@learnerexpress

How Instagram Stores Reels, Photos, and Drafts Behind the Scenes 📸🎥

May 31 · 8 min read · Imagine karo: Tum Instagram par ek Reel record karte ho. Filters add karte ho Music select karte ho Caption likhte ho Lekin achanak internet chala jata hai ya tum post karne ka plan cancel kar de

How React Virtual DOM Works Under the Hood

May 31 · 8 min read · Agar aap React seekh rahe ho, toh ek term aapne bahut baar suni hogi: "React is fast because of the Virtual DOM." Lekin actual question ye hai: 👉 Virtual DOM hota kya hai? 👉 React isko use kaise kar

How WhatsApp Works Without Internet: Offline Messaging and Sync Explained 📱

May 31 · 7 min read · \Imagine karo ki tum airplane mode ON karke WhatsApp par kisi friend ko message bhejte ho: "Bhai, kal milte hain 5 baje." Message chat screen me instantly dikh jata hai. Lekin internet toh hai hi nahi

React Native Routing : React Navigation vs Expo Router

May 23 · 7 min read · Mobile app development mein ek cheez har app ka backbone hoti hai: Navigation. User ek screen se doosri screen tak kaise move karega?Back button kaise behave karega?Auth ke baad app ka flow kaise ch

React Native App Architecture at Scale

May 23 · 9 min read · Mobile app banana easy hai.Lekin large-scale production app maintain karna actually difficult part hota hai. Jab app chhota hota hai tab simple folder structures kaam karte hain: /components /screens