swagger-jsdoc

What is swagger-jsdoc?

swagger-jsdoc is a Node.js library that allows you to integrate Swagger/OpenAPI documentation into your Express.js or other Node.js applications. It generates the Swagger specification based on JSDoc comments in your code, making it easier to maintain and update API documentation.

What are swagger-jsdoc's main functionalities?

Generate Swagger Documentation

This feature allows you to generate Swagger documentation from JSDoc comments in your code. The `options` object specifies the OpenAPI version, API info, and the files containing the JSDoc comments.

const swaggerJsdoc = require('swagger-jsdoc');
const options = {
  definition: {
    openapi: '3.0.0',
    info: {
      title: 'Express API with Swagger',
      version: '1.0.0',
    },
  },
  apis: ['./routes/*.js'], // files containing annotations as above
};
const swaggerSpec = swaggerJsdoc(options);

Integrate with Express

This feature demonstrates how to integrate Swagger UI with an Express application. The Swagger documentation is served at the `/api-docs` endpoint.

const express = require('express');
const swaggerUi = require('swagger-ui-express');
const swaggerJsdoc = require('swagger-jsdoc');

const app = express();
const options = {
  definition: {
    openapi: '3.0.0',
    info: {
      title: 'Express API with Swagger',
      version: '1.0.0',
    },
  },
  apis: ['./routes/*.js'],
};
const swaggerSpec = swaggerJsdoc(options);

app.use('/api-docs', swaggerUi.serve, swaggerUi.setup(swaggerSpec));

app.listen(3000, () => {
  console.log('Server is running on port 3000');
});

JSDoc Annotations

This feature shows how to use JSDoc annotations to document an API endpoint. The annotations provide metadata about the endpoint, such as the HTTP method, summary, and response schema.

/**
 * @swagger
 * /users:
 *   get:
 *     summary: Retrieve a list of users
 *     responses:
 *       200:
 *         description: A list of users
 *         content:
 *           application/json:
 *             schema:
 *               type: array
 *               items:
 *                 type: object
 *                 properties:
 *                   id:
 *                     type: integer
 *                   name:
 *                     type: string
 */
app.get('/users', (req, res) => {
  res.json([{ id: 1, name: 'John Doe' }]);
});

Other packages similar to swagger-jsdoc

swagger-ui-express

swagger-ui-express is a middleware for Express.js that serves auto-generated Swagger UI. It is often used in conjunction with swagger-jsdoc to serve the generated Swagger documentation. While swagger-jsdoc focuses on generating the Swagger specification, swagger-ui-express focuses on serving it in a user-friendly interface.

openapi-generator

openapi-generator is a tool that can generate client libraries, server stubs, API documentation, and configuration from an OpenAPI Specification. Unlike swagger-jsdoc, which generates the OpenAPI spec from JSDoc comments, openapi-generator takes an existing OpenAPI spec and generates code and documentation from it.

redoc

redoc is a tool for generating API documentation from OpenAPI specifications. It provides a customizable and responsive HTML documentation. Unlike swagger-jsdoc, which generates the OpenAPI spec, redoc focuses on rendering the documentation from an existing spec.

README

swagger-jsdoc

Document your code and keep a live and reusable OpenAPI (Swagger) specification. This specification can be the core of your API-driven project: generate documentation, servers, clients, tests and much more based on the rich OpenAPI ecosystem of tools.

Goals

swagger-jsdoc enables you to integrate Swagger using JSDoc comments in your code. Just add @swagger on top of your DocBlock and declare the meaning of your code in yaml complying to the OpenAPI specification.

swagger-jsdoc will parse your documentation from your actual living code and output an OpenAPI specification to integrate any server and client technology as long as both sides comply with the specification.

Thus, the swagger-jsdoc project assumes that you want document your existing working code in a way to "give life" to it, generating a specification which can then be fed into other Swagger tools, and not the vice-versa.

If you prefer to write the OpenAPI specification first and separately, you might check other projects facilitating this, such as

• swagger-editor
• swagger-node

Supported versions

• OpenAPI 3.x
• Swagger 2.0

You can find the corresponding documentation in the official repository of the specification.

Install

$ npm install swagger-jsdoc --save

Or using yarn

$ yarn add swagger-jsdoc

Quick Start

Get started by documenting your code.

Note that swagger-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.

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/Surnet/swagger-jsdoc.git
$ cd swagger-jsdoc
$ npm install
$ npm start

The swagger spec will be served at http://localhost:3000/api-docs.json

CLI

You can also use the tool via command line interface.

Contributing

• Fork this project and clone locally
• Branch for each separate feature
• Write detailed commit messages, comment unclear code blocks and update unit tests
• Push to your own repository and create a new PR to merge back into this repository