NestJS Swagger Error: "Cannot find module '@nestjs/swagger'"

[Mercure28]

Why do I get "Cannot find module '@nestjs/swagger'" in NestJS?

[TatyOko28]

This happens when Swagger is not installed.

Solution: Install Swagger module

npm install @nestjs/swagger swagger-ui-express

Then, set up Swagger in main.ts:

import { SwaggerModule, DocumentBuilder } from "@nestjs/swagger";

const config = new DocumentBuilder()
    .setTitle("API Docs")
    .setDescription("My API description")
    .setVersion("1.0")
    .build();

const document = SwaggerModule.createDocument(app, config);
SwaggerModule.setup("api", app, document);