Welcome to Day 1 of our NestJS learning path! Today, you'll learn the core concepts behind NestJS and build a simple REST API. We'll cover the basics of modules, controllers, providers, and dependency injection—all essential building blocks of a NestJS application.
What is NestJS and Why Use It?
NestJS is a progressive Node.js framework for building efficient, scalable, and maintainable server-side applications. It is built with and fully supports TypeScript, while also enabling developers to leverage the best of JavaScript. Key reasons to use NestJS include:
- Modular Architecture: Organize your code into modules for better scalability and maintainability.
- Dependency Injection (DI): Simplify code management by injecting required services or providers.
- Built-in Support for REST APIs: Quickly create RESTful endpoints with decorators and a clean syntax.
- Extensible and Versatile: Easily integrate with other libraries and frameworks, including support for microservices.
Key Topics for Day 1
- NestJS Overview: Understand the philosophy and benefits of using NestJS.
- Modules, Controllers, and Providers: Learn how these building blocks work together.
- Dependency Injection (DI): See how NestJS manages dependencies to keep your code modular and testable.
- Creating a Basic REST API: Get hands-on experience setting up a NestJS project with a simple controller, service, and module.
Hands-On: Building a Simple REST API
In this exercise, you will create a basic NestJS project and build a simple REST API endpoint.
Steps to Create Your NestJS Project
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Install the NestJS CLI (if not already installed):
npm install -g @nestjs/cli