HJHarsh Josolkarinharshjosolkar.hashnode.dev·May 31 · 6 min readBehind the Feed: How Social Media Apps Store Reels, Photos, and DraftsImagine you are midway through recording the perfect Reel. You have trimmed the clips, applied a vibrant color filter, and synced the cuts to a trending audio track. Suddenly, you get a phone call. Yo00
HJHarsh Josolkarinharshjosolkar.hashnode.dev·May 30 · 7 min readHow WhatsApp Works Without Internet: Offline Messaging and Sync ExplainedImagine you are boarding a flight. You switch your phone to airplane mode, open WhatsApp, and text your friend: "Just taking off, see you in a few hours!" Instantly, the message bubble appears on your00
HJHarsh Josolkarinharshjosolkar.hashnode.dev·May 23 · 8 min readExpo Router vs React Navigation - Which One Should You Use in 2026?As of 2026, the React Native ecosystem has reached a fascinating level of maturity. We now have Expo Router v55 pushing the boundaries of universal apps with advanced web and native features, while Re00
HJHarsh Josolkarinharshjosolkar.hashnode.dev·May 22 · 6 min readHow Instagram, WhatsApp, Uber & Netflix Would Be Built Today Using Expo RouterBuilding a mobile application for ten users is a matter of writing code. Building an app for ten million users is a matter of architecture. In the early days of React Native, routing and state managem00
HJHarsh Josolkarinharshjosolkar.hashnode.dev·May 10 · 5 min readTemplate Literals in JavaScriptIf you have been writing JavaScript for a while, or even if you are just diving into modern codebases, you know that working with strings is a fundamental part of development. From constructing API UR00
