🤔 Node.js Sikhna Kya Hai?
Node.js ek JavaScript runtime hai — yaani aap JS ko browser ke baahar (server pe) chala sakte ho. 2009 mein Ryan Dahl ne banaya, aaj Netflix, LinkedIn, Uber, PayPal ka backend Node.js pe chalta hai. India mein bhi Razorpay, Swiggy, Paytm, Zomato Node.js heavily use karte hain.
Node.js ka biggest selling point hai 'JavaScript everywhere'. Frontend (React/Vue) bhi JS, backend bhi JS. Ek language seekho, full-stack developer ban jao. Java + Spring Boot wale full-stack ko 2 languages handle karni padti hain — Java aur JavaScript. Node.js wale ek hi mein dono kaam kar sakte hain. Productivity zyada, switching cost zero.
Node.js akele bahot powerful hai, but real-world mein Express.js framework ke saath use hota hai. Express HTTP server, routes, middleware sab simplify karta hai. Iske upar database — MongoDB (NoSQL) ya PostgreSQL (SQL) — laga ke aap REST API banate ho. JWT authentication, file uploads, payment integration, email sending — sab Node.js + Express se hota hai.
Indian context mein Node.js ki demand high hai. Naukri.com pe 'Node.js' ke 18,000+ openings active hain. Freshers Node.js + Express + MongoDB stack mein ₹4-7 LPA, mid-level (2-4 saal) ₹8-15 LPA, senior backend ₹15-30 LPA. MERN stack (MongoDB + Express + React + Node) developers ko aur premium milta hai because full-stack ho jaate hain.
Node.js seekhne ki prerequisite hai — solid JavaScript fundamentals. Agar JS aati hai toh Node.js 4-6 hafte mein cover ho jaata hai. Agar JS hi confuse karti hai toh pehle 2 mahine JS pe lagao.
