Nest JS
Table of Contents
NestJS
A progressive Node.js framework for building efficient, reliable and scalable server-side applications.
I have been developing projects using JS, Typescript actually. I started with React and then NextJS. Now I am interested in Backend.
Description:
Nest is a framework for building efficient, scalable Node.js server-side applications. It uses modern JavaScript, is built with
- TypeScript (preserves compatibility with pure JavaScript) and
- combines elements of OOP (Object Oriented Programming),
- FP (Functional Programming), and
- FRP (Functional Reactive Programming).
Under the hood, Nest makes use of Express, but also provides compatibility with a wide range of other libraries, like Fastify, allowing for easy use of the myriad of third-party plugins which are available.
Nest aims to provide an application architecture out of the box which allows for effortless creation of
- highly testable,
- scalable, and
- loosely coupled and
- easily maintainable applications.
The architecture is heavily inspired by Angular.
The docs
Getting started:
Installation:
$ npm i -g @nestjs/cli
$ nest new project-name
It will ask to select the package manager to use.
✔ Installation in progress... ☕
🚀 Successfully created project hello-world
👉 Get started with the following commands:
$ cd hello-world
$ yarn run start
Thanks for installing Nest 🙏
Please consider donating to our open collective
to help us maintain this package.
🍷 Donate: https://opencollective.com/nest
For offline:
$ yarn --offline run start
Compile and run the project
# development
$ yarn run start
# watch mode
$ yarn run start:dev
# production mode
$ yarn run start:prod
Run tests
# unit tests
$ yarn run test
# e2e tests
$ yarn run test:e2e
# test coverage
$ yarn run test:cov
Open your browser and navigate to http://localhost:3000/.
This should show “Hello World!” in frontend.
"dependencies": {
"@nestjs/common": "^10.0.0",
"@nestjs/core": "^10.0.0",
"@nestjs/platform-express": "^10.0.0",
"reflect-metadata": "^0.2.0",
"rxjs": "^7.8.1"
}
"devDependencies": {
"@nestjs/cli": "^10.0.0",
"@nestjs/schematics": "^10.0.0",
"@nestjs/testing": "^10.0.0",
"@types/express": "^5.0.0",
"@types/jest": "^29.5.2",
"@types/node": "^20.3.1",
"@types/supertest": "^6.0.0",
"@typescript-eslint/eslint-plugin": "^8.0.0",
"@typescript-eslint/parser": "^8.0.0",
"eslint": "^8.0.0",
"eslint-config-prettier": "^9.0.0",
"eslint-plugin-prettier": "^5.0.0",
"jest": "^29.5.0",
"prettier": "^3.0.0",
"source-map-support": "^0.5.21",
"supertest": "^7.0.0",
"ts-jest": "^29.1.0",
"ts-loader": "^9.4.3",
"ts-node": "^10.9.1",
"tsconfig-paths": "^4.2.0",
"typescript": "^5.1.3"
}
The basic boilerplate has:
- Typesript
- Jest for Testing
So, the meat of the project!
main –> module(App module) –> controller(AppController), provider(AppService)
controller: routes
provider: functions in routes
