Integration with Frameworks
- @nestjs/swagger:
@nestjs/swaggeris specifically designed for NestJS, leveraging its modular architecture and decorators to generate OpenAPI documentation automatically. - openapi-typescript:
openapi-typescriptis a standalone tool that generates TypeScript types from OpenAPI specifications, independent of any framework. - swagger-ui-express:
swagger-ui-expressis a middleware for Express that serves the Swagger UI, making it easy to integrate into any Express application. - swagger-jsdoc:
swagger-jsdocis also framework-agnostic, allowing you to document APIs using JSDoc comments regardless of the framework you use. - express-openapi-validator:
express-openapi-validatoris framework-agnostic but works seamlessly with Express.js applications, providing middleware for validation. - hapi-swagger:
hapi-swaggeris tailored for the Hapi framework, integrating smoothly to document routes and handlers.
Documentation Generation
- @nestjs/swagger:
@nestjs/swaggerautomatically generates OpenAPI documentation based on NestJS decorators like@ApiTags,@ApiOperation, etc. - openapi-typescript:
openapi-typescriptdoes not generate documentation but creates TypeScript types from an OpenAPI specification, enhancing type safety. - swagger-ui-express:
swagger-ui-expressdoes not generate documentation but serves the Swagger UI, which displays the documentation provided by the OpenAPI specification. - swagger-jsdoc:
swagger-jsdocgenerates a Swagger (OpenAPI) specification file from JSDoc comments in your code, which can then be used for documentation. - express-openapi-validator:
express-openapi-validatordoes not generate documentation but enforces validation based on an existing OpenAPI specification. - hapi-swagger:
hapi-swaggergenerates Swagger documentation automatically from Hapi route configurations and handlers.
Validation
- @nestjs/swagger:
@nestjs/swaggerdoes not perform validation but can be integrated with validation libraries like class-validator to validate request data based on the generated OpenAPI schema. - openapi-typescript:
openapi-typescriptdoes not perform validation; it focuses on generating TypeScript types from an OpenAPI specification. - swagger-ui-express:
swagger-ui-expressdoes not perform validation; it serves the Swagger UI for visualizing the API documentation. - swagger-jsdoc:
swagger-jsdocdoes not provide validation; it is used for generating OpenAPI specifications from JSDoc comments. - express-openapi-validator:
express-openapi-validatorprovides robust validation of requests and responses against an OpenAPI 3.x specification, ensuring compliance with the defined API contract. - hapi-swagger:
hapi-swaggerdoes not perform validation but can be integrated with Hapi's validation mechanisms to validate request data.
TypeScript Support
- @nestjs/swagger:
@nestjs/swaggerhas excellent TypeScript support, leveraging decorators and generics to provide type safety. - openapi-typescript:
openapi-typescriptis focused on TypeScript, generating types from OpenAPI specifications, making it ideal for TypeScript projects. - swagger-ui-express:
swagger-ui-expressis written in TypeScript and provides type definitions for integrating Swagger UI into Express applications. - swagger-jsdoc:
swagger-jsdocsupports TypeScript by allowing JSDoc comments in TypeScript files, but it does not provide type definitions for the generated spec. - express-openapi-validator:
express-openapi-validatoris written in TypeScript and provides type definitions, but it requires an existing OpenAPI spec for validation. - hapi-swagger:
hapi-swaggerprovides TypeScript definitions, but its integration with Hapi routes may require additional type annotations.
Ease of Use: Code Examples
- @nestjs/swagger:
NestJS Swagger Example
import { Controller, Get } from '@nestjs/common'; import { ApiTags, ApiOperation } from '@nestjs/swagger'; @ApiTags('cats') @Controller('cats') export class CatsController { @Get() @ApiOperation({ summary: 'Get all cats' }) findAll() { return []; } } - openapi-typescript:
OpenAPI TypeScript Example
npx openapi-typescript ./api-spec.json -o ./api-types.d.ts - swagger-ui-express:
Swagger UI Express Example
const swaggerUi = require('swagger-ui-express'); const swaggerDocument = require('./swagger.json'); app.use('/api-docs', swaggerUi.serve, swaggerUi.setup(swaggerDocument)); - swagger-jsdoc:
Swagger JSDoc Example
const swaggerJsDoc = require('swagger-jsdoc'); const swaggerUi = require('swagger-ui-express'); const swaggerOptions = { definition: { openapi: '3.0.0', info: { title: 'API', version: '1.0.0', }, }, apis: ['./routes/*.js'], }; const specs = swaggerJsDoc(swaggerOptions); app.use('/api-docs', swaggerUi.serve, swaggerUi.setup(specs)); - express-openapi-validator:
Express OpenAPI Validator Example
const express = require('express'); const { OpenApiValidator } = require('express-openapi-validator'); const app = express(); app.use(express.json()); // Load OpenAPI spec const apiSpec = require('./api-spec.json'); // Validate requests/responses app.use(OpenApiValidator.middleware(apiSpec)); app.get('/pets', (req, res) => { res.json([{ id: 1, name: 'Fluffy' }]); }); app.listen(3000, () => { console.log('Server running on http://localhost:3000'); }); - hapi-swagger:
Hapi Swagger Example
const Hapi = require('@hapi/hapi'); const HapiSwagger = require('hapi-swagger'); const { register } = require('@hapi/inert'); const { register: registerVision } = require('@hapi/vision'); const init = async () => { const server = Hapi.server({ port: 3000 }); await server.register([register, registerVision, HapiSwagger]); server.route({ method: 'GET', path: '/pets', handler: () => [{ id: 1, name: 'Fluffy' }], options: { description: 'Get all pets', tags: ['api'], }, }); await server.start(); console.log('Server running on %s', server.info.uri); }; init();
