Govinda Padit 1. Breakdown: req.params Kya Hai? 2. Ye Kaam Kaise Karta Hai? (Step-by-Step) Step 1: Route Define Karein (Backend – server.js) Yahan aap ek placeholder banate hain :id naam ka. JavaScript Step 2: URL Hit Karein (Frontend/Browser) Agar user browser mein type karta hai: localhost:5000/product/99 3. req.params vs req.body (Fark Samjhein) Industry mein log aksar inmein … Read more
Ecommerce website banate waqt inhe samajhna bohot zaroori hai taaki aap frontend par sahi message dikha sakein. 1. 200 OK (Success) ✅ Ye sabse achha signal hai. Iska matlab hai ki sab kuch sahi gaya. 2. 400 Bad Request (Client Error) ❌ Ye error tab aata hai jab frontend ne galat data bheja ho jo … Read more
1. Breakdown: const { userId, productId } = req.body 2. Bina Destructuring ke ye kaisa dikhta? Agar aap destructuring use nahi karte, toh aapko har baar req.body likhna padta, jo ki kaafi boring aur lamba code ho jata: JavaScript Destructuring ke baad (Clean Code): JavaScript 3. Ecommerce Use Case (Example) Maan lijiye aapka “Add to … Read more
1. Model ka naam Capital (Cart) kyun? Jab aap mongoose.model(‘Cart’, cartSchema) likhte hain, toh ye ek Constructor Function ya Class ki tarah kaam karta hai. 2. Schema ka naam Capital (CartSchema) kyun? Schema ek blueprint (naksha) hota hai. Ise capital likhne ka matlab hai ki ye ek “Constant” ya “Definition” hai jo badlegi nahi. 3. … Read more
Jab aap ek Ecommerce website banate hain, toh aapko “Products”, “Orders”, aur “Users” ke beech connection banana padta hai. Mongoose mein ye kaam mongoose.Schema.Types.ObjectId aur ref ke zariye hota hai. Chaliye is code snippet ko step-by-step todte hain: JavaScript 1. type: mongoose.Schema.Types.ObjectId MongoDB har document ko ek unique pehchan deta hai jise hum _id kehte … Read more
React mein Single Page Applications (SPA) banate waqt, humein aksar aise pages ki zaroorat padti hai jo Dynamic hon. Jaise ki ek Ecommerce site par hazaron products ke liye sirf ek “Product Detail” page. Yahi kaam aasaan banata hai useParams hook. 1. useParams Kya Hai? useParams React Router library ki ek inbuilt Hook hai. Iska … Read more