openapi-jsdoc

Overview

openapi-jsdoc parses your OpenAPI (formerly known as Swagger) documentation from your JSDoc code comments.

Heavily inspired by swagger-jsdoc.

Supported versions

• OpenAPI 3.0

Getting started

To install run

$ npm install openapi-jsdoc

You need to define initial OpenAPI root object in definition property. For more detail see here.

openapi-jsdoc returns OpenAPI specification in json format.

const openapiJSDoc = require('openapi-jsdoc')
 
const api = openapiJSDoc({
  definition: {
    // info object, see https://swagger.io/specification/#infoObject
    info: {
      title: 'Example app', // required
      version: '1.0.0', // required
      description: 'A sample API for example app'
    }
  },
  // Paths to the API docs
  apis: ['./example/routes/*.js', './example/parameters.yaml']
})

Note that openapi-jsdoc uses node glob module in the background when taking your files. This means that you can use patterns such as *.js to select all javascript files or **/*.js to select all javascript files in sub-folders recursively.

How to document the API

The API can now be documented in JSDoc-style with swagger spec in YAML. Root property can be tags or components, everything else is considered to be API path names. See the example app in the example subdirectory to get sense of it.

  /**
   * @openapi
   * /login:
   *   post:
   *     operationId: login
   *     description: Login to the application
   *     tags: '/auth'
   *     requestBody:
   *       content:
   *         application/json:
   *           schema:
   *             type: object
   *             required:
   *               - name
   *               - password
   *             properties:
   *               name:
   *                 type: string
   *               password:
   *                 type: string
   *     responses:
   *       '200':
   *         description: Logged in user info
   *         content:
   *           application/json:
   *             schema:
   *               type: object
   *               $ref: '#/components/schemas/User'
   */
  app.post('/login', function (req, res) {
    res.json({ id: 1, name: req.body.name })
  })

To define a list of tags used by the specification:

  /**
   * @openapi
   * tags:
   *   - name: '/users'
   *     description: Users routes
   */

Components object holds various schemas and other reusable things for the specification:

/**
 * @openapi
 * components:
 *   schemas:
 *     UserExpanded:
 *       allOf:
 *         - $ref: '#/components/schemas/User'
 *         - type: object
 *           properties:
 *             address:
 *               type: string
 *     User:
 *       type: object
 *       properties:
 *         id:
 *           type: int
 *           format: uuid
 *         name:
 *           type: string
 *   parameters:
 *     - name: id
 *       in: path
 *       description: User ID
 *       required: true
 */

Example app

There is an example app in the example subdirectory. To use it you can use the following commands:

$ git clone https://github.com/dotaxe/openapi-jsdoc.git
$ cd openapi-jsdoc
$ npm install
$ npm start

The OpenAPI specification will be served at http://localhost:3000/api-docs.json