proback.js

proback.js - dependency-free very minimal helper for APIs with Promise/callback dual design

========

proback.js is an extremely tiny helper library to help the creation of APIs where functions are aimed to enable Promise-based and callback-based usage as well.

Usage Rules

Usage

Command line:

npm install proback.js --save

In JS code:

	var Proback = require('proback.js');
	...
	// your service. If callback is present, works as expected, If not, promise will be provided.
	function yourService( data, callback ){
		new Promise( function (resolve, reject) {
			//some callback is needed?
			object.fnCallWithCallback( data, Proback.handler( null, resolve, reject ) )
		}).then( function (res) {
			expect(res).to.equal('Done.')
			done()
		})
	}

	var Proback = require('proback.js');
	...
	// your service. If callback is present, works as expected, If not, promise will be provided.
	function yourService( data, callback ){
		return new Promise( function (resolve, reject) {
			//some callback is needed?
			object.fnCallWithCallback( data, function (err, res) {
				if (err) return Proback.rejecter(err, null, reject)
				// some operation
				return Proback.resolver(res, null, resolve)
			} )
		}).then( function (res) {
			expect(res).to.equal('Done.')
			done()
		})
	}