end-of-stream 1.4.4

The "end-of-stream" is a valuable node module used in the application of JavaScript programming. It performs a simple yet crucial task of calling a callback function when a readable, writable or duplex stream has either completed or encountered a failure. This could be instrumental in dealing with real-time data flows in server-side programming where recognizing the end of a data stream is critical.

The use of "end-of-stream" is very direct and straightforward. To begin with, you must first install the module through npm using npm install end-of-stream. Upon successful installation, the module can be utilized by importing it to your JavaScript code with var eos = require('end-of-stream');. By following the established syntax, this subsequently allows you to call the callback function at the end of various types of data streams. The syntax for using "end-of-stream" differs depending on the stream type and event listened to as showcased by the following examples:

var eos = require('end-of-stream');

// For a readable stream
eos(readableStream, function(err) {
  if (err) return console.log('stream had an error or closed early');
  console.log('stream has ended', this === readableStream);
});

// For a writable stream
eos(writableStream, function(err) {
  if (err) return console.log('stream had an error or closed early');
  console.log('stream has finished', this === writableStream);
});
...

In terms of its documentation, the "end-of-stream" package can be referred to via the npm directory, which typically has extensive information for most node modules. However, for a detailed overview of the "end-of-stream" module, you can visit the GitHub repository for comprehensive information including usage examples and related utilities. The GitHub repository for "end-of-stream" is git://github.com/mafintosh/end-of-stream.git.