NODE JS

Node.js is a free, open-source, cross-platform JavaScript runtime environment that allows developers to execute JavaScript code outside of a web browser. Built on Google Chrome's V8 JavaScript engine, it is primarily used for building fast, scalable server-side applications and networking tools.

Key Technical Features Asynchronous & Non-Blocking: Node.js uses an event-driven architecture. Instead of waiting for a task (like reading a file) to finish before moving to the next, it continues processing other requests and uses callbacks to signal completion. Single-Threaded Event Loop: It operates on a single thread but can handle thousands of concurrent connections efficiently by offloading I/O operations to the system kernel via the libuv library. JavaScript Everywhere: It enables "full-stack" development, allowing developers to use a single programming language for both the frontend (browser) and backend (server).

Core Ecosystem npm (Node Package Manager): The default package manager for Node.js, hosting the world's largest ecosystem of open-source libraries. Built-in Modules: Includes native support for File System operations, Networking (HTTP/HTTPS), Cryptography, and more. TypeScript Support: Recent versions (v22.6.0+) include native support for executing TypeScript files without a separate compilation step.

Common Use Cases Real-Time Applications: Chat apps, online gaming, and collaboration tools (e.g., Slack, Discord). REST APIs & Microservices: Building scalable backend services for web and mobile apps. Streaming Services: Efficiently handling data-intensive tasks like video or audio streaming. CLI Tools: Creating command-line utilities and automation scripts.