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):
^\n?([A-Z`\\d_][\\s\\S]*[.?!`]\\s*)?$
Applies by default to the jsdoc block description and to the following tags:
@description/@desc@summary@file/@fileoverview/@overview@classdesc
In addition, the tags option (see below) may be used to match other tags.
The default (and all regex options) defaults to using (only) the u flag, so
to add your own flags, encapsulate your expression as a string, but like a
literal, e.g., /[A-Z].*\\./ui.
Note that / delimiters are optional, but necessary to add flags (besides
u).
Also note that the default or optional regular expressions is not
case-insensitive unless one opts in to add the i flag.
You can add the s flag if you want . to match newlines. Note, however,
that the trailing newlines of a description will not be matched.
You can supply your own expression to override the default, passing a
matchDescription string on the options object.
{
'jsdoc/match-description': ['error', {matchDescription: '[A-Z].*\\.'}]
}You may provide a custom default message by using the following format:
{
'jsdoc/match-description': ['error', {
message: 'The default description should begin with a capital letter.'
}]
}This can be overridden per tag or for the main block description by setting
message within tags or mainDescription, respectively.
If not set to false, will enforce that the following tags have at least
some content:
@copyright@example@see@todo
If you supply your own tag description for any of the above tags in tags,
your description will take precedence.
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
}}]
}Alternatively, you may supply an object with a message property to indicate
the error message for that tag.
{
'jsdoc/match-description': ['error', {tags: {
param: {message: 'Begin with a hyphen', match: '\\- [A-Z].*\\.'},
returns: {message: 'Capitalize for returns (the default)', match: true}
}}]
}The tags @param/@arg/@argument and @property/@prop will be properly
parsed to ensure that the matched "description" text includes only the text
after the name.
All other tags will treat the text following the tag name, a space, and
an optional curly-bracketed type expression (and another space) as part of
its "description" (e.g., for @returns {someType} some description, the
description is some description while for @some-tag xyz, the description
is xyz).
If you wish to override the main block description without changing the
default match-description (which can cascade to the tags with true),
you may use mainDescription:
{
'jsdoc/match-description': ['error', {
mainDescription: '[A-Z].*\\.',
tags: {
param: true,
returns: true
}
}]
}There is no need to add mainDescription: true, as by default, the main
block description (and only the main block description) is linted, though you
may disable checking it by setting it to false.
You may also provide an object with message:
{
'jsdoc/match-description': ['error', {
mainDescription: {
message: 'Capitalize first word of JSDoc block descriptions',
match: '[A-Z].*\\.'
},
tags: {
param: true,
returns: true
}
}]
}Set this to an array of strings representing the AST context (or an object with
context and comment properties) where you wish the rule to be applied.
(e.g., ClassDeclaration for ES6
classes). Overrides the default contexts (see below). Set to "any" if you
want the rule to apply to any jsdoc block throughout your files.
See the "AST and Selectors" section of our README for more on the expected format.
| Context | ArrowFunctionExpression, FunctionDeclaration, FunctionExpression; others when contexts option enabled |
| Tags | docblock and @description by default but more with tags |
| Aliases | @desc |
| Recommended | false |
| Settings | |
| Options | contexts, mainDescription, matchDescription, message, nonemptyTags, tags |
The following patterns are considered problems:
/**
* foo.
*/
const q = class {
}
// "jsdoc/match-description": ["error"|"warn", {"contexts":["ClassExpression"]}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* foo.
*/
const q = class {
}
// "jsdoc/match-description": ["error"|"warn", {"contexts":["ClassExpression"],"message":"Needs to begin with a capital letter and end with an end mark."}]
// Message: Needs to begin with a capital letter and end with an end mark.
/**
* foo.
*/
// "jsdoc/match-description": ["error"|"warn", {"contexts":["any"]}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* foo.
*/
// "jsdoc/match-description": ["error"|"warn", {"contexts":["any"]}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* foo.
*/
const q = {
};
// "jsdoc/match-description": ["error"|"warn", {"contexts":["ObjectExpression"]}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* 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 () {
}
// "jsdoc/match-description": ["error"|"warn", {"matchDescription":"[А-Я][А-я]+\\."}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* тест.
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"matchDescription":"[А-Я][А-я]+\\.","message":"Needs to begin with a capital letter and end with an end mark."}]
// Message: Needs to begin with a capital letter and end with an end mark.
/**
* Abc.
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"mainDescription":"[А-Я][А-я]+\\.","tags":{"param":true}}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* Abc.
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"mainDescription":{"match":"[А-Я][А-я]+\\.","message":"Needs to begin with a Cyrillic capital letter and end with a period."},"tags":{"param":true}}]
// Message: Needs to begin with a Cyrillic capital letter and end with a period.
/**
* Foo
*/
function quux () {
}
// Message: JSDoc description does not satisfy the regex pattern.
/**
* Foo.
*
* @param foo foo.
*/
function quux (foo) {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"param":true}}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* Foo.
*
* @template Abc, Def foo.
*/
function quux (foo) {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"template":true}}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* Foo.
*
* @prop foo foo.
*/
function quux (foo) {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"prop":true}}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* Foo.
*
* @summary foo.
*/
function quux () {
}
// Message: JSDoc description does not satisfy the regex pattern.
/**
* Foo.
*
* @author
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"author":".+"}}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* Foo.
*
* @x-tag
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"x-tag":".+"}}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* Foo.
*
* @description foo foo.
*/
function quux (foo) {
}
// Message: JSDoc description does not satisfy the regex pattern.
/**
* Foo
*
* @param foo foo.
*/
function quux (foo) {
}
// "jsdoc/match-description": ["error"|"warn", {"mainDescription":"^[a-zA-Z]*\\s*$","tags":{"param":true}}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* Foo
*
* @param foo foo.
*/
function quux (foo) {
}
// "jsdoc/match-description": ["error"|"warn", {"mainDescription":{"match":"^[a-zA-Z]*\\s*$","message":"Letters only"},"tags":{"param":{"match":true,"message":"Needs to begin with a capital letter and end with a period."}}}]
// Message: Needs to begin with a capital letter and end with a period.
/**
* Foo
*
* @param foo foo.
*/
function quux (foo) {
}
// "jsdoc/match-description": ["error"|"warn", {"mainDescription":false,"tags":{"param":true}}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* Foo.
*
* @param foo bar
*/
function quux (foo) {
}
// "jsdoc/match-description": ["error"|"warn", {"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) {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"returns":true}}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* Foo.
*
* @returns foo.
*/
function quux (foo) {
}
// "jsdoc/match-description": ["error"|"warn", {"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) {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"arg":true}}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* @argument {number} foo - Foo
*/
function quux (foo) {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"argument":true}}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* @return {number} foo
*/
function quux (foo) {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"return":true}}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* Returns bar.
*
* @return {number} bar
*/
function quux (foo) {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"return":true}}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* @param notRet
* @returns Тест.
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"param":"[А-Я][А-я]+\\."}}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* @description notRet
* @returns Тест.
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"description":"[А-Я][А-я]+\\."}}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* foo.
*/
class quux {
}
// "jsdoc/match-description": ["error"|"warn", {"contexts":["ClassDeclaration"]}]
// Message: JSDoc description does not satisfy the regex pattern.
class MyClass {
/**
* Abc
*/
myClassField = 1
}
// "jsdoc/match-description": ["error"|"warn", {"contexts":["PropertyDefinition"]}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* foo.
*/
interface quux {
}
// "jsdoc/match-description": ["error"|"warn", {"contexts":["TSInterfaceDeclaration"]}]
// Message: JSDoc description does not satisfy the regex pattern.
const myObject = {
/**
* Bad description
*/
myProp: true
};
// "jsdoc/match-description": ["error"|"warn", {"contexts":["Property"]}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* @param foo Foo bar
*/
function quux (foo) {
}
// Settings: {"jsdoc":{"tagNamePreference":{"description":false}}}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"param":true}}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* Foo bar
*/
function quux (foo) {
}
// Settings: {"jsdoc":{"tagNamePreference":{"description":false}}}
// Message: JSDoc description does not satisfy the regex pattern.
/**
* Description with extra new line
*
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"matchDescription":"[\\s\\S]*\\S$"}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
*
* This function does lots of things.
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"matchDescription":"^\\S[\\s\\S]*\\S$"}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
*
* @param
*/
// "jsdoc/match-description": ["error"|"warn", {"contexts":["any"],"matchDescription":"^\\S[\\s\\S]*\\S$"}]
// Message: JSDoc description does not satisfy the regex pattern.
/** Does something very important. */
function foo(): string;
// "jsdoc/match-description": ["error"|"warn", {"contexts":[{"comment":"JsdocBlock[endLine=0]"}],"matchDescription":"^\\S[\\s\\S]*\\S$"}]
// Message: JSDoc description does not satisfy the regex pattern.
/**
* @copyright
*/
function quux () {
}
// Message: JSDoc description must not be empty.The following patterns are not considered problems:
/**
*
*/
/**
*
*/
function quux () {
}
/**
* @param foo - Foo.
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"param":true}}]
/**
* Foo.
*/
function quux () {
}
/**
* Foo.
* Bar.
*/
function quux () {
}
/**
* Foo.
*
* Bar.
*/
function quux () {
}
/**
* Foo.
*
* Bar.
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"message":"This won't be shown"}]
/**
* Тест.
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"matchDescription":"[А-Я][А-я]+\\."}]
/**
* @param notRet
* @returns Тест.
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"returns":"[А-Я][А-я]+\\."}}]
/**
* @param notRet
* @description Тест.
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"description":"[А-Я][А-я]+\\."}}]
/**
* Foo
* bar.
*/
function quux () {
}
/**
* @returns Foo bar.
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"returns":true}}]
/**
* @returns {type1} Foo bar.
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"returns":true}}]
/**
* @description Foo bar.
*/
function quux () {
}
/**
* @description Foo
* bar.
* @param
*/
function quux () {
}
/** @description Foo bar. */
function quux () {
}
/**
* @description Foo
* bar.
*/
function quux () {
}
/**
* 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 () {
}
/**
* foo.
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"mainDescription":false}]
/**
* foo.
*/
class quux {
}
/**
* foo.
*/
class quux {
}
// "jsdoc/match-description": ["error"|"warn", {"mainDescription":true}]
class MyClass {
/**
* Abc.
*/
myClassField = 1
}
// "jsdoc/match-description": ["error"|"warn", {"contexts":["PropertyDefinition"]}]
/**
* Foo.
*/
interface quux {
}
// "jsdoc/match-description": ["error"|"warn", {"contexts":["TSInterfaceDeclaration"]}]
const myObject = {
/**
* Bad description
*/
myProp: true
};
// "jsdoc/match-description": ["error"|"warn", {"contexts":[]}]
/**
* foo.
*/
const q = class {
}
// "jsdoc/match-description": ["error"|"warn", {"contexts":[]}]
/**
* foo.
*/
const q = {
};
// "jsdoc/match-description": ["error"|"warn", {"contexts":[]}]
/**
* @deprecated foo.
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"param":true}}]
/**
* Foo.
*
* @summary Foo.
*/
function quux () {
}
/**
* Foo.
*
* @author Somebody
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"author":".+"}}]
/**
* Foo.
*
* @x-tag something
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"x-tag":".+"}}]
/**
* Foo.
*
* @prop foo Foo.
*/
function quux (foo) {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"prop":true}}]
/**
* @param foo Foo bar.
*/
function quux (foo) {
}
// Settings: {"jsdoc":{"tagNamePreference":{"description":false}}}
/**
*
*/
function quux () {
}
// Settings: {"jsdoc":{"tagNamePreference":{"description":false}}}
/**
* Foo.
*
* @template Abc, Def Foo.
*/
function quux (foo) {
}
// "jsdoc/match-description": ["error"|"warn", {"tags":{"template":true}}]
/**
* Enable or disable plugin.
*
* When enabling with this function, the script will be attached to the `document` if:.
* - the script runs in browser context.
* - the `document` doesn't have the script already attached.
* - the `loadScript` option is set to `true`.
* @param enabled `true` to enable, `false` to disable. Default: `true`.
*/
// "jsdoc/match-description": ["error"|"warn", {"contexts":["any"],"mainDescription":"/^[A-Z`-].*\\.$/us","matchDescription":"^([A-Z`-].*(\\.|:)|-\\s.*)$","tags":{"param":true,"returns":true}}]
/**
* @constructor
* @todo Ok.
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"mainDescription":false,"tags":{"todo":true}}]
/** Does something very important. */
function foo(): string;
// "jsdoc/match-description": ["error"|"warn", {"contexts":[{"comment":"JsdocBlock[endLine!=0]"}],"matchDescription":"^\\S[\\s\\S]*\\S$"}]
/**
* This is my favorite function, foo.
*
* @returns Nothing.
*/
function foo(): void;
// "jsdoc/match-description": ["error"|"warn", {"contexts":[{"comment":"JsdocBlock[endLine!=0]:not(:has(JsdocTag))"}],"matchDescription":"^\\S[\\s\\S]*\\S$"}]
/**
* @copyright
*/
function quux () {
}
// "jsdoc/match-description": ["error"|"warn", {"nonemptyTags":false}]