Express.js made backend development in JavaScript ridiculously simple. Before Express, building APIs in Node felt like assembling IKEA furniture without the manual 😅. 🧠 The JavaScript Revolution There was a time when JavaScript lived only inside browsers. Frontend? JavaScript. Backend? Mostly PHP, Java, Python, Ruby, or .NET. Then came Node.js in 2009 and everything changed. Suddenly, developers could write JavaScript on both: 🖥️ Client side (browser) 🌐 Server side (backend) Yes, this was a massive shift. Teams no longer needed separate frontend and backend language expertise. One language could handle: UI rendering API development Real-time chat apps Streaming File handling Even CLI tools And this is where Express.js entered like a Bollywood hero in slow motion 🎬. ⚡ Introducing Express Express.js is a lightweight web framework built on top of Node.js. Think of Node.js as the raw engine of a car 🚗.…