Building a RESTful API with NestJS, TypeScript, and ExpressJS: A Comprehensive Guide

NestJs for beginners

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NestJS is a rapidly growing Node.js framework gaining popularity for its robust architecture, TypeScript support, and extensive features for building scalable and maintainable applications. In this article, I’ll walk you through building a RESTful API from scratch using these technologies.

Prerequisites

Before we dive into building our API, make sure you have the following prerequisites:

1. Node.js and npm (Node Package Manager): Ensure you have Node.js (v12 or higher) and npm (v6 or higher) installed on your machine.
2. Familiarity with RESTful API concepts.
3. IDE/Text Editor: Choose an IDE or text editor of your preference. Popular options include Visual Studio Code, WebStorm, and Atom.
4. TypeScript: Basic knowledge of TypeScript and you should have it installed globally. If not, you can install it with the following command.

npm install -g typescript

Setting Up the Project

Let’s start by creating a new NestJS project using the Nest CLI (Command Line Interface). Open your terminal and run the following commands: