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Node.js

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description Node.js Overview

Node.js is a server-side JavaScript runtime environment built upon Google’s V8 JavaScript engine. It enables developers to utilize JavaScript for backend application development, offering an event-driven, non-blocking architecture ideal for creating scalable and high-performance network applications. Primarily used by full-stack JavaScript developers and those building enterprise-level solutions requiring stability and production readiness.

help Node.js FAQ

What is Node.js used for?

Node.js lets developers run JavaScript outside the browser, most often for web servers, APIs, command-line tools, build systems, and real-time apps. It is built on Google's V8 JavaScript engine.

Is Node.js single-threaded?

Node.js runs JavaScript on a main event loop, which is why people describe it as single-threaded for application code. Under the hood, it also uses libuv and worker threads for tasks such as file I/O and some CPU work.

What is npm in the Node.js ecosystem?

npm is the package manager commonly installed with Node.js. It gives developers access to packages such as Express, React build tools, TypeScript tooling, and testing libraries.

How is Node.js different from browser JavaScript?

Browser JavaScript controls web pages through APIs like the DOM, while Node.js provides server-side APIs for files, networking, processes, and streams. The same language can be used, but the runtime environment is different.

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