Global modules in NestJS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to make the module global using the decorator.

NestJS

import { Module, [1] } from '@nestjs/common';

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

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

AGlobal

BInjectable

CController

DService

Attempts:

3 left

💡 Hint

Common Mistakes

Using @Injectable instead of @Global

Forgetting to add the decorator

Confusing @Controller with @Global

The @Global() decorator marks a module as global, so it doesn't need to be imported everywhere.

2fill in blank

medium

Complete the code to export the service from the global module.

NestJS

import { Module, Global } from '@nestjs/common';
import { MyService } from './my.service';

@Global()
@Module({
  providers: [MyService],
  [1]: [MyService],
})
export class MyGlobalModule {}

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Acomponents

Bimports

Ccontrollers

Dexports

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'imports' instead of 'exports'

Leaving out the exports array

Adding the service to controllers

The exports array makes the service available throughout the application since the module is global.

3fill in blank

hard

Fix the error in the code to properly use the global module.

NestJS

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

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

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

AConfigController

BConfigModule

CConfigService

DConfigProvider

Attempts:

3 left

💡 Hint

Common Mistakes

Exporting the module class instead of the provider

Using a controller name in exports

Leaving exports empty

The exports array must list the provider to share it. Here, ConfigService is the provider to export.

4fill in blank

hard

Fill both blanks to create a global module that exports a service and imports another module.

NestJS

import { Module, [1] } from '@nestjs/common';
import { SharedModule } from './shared.module';
import { LoggerService } from './logger.service';

@[1]()
@Module({
  imports: [[2]],
  providers: [LoggerService],
  exports: [LoggerService],
})
export class LoggerModule {}

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

AGlobal

BInjectable

CSharedModule

DLoggerService

Attempts:

3 left

💡 Hint

Common Mistakes

Using @Injectable instead of @Global

Importing the service instead of the module

Forgetting to export the service

The @Global() decorator marks the module global, and SharedModule is imported to use its exports.

5fill in blank

hard

Fill all three blanks to define a global module that imports another module, provides a service, and exports it.

NestJS

import { Module, [1] } from '@nestjs/common';
import { DatabaseModule } from './database.module';
import { AuthService } from './auth.service';

@[1]()
@Module({
  imports: [[2]],
  providers: [[3]],
  exports: [[3]],
})
export class AuthModule {}

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

AGlobal

BDatabaseModule

CAuthService

DConfigModule

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up service and module names

Not exporting the provided service

Using wrong decorator names

The @Global() decorator makes the module global, DatabaseModule is imported, and AuthService is provided and exported.