What is Node.js? Nedir?
Node.js is an open-source runtime environment built on Chrome's V8 engine that enables JavaScript to run on the server side.
Node.js was developed by Ryan Dahl in 2009. By bringing Chrome's V8 JavaScript engine outside the browser, Node.js made it possible to use JavaScript on the server side. This enabled frontend and backend development in the same language. Node.js's most important feature is its event-driven, non-blocking I/O model. It can efficiently manage thousands of concurrent connections through the event loop on a single thread. This architecture is ideal for real-time applications and high-traffic APIs. npm (Node Package Manager) is the world's largest software registry, hosting over 2 million packages. Express.js, Fastify, NestJS frameworks, Prisma and Sequelize ORMs, and real-time communication libraries like Socket.io are part of the Node.js ecosystem. Netflix, PayPal, LinkedIn, Walmart, and NASA use Node.js. Microservice architectures, REST APIs, GraphQL servers, real-time applications, and CLI tools are Node.js's primary use areas.
Use Cases
REST and GraphQL API development, Real-time applications (chat, gaming), Microservice architectures, CLI tools, Server-side rendering
Pros
Full-stack development with JavaScript, Massive npm ecosystem, High concurrency performance, Active and large community, Fast development process
Cons
Weak in CPU-intensive tasks, Risk of callback hell, Single-thread limitation, Variable library quality (npm security)
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