@nestjs/config

Environment Variables Loading

This feature allows the application to load configuration variables from environment variables. The `forRoot` method can be used to customize the behavior, such as specifying a custom env file path.

import { ConfigModule } from '@nestjs/config';

@Module({
  imports: [ConfigModule.forRoot()],
})
export class AppModule {}

Custom Configuration Files

This feature enables the application to load configuration settings from custom files. Developers can define a configuration file that exports a configuration object and load it using the `load` option.

import { ConfigModule } from '@nestjs/config';
import configuration from './config/configuration';

@Module({
  imports: [
    ConfigModule.forRoot({
      load: [configuration],
    }),
  ],
})
export class AppModule {}

Typed Configuration

This feature allows accessing configuration variables with type safety. The `ConfigService`'s `get` method can be used to retrieve configuration variables, optionally specifying the expected type.

import { ConfigService } from '@nestjs/config';

@Injectable()
class SomeService {
  constructor(private configService: ConfigService) {}

  someMethod() {
    const dbUser = this.configService.get<string>('DATABASE_USER');
  }
}