|[`\\d_])([\\s\\S]*[.?!`])?$

You can supply your own expression passing a matchDescription string on the options object.

{
  'jsdoc/match-description': ['error', {matchDescription: '[A-Z].*\\.'}]
}

If you want different regular expressions to apply to tags, you may use the tags option object:

{
  'jsdoc/match-description': ['error', {tags: {
    param: '\\- [A-Z].*\\.',
    returns: '[A-Z].*\\.'
  }}]
}

In place of a string, you can also add true to indicate that a particular tag should be linted with the matchDescription value (or the default).

{
  'jsdoc/match-description': ['error', {tags: {
    param: true,
    returns: true
  }}]
}

By default, only the main function description is linted.

||| |---|---| |Context|ArrowFunctionExpression, FunctionDeclaration, FunctionExpression| |Tags|N/A by default but see tags options| |Settings|| |Options|tags (allows for 'param', 'arg', 'argument', 'returns', 'return'), matchDescription|

The following patterns are considered problems:

/**
 * foo.
 */
function quux () {

}
// Message: JSDoc description does not satisfy the regex pattern.

/**
 * Foo)
 */
function quux () {

}
// Message: JSDoc description does not satisfy the regex pattern.

/**
 * тест.
 */
function quux () {

}
// Options: [{"matchDescription":"[А-Я]+."}]
// Message: JSDoc description does not satisfy the regex pattern.

/**
 * Foo
 */
function quux () {

}
// Message: JSDoc description does not satisfy the regex pattern.

/**
 * Foo.
 *
 * @param foo foo.
 */
function quux (foo) {

}
// Options: [{"tags":{"param":true}}]
// Message: JSDoc description does not satisfy the regex pattern.

/**
 * Foo.
 *
 * @param foo bar
 */
function quux (foo) {

}
// Options: [{"tags":{"param":true}}]
// Message: JSDoc description does not satisfy the regex pattern.

/**
 * {@see Foo.bar} buz
 */
function quux (foo) {

}
// Message: JSDoc description does not satisfy the regex pattern.

/**
 * Foo.
 *
 * @returns {number} foo
 */
function quux (foo) {

}
// Options: [{"tags":{"returns":true}}]
// Message: JSDoc description does not satisfy the regex pattern.

/**
 * Foo.
 *
 * @returns foo.
 */
function quux (foo) {

}
// Options: [{"tags":{"returns":true}}]
// Message: JSDoc description does not satisfy the regex pattern.

/**
 * lorem ipsum dolor sit amet, consectetur adipiscing elit. pellentesque elit diam,
 * iaculis eu dignissim sed, ultrices sed nisi. nulla at ligula auctor, consectetur neque sed,
 * tincidunt nibh. vivamus sit amet vulputate ligula. vivamus interdum elementum nisl,
 * vitae rutrum tortor semper ut. morbi porta ante vitae dictum fermentum.
 * proin ut nulla at quam convallis gravida in id elit. sed dolor mauris, blandit quis ante at,
 * consequat auctor magna. duis pharetra purus in porttitor mollis.
 */
function longDescription (foo) {

}
// Message: JSDoc description does not satisfy the regex pattern.

/**
 * @arg {number} foo - Foo
 */
function quux (foo) {

}
// Options: [{"tags":{"arg":true}}]
// Message: JSDoc description does not satisfy the regex pattern.

/**
 * @argument {number} foo - Foo
 */
function quux (foo) {

}
// Options: [{"tags":{"argument":true}}]
// Message: JSDoc description does not satisfy the regex pattern.

/**
 * @return {number} foo
 */
function quux (foo) {

}
// Options: [{"tags":{"return":true}}]
// Message: JSDoc description does not satisfy the regex pattern.

/**
 * Returns bar.
 *
 * @return {number} bar
 */
function quux (foo) {

}
// Options: [{"tags":{"return":true}}]
// Message: JSDoc description does not satisfy the regex pattern.

/**
 * @param notRet
 * @returns Тест.
 */
function quux () {

}
// Options: [{"tags":{"param":"[А-Я]+."}}]
// Message: JSDoc description does not satisfy the regex pattern.

The following patterns are not considered problems:

/**
 * @param foo - Foo.
 */
function quux () {

}
// Options: [{"tags":{"param":true}}]

/**
 * Foo.
 */
function quux () {

}

/**
 * Foo.
 * Bar.
 */
function quux () {

}

/**
 * Foo.
 *
 * Bar.
 */
function quux () {

}

/**
 * Тест.
 */
function quux () {

}
// Options: [{"matchDescription":"[А-Я]+."}]

/**
 * @param notRet
 * @returns Тест.
 */
function quux () {

}
// Options: [{"tags":{"returns":"[А-Я]+."}}]

/**
 * Foo
 * bar.
 */
function quux () {

}

/**
 * @returns Foo bar.
 */
function quux () {

}
// Options: [{"tags":{"returns":true}}]

/**
 * Foo. {@see Math.sin}.
 */
function quux () {

}

/**
 * Foo {@see Math.sin} bar.
 */
function quux () {

}

/**
 * Foo?
 *
 * Bar!
 *
 * Baz:
 *   1. Foo.
 *   2. Bar.
 */
function quux () {

}

/**
 * Hello:
 * World.
 */
function quux () {

}

/**
 * Hello: world.
 */
function quux () {

}

/**
 * Foo
 * Bar.
 */
function quux () {

}

/**
 * Foo.
 *
 * foo.
 */
function quux () {

}

newline-after-description

Enforces a consistent padding of the block description.

This rule takes one argument. If it is "always" then a problem is raised when there is a newline after the description. If it is "never" then a problem is raised when there is no newline after the description. The default value is "always".

||| |---|---| |Context|ArrowFunctionExpression, FunctionDeclaration, FunctionExpression| |Tags|N/A|

The following patterns are considered problems:

/**
 * Foo.
 *
 * Foo.
 * @foo
 */
function quux () {

}
// Options: ["always"]
// Message: There must be a newline after the description of the JSDoc block.

/**
 * Bar.
 *
 * Bar.
 *
 * @bar
 */
function quux () {

}
// Options: ["never"]
// Message: There must be no newline after the description of the JSDoc block.

The following patterns are not considered problems:

/**
 * Foo.
 */
function quux () {

}
// Options: ["always"]

/**
 * Bar.
 */
function quux () {

Published

Vulnerabilities

Links

Maintainers

Keywords

Readme

eslint-plugin-jsdoc

Reference to jscs-jsdoc

Installation

Configuration

Settings

Allow @private to disable rules for that comment block

Exempting empty functions from require-jsdoc

Alias Preference

Additional Tag Names

@override/@augments/@extends/@implements Without Accompanying @param/@description/@example/@returns

Settings to Configure check-types and no-undefined-types

Settings to Configure valid-types

Settings to Configure require-returns

Settings to Configure require-example

Settings to Configure check-examples

Rules Disabled by Default Unless noDefaultExampleRules is Set to true

Rules

check-alignment

check-examples

check-indentation

check-param-names

Deconstructing Function Parameter

check-syntax

check-tag-names

check-types

Options

Why not capital case everything?

implements-on-classes

match-description

newline-after-description