next.io

next.io

No more hell. Callbacks made easy, with error handlers and more.

##Deprecated: This project has been discontinued.

This was an experiment to understand how to run callbacks one by one, without nested functions. You can continue using the next.io package. But, I recommend you use async for production projects.

Unit test command (require mocha):

Install mocha globally:

npm install -g mocha

Unit test command:

npm test

Using next.io:

Simple use:

Preparing:

var next = require ('next.io');
var to = next();

Running async functions:

to.do('data input', //required, ever you can use null
  function (data, next) {
    //some async
    next(output);
  },
  function (data, next) {
    //some async
    next(output);
  },
  function (data) {
    //whatever you want
  }
);

Use with handlers

Preparing:

var next = require ('next.io');
var to = next({ // handlers
  error: function (data) {
    //do something
  }
});

Running async functions with error handlers:

to.do('data input', //required, ever you can use null
  function (data, next) {
    //some async without possible errors
    next(output);
  },
  function (data, next, error) {
    //some async with possible errors
    if (err) {
    error('error', err) // 'error' is a handler name
    } else {next(output);}
  },
  function (data) {
    //whatever you want
  }
);

Example:

var fs   = require ('fs');
var next = require ('next.io');
var to   = next({

  error: function(data) {
    console.log('ERROR: ' + data);
  }
});

function readFile (path, next, error) {
  fs.readFile(path, 'utf-8', function (err, data) {
    if (err) {
      error('error', err)
    } else {
     next(data);
    }
  });
};

function consoleFile (data) {
  console.log(data);
};

to.do('./example.txt', readFile, consoleFile);