Node.js® is a free, open-source, cross-platform JavaScript runtime environment that lets developers create servers, web apps, command line tools and scripts.

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Node.js® is a free, open-source, cross-platform JavaScript runtime environment that lets developers create servers, web apps, command line tools and scripts.

Node.js® is a free, open-source, cross-platform JavaScript runtime environment that lets developers create servers, web apps, command line tools and scripts.

An example of a web server written with Node.js which responds with 'Hello, World!': Commands in this document start with $ or > to replicate how they would appear in a user's terminal.

Node.js v22 empowers applications to seamlessly interact with WebSocket servers as clients, but the creation of WebSocket servers within Node.js remains dependent on established libraries.

Node.js 22 will enter long-term support (LTS) in October, but until then, it will be the "Current" release for the next six months. We encourage you to explore the new features and benefits offered by this …

There is a set of environment variables that can be defined to customize the behavior of Node.js, for more details refer to the CLI Environment Variables documentation.

Let's walk through a simple example to demonstrate how code coverage works in Node.js. Note: This example, and all other ones in this file, are written using CommonJS.

Welcome to the official API reference documentation for Node.js! Node.js is a JavaScript runtime built on the V8 JavaScript engine.