Shared modules in NestJS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import a shared module in a NestJS module.

NestJS

import { Module } from '@nestjs/common';
import { SharedModule } from './shared/shared.module';

@Module({
  imports: [[1]],
})
export class AppModule {}

Drag options to blanks, or click blank then click option'

ACoreModule

BSharedModule

CCommonModule

DAppModule

Attempts:

3 left

💡 Hint

Common Mistakes

Importing the wrong module name.

Forgetting to add the module to the imports array.

You import the shared module by adding SharedModule to the imports array.

2fill in blank

medium

Complete the code to export a service from a shared module.

NestJS

import { Module } from '@nestjs/common';
import { LoggerService } from './logger.service';

@Module({
  providers: [LoggerService],
  exports: [[1]],
})
export class SharedModule {}

Drag options to blanks, or click blank then click option'

ALoggerService

BDatabaseService

CAppService

DAuthService

Attempts:

3 left

💡 Hint

Common Mistakes

Exporting a service not provided in the module.

Forgetting to export the service.

To share a service, you export it from the shared module by adding it to the exports array.

3fill in blank

hard

Fix the error in the shared module to properly export the service.

NestJS

import { Module } from '@nestjs/common';
import { ConfigService } from './config.service';

@Module({
  providers: [ConfigService],
  exports: [[1]],
})
export class SharedModule {}

Drag options to blanks, or click blank then click option'

AConfig

BConfigModule

CSharedModule

DConfigService

Attempts:

3 left

💡 Hint

Common Mistakes

Exporting the module instead of the service.

Using incorrect names in the exports array.

The service to export must be the provider itself, here ConfigService.

4fill in blank

hard

Fill both blanks to create a shared module that provides and exports a service.

NestJS

import { Module } from '@nestjs/common';
import { [1] } from './cache.service';

@Module({
  providers: [[2]],
  exports: [[2]],
})
export class CacheModule {}

Drag options to blanks, or click blank then click option'

ACacheService

BCacheModule

CCacheController

DCacheProvider

Attempts:

3 left

💡 Hint

Common Mistakes

Using module or controller names instead of service names.

Not exporting the service after providing it.

You import, provide, and export the CacheService to share it.

5fill in blank

hard

Fill the blank to import a shared module so its exported service can be used in this module.

NestJS

import { Module } from '@nestjs/common';
import { [1] } from './shared/shared.module';

@Module({
  imports: [[1]],
})
export class AppModule {}

Drag options to blanks, or click blank then click option'

ASharedModule

BLoggerService

CAppService

DCoreModule

Attempts:

3 left

💡 Hint

Common Mistakes

Importing the wrong module.

Listing the service in providers (unnecessary).

Directly importing the service class.

By importing the SharedModule, its exported LoggerService becomes available for injection in controllers and providers of this module.