eslint-plugin-jsdoc

What is eslint-plugin-jsdoc?

The eslint-plugin-jsdoc package is a plugin for ESLint that provides linting rules for JSDoc comments. JSDoc is a markup language used to annotate JavaScript source code files. Using eslint-plugin-jsdoc, developers can ensure that their JSDoc comments are consistent and follow best practices.

What are eslint-plugin-jsdoc's main functionalities?

Check alignment

Ensures that JSDoc blocks are aligned properly.

/* eslint jsdoc/check-alignment: "error" */
/**
 * Function description.
 *
 * @param {string} name - The name of the person.
 * @return {string} - The greeting message.
 */
function greet(name) {
  return `Hello, ${name}!`;
}

Check indentation

Ensures that JSDoc blocks have consistent indentation.

/* eslint jsdoc/check-indentation: "error" */
/**
 * Function description.
 *
 * @param {string} name - The name of the person.
 * @return {string} - The greeting message.
 */
function greet(name) {
  return `Hello, ${name}!`;
}

Check types

Validates JSDoc comments for type correctness.

/* eslint jsdoc/check-types: "error" */
/**
 * Function description.
 *
 * @param {String} name - The name of the person.
 * @return {String} - The greeting message.
 */
function greet(name) {
  return `Hello, ${name}!`;
}

Require JSDoc

Requires JSDoc comments for certain nodes in the code.

/* eslint jsdoc/require-jsdoc: "error" */
/**
 * Function description.
 */
function greet(name) {
  return `Hello, ${name}!`;
}

Other packages similar to eslint-plugin-jsdoc

tsdoc

TSDoc is a documentation comment format used for TypeScript source files. It is similar to JSDoc but tailored for the TypeScript language, providing a standardized way to document TypeScript APIs. Unlike eslint-plugin-jsdoc, TSDoc does not provide linting rules but focuses on the comment format itself.

documentation

The 'documentation' package is a documentation generator that uses JSDoc comments to produce documentation for JavaScript code. It is similar to eslint-plugin-jsdoc in that it processes JSDoc comments, but its primary purpose is to generate documentation rather than lint code.

typedoc

TypeDoc is a documentation generator for TypeScript projects. It reads TypeScript source files and JSDoc comments to produce documentation. While eslint-plugin-jsdoc focuses on linting JSDoc comments, TypeDoc uses them to generate documentation websites or markdown files.

README

eslint-plugin-jsdoc

JSDoc linting rules for ESLint.

• eslint-plugin-jsdoc
  • Installation
  • Configuration
    • Flat config
    • eslintrc
  • Options
  • Settings
  • Advanced
  • Rules

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

Flat config

import jsdoc from 'eslint-plugin-jsdoc';

const config = [
  // configuration included in plugin
  jsdoc.configs['flat/recommended'],
  // other configuration objects...
  {
    files: ['**/*.js'],
    plugins: {
      jsdoc,
    },
    rules: {
      'jsdoc/require-description': 'warn'
    }
  }
];

export default config;

eslintrc

Add plugins section to .eslintrc.* 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-access": 1, // Recommended
        "jsdoc/check-alignment": 1, // Recommended
        "jsdoc/check-examples": 1,
        "jsdoc/check-indentation": 1,
        "jsdoc/check-line-alignment": 1,
        "jsdoc/check-param-names": 1, // Recommended
        "jsdoc/check-property-names": 1, // Recommended
        "jsdoc/check-syntax": 1,
        "jsdoc/check-tag-names": 1, // Recommended
        "jsdoc/check-types": 1, // Recommended
        "jsdoc/check-values": 1, // Recommended
        "jsdoc/empty-tags": 1, // Recommended
        "jsdoc/implements-on-classes": 1, // Recommended
        "jsdoc/informative-docs": 1,
        "jsdoc/match-description": 1,
        "jsdoc/multiline-blocks": 1, // Recommended
        "jsdoc/no-bad-blocks": 1,
        "jsdoc/no-blank-block-descriptions": 1,
        "jsdoc/no-defaults": 1,
        "jsdoc/no-missing-syntax": 1,
        "jsdoc/no-multi-asterisks": 1, // Recommended
        "jsdoc/no-restricted-syntax": 1,
        "jsdoc/no-types": 1,
        "jsdoc/no-undefined-types": 1, // Recommended
        "jsdoc/require-asterisk-prefix": 1,
        "jsdoc/require-description": 1,
        "jsdoc/require-description-complete-sentence": 1,
        "jsdoc/require-example": 1,
        "jsdoc/require-file-overview": 1,
        "jsdoc/require-hyphen-before-param-description": 1,
        "jsdoc/require-jsdoc": 1, // Recommended
        "jsdoc/require-param": 1, // Recommended
        "jsdoc/require-param-description": 1, // Recommended
        "jsdoc/require-param-name": 1, // Recommended
        "jsdoc/require-param-type": 1, // Recommended
        "jsdoc/require-property": 1, // Recommended
        "jsdoc/require-property-description": 1, // Recommended
        "jsdoc/require-property-name": 1, // Recommended
        "jsdoc/require-property-type": 1, // Recommended
        "jsdoc/require-returns": 1, // Recommended
        "jsdoc/require-returns-check": 1, // Recommended
        "jsdoc/require-returns-description": 1, // Recommended
        "jsdoc/require-returns-type": 1, // Recommended
        "jsdoc/require-throws": 1,
        "jsdoc/require-yields": 1, // Recommended
        "jsdoc/require-yields-check": 1, // Recommended
        "jsdoc/sort-tags": 1,
        "jsdoc/tag-lines": 1, // Recommended
        "jsdoc/valid-types": 1 // Recommended
    }
}

Or you can simply add the following to .eslintrc.*, which enables the rules commented above as "recommended":

{
  "extends": ["plugin:jsdoc/recommended"]
}

You can then selectively add to or override the recommended rules.

Alternatively, if you wish to have all linting issues reported as failing errors, you may use the "recommended-error" config:

{
  "extends": ["plugin:jsdoc/recommended-error"]
}

If you plan to use TypeScript syntax (and not just "typescript" mode to indicate the JSDoc flavor is TypeScript), you can use:

{
  "extends": ["plugin:jsdoc/recommended-typescript"]
}

...or to report with failing errors instead of mere warnings:

{
  "extends": ["plugin:jsdoc/recommended-typescript-error"]
}

If you are not using TypeScript syntax (your source files are still .js files) but you are using the TypeScript flavor within JSDoc (i.e., the default "typescript" mode in eslint-plugin-jsdoc) and you are perhaps using allowJs and checkJs options of TypeScript's tsconfig.json), you may use:

{
  "extends": ["plugin:jsdoc/recommended-typescript-flavor"]
}

...or to report with failing errors instead of mere warnings:

{
  "extends": ["plugin:jsdoc/recommended-typescript-flavor-error"]
}

Options

Rules may, as per the ESLint user guide, have their own individual options. In eslint-plugin-jsdoc, a few options, such as, exemptedBy and contexts, may be used across different rules.

eslint-plugin-jsdoc options, if present, are generally in the form of an object supplied as the second argument in an array after the error level (any exceptions to this format are explained within that rule's docs).

// `.eslintrc.js`
{
  rules: {
    'jsdoc/require-example': [
        // The Error level should be `error`, `warn`, or `off` (or 2, 1, or 0)
        'error',
        // The options vary by rule, but are generally added to an options
        //  object as follows:
        {
          checkConstructors: true,
          exemptedBy: ['type']
        }
    ]
  }
}

Settings

See Settings.

Advanced

See Advanced.

Rules

Problems reported by rules which have a wrench :wrench: below can be fixed automatically by running ESLint on the command line with --fix option.

Note that a number of fixable rules have an enableFixer option which can be set to false to disable the fixer (or in the case of check-param-names, check-property-names, and no-blank-blocks, set to true to enable a non-default-recommended fixer).

recommended	fixable	rule	description
:heavy_check_mark:		check-access	Enforces valid @access tags
:heavy_check_mark:	:wrench:	check-alignment	Enforces alignment of JSDoc block asterisks
		check-examples	Linting of JavaScript within @example
		check-indentation	Checks for invalid padding inside JSDoc blocks
	:wrench:	check-line-alignment	Reports invalid alignment of JSDoc block lines.
:heavy_check_mark:	:wrench:	check-param-names	Checks for dupe @param names, that nested param names have roots, and that parameter names in function declarations match jsdoc param names.
:heavy_check_mark:	:wrench:	check-property-names	Checks for dupe @property names, that nested property names have roots
		check-syntax	Reports use against current mode (currently only prohibits Closure-specific syntax)
:heavy_check_mark:	:wrench:	check-tag-names	Reports invalid jsdoc (block) tag names
:heavy_check_mark:	:wrench:	check-types	Reports types deemed invalid (customizable and with defaults, for preventing and/or recommending replacements)
:heavy_check_mark:		check-values	Checks for expected content within some miscellaneous tags (@version, @since, @license, @author)
		convert-to-jsdoc-comments	Converts line and block comments preceding or following specified nodes into JSDoc comments
:heavy_check_mark:	:wrench:	empty-tags	Checks tags that are expected to be empty (e.g., @abstract or @async), reporting if they have content
:heavy_check_mark:		implements-on-classes	Prohibits use of @implements on non-constructor functions (to enforce the tag only being used on classes/constructors)
		informative-docs	Reports on JSDoc texts that serve only to restate their attached name.
		match-description	Defines customizable regular expression rules for your tag descriptions
	:wrench:	match-name	Reports the name portion of a JSDoc tag if matching or not matching a given regular expression
:heavy_check_mark:	:wrench:	multiline-blocks	Controls how and whether jsdoc blocks can be expressed as single or multiple line blocks
	:wrench:	no-bad-blocks	This rule checks for multi-line-style comments which fail to meet the criteria of a jsdoc block
	:wrench:	no-blank-block-descriptions	If tags are present, this rule will prevent empty lines in the block description. If no tags are present, this rule will prevent extra empty lines in the block description.
	:wrench:	no-blank-blocks	Reports and optionally removes blocks with whitespace only
:heavy_check_mark:	:wrench:	no-defaults	This rule reports defaults being used on the relevant portion of @param or @default
		no-missing-syntax	This rule lets you report if certain always expected comment structures are missing.
:heavy_check_mark:	:wrench:	no-multi-asterisks	Prevents use of multiple asterisks at the beginning of lines
		no-restricted-syntax	Reports when certain comment structures are present
On in TS	:wrench:	no-types	Prohibits types on @param or @returns (redundant with TypeScript)
:heavy_check_mark: (off in TS and TS flavor)		no-undefined-types	Besides some expected built-in types, prohibits any types not specified as globals or within @typedef
	:wrench:	require-asterisk-prefix	Requires that each JSDoc line starts with an *
		require-description	Requires that all functions (and potentially other contexts) have a description.
	:wrench:	require-description-complete-sentence	Requires that block description, explicit @description, and @param/@returns tag descriptions are written in complete sentences
	:wrench:	require-example	Requires that all functions (and potentially other contexts) have examples.
		require-file-overview	By default, requires a single @file tag at the beginning of each linted file
	:wrench:	require-hyphen-before-param-description	Requires a hyphen before @param descriptions (and optionally before @property descriptions)
:heavy_check_mark:	:wrench:	require-jsdoc	Checks for presence of jsdoc comments, on functions and potentially other contexts (optionally limited to exports).
:heavy_check_mark:	:wrench:	require-param	Requires that all function parameters are documented with a @param tag.
:heavy_check_mark:		require-param-description	Requires that each @param tag has a description value.
:heavy_check_mark:		require-param-name	Requires that all @param tags have names.
:heavy_check_mark: (off in TS)		require-param-type	Requires that each @param tag has a type value (within curly brackets).
:heavy_check_mark:	:wrench:	require-property	Requires that all @typedef and @namespace tags have @property tags when their type is a plain object, Object, or PlainObject.
:heavy_check_mark:		require-property-description	Requires that each @property tag has a description value.
:heavy_check_mark:		require-property-name	Requires that all @property tags have names.
:heavy_check_mark: (off in TS)		require-property-type	Requires that each @property tag has a type value (within curly brackets).
:heavy_check_mark:		require-returns	Requires that return statements are documented.
:heavy_check_mark:		require-returns-check	Requires a return statement be present in a function body if a @returns tag is specified in the jsdoc comment block (and reports if multiple @returns tags are present).
:heavy_check_mark:		require-returns-description	Requires that the @returns tag has a description value (not including void/undefined type returns).
:heavy_check_mark: (off in TS)		require-returns-type	Requires that @returns tag has a type value (in curly brackets).
		require-template	Requires @template tags be present when type parameters are used.
		require-throws	Requires that throw statements are documented
:heavy_check_mark:		require-yields	Requires that yields are documented
:heavy_check_mark:		require-yields-check	Ensures that if a @yields is present that a yield (or yield with a value) is present in the function body (or that if a @next is present that there is a yield with a return value present)
		sort-tags	Sorts tags by a specified sequence according to tag name, optionally adding line breaks between tag groups
:heavy_check_mark:	:wrench:	tag-lines	Enforces lines (or no lines) between tags
	:wrench:	text-escaping	This rule can auto-escape certain characters that are input within block and tag descriptions
:heavy_check_mark:		valid-types	Requires all types/namepaths to be valid JSDoc, Closure compiler, or TypeScript types (configurable in settings)