Module re-exporting in NestJS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to export the imported module in NestJS.

NestJS

import { Module } from '@nestjs/common';
import { UsersModule } from './users.module';

@Module({
  imports: [UsersModule],
  exports: [[1]],
})
export class SharedModule {}

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

AUsersModule

BSharedModule

CAppModule

DCommonModule

Attempts:

3 left

💡 Hint

Common Mistakes

Exporting the current module instead of the imported one.

Forgetting to export the module after importing.

You export UsersModule so other modules importing SharedModule can use it.

2fill in blank

medium

Complete the code to re-export multiple modules in NestJS.

NestJS

import { Module } from '@nestjs/common';
import { UsersModule } from './users.module';
import { AuthModule } from './auth.module';

@Module({
  imports: [UsersModule, AuthModule],
  exports: [1],
})
export class SharedModule {}

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

AUsersModule

B[UsersModule, AuthModule]

CAuthModule

D[]

Attempts:

3 left

💡 Hint

Common Mistakes

Exporting only one module when multiple are imported.

Not using an array for multiple exports.

To re-export multiple modules, list them inside an array in the exports property.

3fill in blank

hard

Fix the error in the code to properly re-export the imported module.

NestJS

import { Module } from '@nestjs/common';
import { ProductsModule } from './products.module';

@Module({
  imports: [ProductsModule],
  exports: [1],
})
export class InventoryModule {}

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

AProductsModule

BInventoryModule

C[]

D[ProductsModule]

Attempts:

3 left

💡 Hint

Common Mistakes

Using a single module without array brackets in exports.

Confusing imports and exports syntax.

The exports property expects an array, so wrap ProductsModule in square brackets.

4fill in blank

hard

Fill both blanks to create a module that imports and re-exports two modules.

NestJS

import { Module } from '@nestjs/common';
import { OrdersModule } from './orders.module';
import { PaymentsModule } from './payments.module';

@Module({
  imports: [[1], [2]],
  exports: [OrdersModule, PaymentsModule],
})
export class TransactionsModule {}

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

AOrdersModule

BPaymentsModule

CUsersModule

DAuthModule

Attempts:

3 left

💡 Hint

Common Mistakes

Importing modules not listed in exports.

Swapping module names.

You import both OrdersModule and PaymentsModule so you can re-export them.

5fill in blank

hard

Fill all three blanks to create a module that imports, re-exports, and uses a service from another module.

NestJS

import { Module } from '@nestjs/common';
import { NotificationsModule } from './notifications.module';
import { EmailService } from './email.service';

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

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

ANotificationsModule

CEmailService

DAuthService

Attempts:

3 left

💡 Hint

Common Mistakes

Putting services in imports or exports instead of providers.

Not re-exporting the imported module.

You import and export NotificationsModule to re-export it, and provide EmailService for use inside this module.