AJAshish Jhainaashishjha.hashnode.dev·Jun 1 · 7 min readHow WhatsApp Works Without Internet: Offline Messaging and Sync ExplainedImagine this. You're traveling on a flight and switch your phone to airplane mode. A friend sends you a message, and you quickly reply. Surprisingly, your message immediately appears in the chat as if00
AJAshish Jhainaashishjha.hashnode.dev·May 29 · 6 min readExpo Router vs React Navigation - Which Should You Use in 2026?If you've been learning React Native recently, you've probably heard two names again and again: React Navigation and Expo Router. For years, React Navigation has been the standard solution for handlin00
AJAshish Jhainaashishjha.hashnode.dev·May 28 · 7 min readHow Instagram, WhatsApp, Uber & Netflix Would Be Built Today Using Expo RouterMost beginners build mobile apps using simple folders and random files.That works for small projects. But when apps become large, everything becomes difficult to manage. Apps like Instagram, WhatsApp,00
AJAshish Jhainaashishjha.hashnode.dev·May 7 · 5 min readUnderstanding Variables and Data Types in JavaScriptImagine you want to store: your name your age whether you are a student inside a JavaScript program. How does JavaScript remember these values? Using variables. Variables are one of the most fund00
AJAshish Jhainaashishjha.hashnode.dev·May 6 · 5 min readHow Node.js Handles Multiple Requests with a Single ThreadOne of the most confusing things beginners hear is: “Node.js is single-threaded.” And then immediately after: “Node.js can handle thousands of requests.” At first, these two statements feel imposs00
