fs.lchown(path, uid, gid, callback) Asynchronous lchown(2). No arguments other than a possible exception are given to the completion callback.

vm.isContext(sandbox) Returns whether or not a sandbox object has been contextified by calling vm.createContext() on it.

process.uptime() Number of seconds Node.js has been running.

Stability: 2 - Stable A stream is an abstract interface implemented by various objects in Node.js. For example a request to an HTTP server is a stream, as is process.stdout. Streams are readable, writable, or both. All streams are instances of EventEmitter. You can load the Stream base classes by doing require('stream'). There are base classes provided for Readable streams, Writable streams, Duplex streams, and Transform streams. This document is split up into 3 sections: The first section e

socket.setKeepAlive([enable][, initialDelay]) Enable/disable keep-alive functionality, and optionally set the initial delay before the first keepalive probe is sent on an idle socket. enable defaults to false. Set initialDelay (in milliseconds) to set the delay between the last data packet received and the first keepalive probe. Setting 0 for initialDelay will leave the value unchanged from the default (or previous) setting. Defaults to 0. Returns socket.

Class: net.Server This class is used to create a TCP or local server. net.Server is an EventEmitter with the following events:

fs.chmod(path, mode, callback) Asynchronous chmod(2). No arguments other than a possible exception are given to the completion callback.

Applications running in Node.js will generally experience four categories of errors: Standard JavaScript errors such as: EvalError: thrown when a call to eval() fails. SyntaxError: thrown in response to improper JavaScript language syntax. RangeError: thrown when a value is not within an expected range ReferenceError: thrown when using undefined variables TypeError: thrown when passing arguments of the wrong type URIError: thrown when a global URI handling function is misused. System err

Stability: 2 - Stable A stream is an abstract interface implemented by various objects in Node.js. For example a request to an HTTP server is a stream, as is process.stdout. Streams are readable, writable, or both. All streams are instances of EventEmitter. You can load the Stream base classes by doing require('stream'). There are base classes provided for Readable streams, Writable streams, Duplex streams, and Transform streams. This document is split up into 3 sections: The first section e

crypto.getCurves() Returns an array with the names of the supported elliptic curves. Example: const curves = crypto.getCurves(); console.log(curves); // ['secp256k1', 'secp384r1', ...]