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 …

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

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 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 …

1 day ago · 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 callback 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 …

1 day ago · 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 will internally queue up the data written to a socket and send it out over the wire when it is possible. The consequence of this internal buffering is that memory may grow.