What is the MERN stack and why is it so widely used?

This question describes the technologies in MERN and asks why it’s popular in modern full-stack JavaScript development.

The MERN stack comprises MongoDB, Express.js, React.js, and Node.js, enabling full-stack web development using JavaScript end to end ([turn0search0]turn0search6]turn0search12]). MongoDB stores data as JSON-like documents, Express.js handles backend routing on Node.js, React.js builds dynamic UIs, and Node.js provides the server runtime. Why it's popular: • Unified JavaScript across frontend and backend • Efficient JSON data flow from client to database • Excellent for modern Single-Page Applications (SPAs) and real-time apps • Rapid prototyping and scalable deployments ([turn0search48]turn0search54]) Category: Full Stack Web Development Tags: mern-stack, javascript, full-stack, nodejs, mongodb, react