Finalization on the exit of the Node.js environment Module registration Working with JavaScript values Enum types

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 v25.2.1 Other versions 25.x 24.x LTS 23.x 22.x LTS 21.x 20.x LTS 19.x 18.x 17.x 16.x 15.x 14.x 13.x 12.x 11.x 10.x 9.x 8.x 7.x 6.x 5.x 4.x 0.12.x 0.10.x Options View on single page View as JSON …

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

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

The HTTP interfaces in Node.js are designed to support many features of the protocol which have been traditionally difficult to use. In particular, large, possibly chunk-encoded, messages.

The promise APIs use the underlying Node.js threadpool to perform file system operations off the event loop thread. These operations are not synchronized or threadsafe. Care must be taken when …

If the child process is a Node.js instance, the presence of an IPC channel will enable process.send () and process.disconnect () methods, as well as 'disconnect' and 'message' events within the child …

It can also be created by Node.js and passed to the user when a connection is received. For example, it is passed to the listeners of a 'connection' event emitted on a net.Server, so the user can use it to …

The default operation of the node:path module varies based on the operating system on which a Node.js application is running. Specifically, when running on a Windows operating system, the node:path …