Async Service Example - Nestjs Typing CST Test

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Async Service Example — Nestjs Code

Shows a service returning data asynchronously using Promises.

import { Injectable, Controller, Get, Module } from '@nestjs/common';
import { NestFactory } from '@nestjs/core';

@Injectable()
class AsyncService {
	async fetchData() { return new Promise(resolve => setTimeout(() => resolve('Async Data'), 500)); }
}

@Controller()
class AppController {
	constructor(private readonly service: AsyncService) {}
	@Get('data') async getData() { return { data: await this.service.fetchData() }; }
}

@Module({ controllers: [AppController], providers: [AsyncService] })
class AppModule {}

async function bootstrap() {
	const app = await NestFactory.create(AppModule);
	await app.listen(3000);
}
bootstrap();

Nestjs Language Guide

NestJS is a progressive Node.js framework for building efficient, scalable, and maintainable server-side applications using TypeScript and modern JavaScript.

Primary Use Cases

▸Building RESTful APIs and GraphQL services
▸Creating microservices with built-in support
▸Developing server-side applications with TypeScript
▸Implementing real-time WebSocket applications
▸Building enterprise-grade backend systems

Notable Features

▸TypeScript-first design
▸Modular architecture
▸Dependency Injection container
▸Support for REST, GraphQL, WebSockets, and microservices
▸Built-in testing and CLI tools

Origin & Creator

NestJS was created by Kamil Myśliwiec in 2017 to provide a structured framework for building maintainable Node.js server-side applications with TypeScript.

Industrial Note

NestJS is popular in enterprise backend ecosystems and microservice architectures, providing scalable, modular, and maintainable server-side solutions.

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Async Service Example — Nestjs Code

Shows a service returning data asynchronously using Promises.

import { Injectable, Controller, Get, Module } from '@nestjs/common'; import { NestFactory } from '@nestjs/core'; @Injectable() class AsyncService { async fetchData() { return new Promise(resolve => setTimeout(() => resolve('Async Data'), 500)); } } @Controller() class AppController { constructor(private readonly service: AsyncService) {} @Get('data') async getData() { return { data: await this.service.fetchData() }; } } @Module({ controllers: [AppController], providers: [AsyncService] }) class AppModule {} async function bootstrap() { const app = await NestFactory.create(AppModule); await app.listen(3000); } bootstrap();

Nestjs Language Guide

NestJS is a progressive Node.js framework for building efficient, scalable, and maintainable server-side applications using TypeScript and modern JavaScript.

Primary Use Cases

▸Building RESTful APIs and GraphQL services
▸Creating microservices with built-in support
▸Developing server-side applications with TypeScript
▸Implementing real-time WebSocket applications
▸Building enterprise-grade backend systems

Notable Features

▸TypeScript-first design
▸Modular architecture
▸Dependency Injection container
▸Support for REST, GraphQL, WebSockets, and microservices
▸Built-in testing and CLI tools

Origin & Creator

NestJS was created by Kamil Myśliwiec in 2017 to provide a structured framework for building maintainable Node.js server-side applications with TypeScript.

Industrial Note

NestJS is popular in enterprise backend ecosystems and microservice architectures, providing scalable, modular, and maintainable server-side solutions.