Errc NPM | npm.io

errc

A different style of callbacks experiment written for an answer on Stack Overflow:

Why does node prefer error-first callback?

It allows you to register callbacks to standard Node functions that expect error-fist callback style, but use a different convention inside of your callback - the first argument to your callback will either be an instance of Error on failure (with its message field set to the original error) or the first non-error argument on success.

For code examples see node-errc-example on GitHub.

Installation

Install to use in your Node project, updating the dependencies in package.json:

npm install errc --save

Usage

var errc = require('errc');
var fs = require('fs');

fs.readFile('example2.txt', errc(function (data) {
  // here data is either an instance of Error on failure
  // or a real data on success
});