Gain insights into building scalable backend applications with NestJS. Explore modules, REST API, TypeORM, JWT authentication, and automated testing to advance your backend development skills.

hello-world.tar.gz

nest-first-app

nest-starter

nest-starter-build

nest-starter-start-in-prod

nest-starter-start-module-controller-service

nest-starter-start-generate-resource

database-agnostic

nest-global-module

nest-scope

books-api

books-api-database

books-api-database-configuration

books-api-database-configuration-joi

books-api-database-configuration-default-env

books-api-database-configuration-dev-env

nest-react-hashing

books-api-test-auth-service

books-api-test-end-to-end

nest-react-spa

nest-react-bcrypt

In this course, you will cover NestJS, a framework used to build efficient and reliable server-side applications. Using this framework, developers can make highly scalable backend applications that can be consumed with any type of frontend. 

You will start the course by learning the foundational blocks of NestJS, such as understanding modules, services, and controllers. Next, you will learn how to build REST API, validation and error handling. You will also learn database integration using TypeORM, app configuration using environment variables, authentication, and authorization using JWT tokens. You will complete this course by learning automated testing and application logging.

After completing this course, you will be equipped with all the necessary skills to build scalable backend applications using NestJS, and that will also advance your career in backend development.

Building a Back-End Application with NestJS

Which component is responsible for handling incoming requests and returning responses in NestJS?

Which component is responsible for handling incoming requests and returning responses in NestJS?

To handle incoming requests and return responses

To define the application architecture and dependencies

What is the main purpose of a service in NestJS?

What is the main purpose of a service in NestJS?

```typescript
import { Module } from '@nestjs/common';
import { UsersController } from './users.controller';
import { UsersService } from './users.service';

@Module({
  controllers: [UsersController],
  providers: [UsersService],
})
export class UsersModule {}
```

```typescript
import { Module } from '@nestjs/common';
import { UsersController } from './users.controller';
import { UsersService } from './users.service';

@Module({
  controllers: UsersController,
  providers: UsersService,
})
export class UsersModule {}

```

```typescript
import { Module } from '@nestjs/common';
import { UsersController } from './users.controller';
import { UsersService } from './users.service';

@Module(() => ({
  controllers: [UsersController],
  providers: [UsersService],
}))
export function UsersModule() {}
```


```typescript
import { Module } from '@nestjs/common';
import { UsersController } from './users.controller';
import { UsersService } from './users.service';

@Module({
  routes: [UsersController],
  exports: [UsersService],
})
export class UsersModule {}
```

Which is the correct code to define a `UsersModule` in the NestJS application?

Which is the correct code to define a <code>UsersModule</code> in the NestJS application?

To indicate that a class should be treated as a provider

To indicate that a class should be treated as a controller

To specify that the class should be instantiated as a singleton within the module

To help with the management of dependencies within the NestJS framework

What is the `@Injectable` decorator in NestJS used for?

What is the <code>@Injectable</code> decorator in NestJS used for?

```typescript
import { Module } from '@nestjs/common';

@Module({})
export class Logger {}
```

```typescript
import { Controller } from '@nestjs/common';

@Controller()
export class Logger {}
```

```typescript
import { Injectable } from '@nestjs/common';

@Injectable()
export class Logger {}
```

```typescript
import { Provider } from '@nestjs/common';

@Provider()
export class Logger {}
```

Which code example correctly defines a provider in NestJS?

Which code example correctly defines a provider in NestJS?

Test your knowledge about NestJS building block.

Introduction

Getting Started

NestJS CLI

Building a REST API

Validation and Error Handling

Working with Databases

App Configuration

Authentication

Authorization

Testing

Logging

Wrapping Up

Build a Rest API for an Image-Sharing App With Node.js

Quiz on NestJS Building Blocks