NestJS

What is NestJS?

NestJS gives Node backends a clear, modular structure with dependency injection and well-considered conventions. Instead of reinventing every project, you arrange your code into modules, controllers and providers, which separates responsibilities cleanly. That structure pays off especially in testing, because dependencies are passed in as inputs and easily swapped out in a test. In larger codebases it keeps everything testable and helps new team members find their feet quickly.

import { Controller, Get, Param } from "@nestjs/common";
import { UsersService } from "./users.service";

@Controller("users")
export class UsersController {
  constructor(private readonly users: UsersService) {}

  @Get(":id")
  findOne(@Param("id") id: string) {
    return this.users.findById(id);
  }
}