NestJS Controller and Swagger Guide
Introduction NestJS is a progressive Node.js framework built with TypeScript, facilitating the development of efficient and scalable server-side applications. By default, NestJS uses Express as its core HTTP processing library. Key advantages include a tight modular architecture inspired by Angular and strong TypeScript support to reduce code errors. Controllers serve as the layer for processing incoming requests and returning responses to the client side. Their primary responsibility is to receive HTTP requests, route data to business logic services, and coordinate the returned result in the correct format. Swagger is a powerful suite of tools used for designing, building, and documenting RESTful APIs developed based on the OpenAPI data format specification. In NestJS, it helps automatically generate an intuitive UI interface for testing endpoints, enabling developers and stakeholders to understand the API structure without directly reading the source code. Detail After creating the N...