Node.js

14.8    Documenting the Endpoints with OpenAPI

In addition to the implementation of interfaces, the documentation of these interfaces is another standard problem for which Nest offers an elegant solution. The @nestjs/swagger package provides everything you need to document your interfaces and generates graphical documentation from some additional annotations that you can consume via the Swagger UI or share with other developers. To do this, you must first install the necessary packages via the npm install @nestjs/swagger swagger-ui-express command. First, you need to integrate the Swagger module in your application via the main.ts file, as shown in Listing 14.24.

import { NestFactory } from '@nestjs/core';import { DocumentBuilder, SwaggerModule ...