The Smart API Client ⚡️

Tired of slow API calls and redundant requests? Here's your secret weapon — a caching, timeout-protected fetch function that cuts response times by 80%.

this line of code gonna fetches data once, catches it, times out slow calls, and makes your app feel lightning fast⚡️.

const cache = new Map();

async function smartFetch(url, timeout = 10000) {
    if (cache.has(url)) return cache.get(url);
    
    const controller = new AbortController();
    const timer = setTimeout(() => controller.abort(), timeout);
    
    try {
        const res = await fetch(url, { signal: controller.signal });
        const data = await res.json();
        cache.set(url, data);
        return data;
    } finally {
        clearTimeout(timer);
    }
}

🚀 NestJS vs Express: The Real Difference

Express (Flexibility):

//app.js
const express = require('express');
const app = express();

app.get('/users', (req, res) => {
    // Some logics here
    res.json({ users: [] });
});

NestJS (Architecture):

// user.controller.ts - Built-in structure
import { Controller, Get, UseGuards } from '@nestjs/common';
import { AuthGuard } from './auth.guard';

@Controller('users')
@UseGuards(AuthGuard) // Built-in decorators
export class UsersController {
    @Get()
    getUsers() {
        return { users: [] };
    }
}

🔑 The Key Difference:

Express = You build the house (total freedom) 🏗

NestJS = You get a blueprint + tools (opinionated structure) 📐

🎯 Perfect for:

Express → Quick prototypes, small teams, full control

NestJS → Enterprise apps, large teams, TypeScript lovers

#NestJS #Express #NodeJS

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