return_remote_data_promise.js

function getPromiseRemoteData(url){
	var promiseRemoteData = new Promise(function(resolve,reject){
			// Initiate call
			//var XMLHttpRequest = require("xmlhttprequest").XMLHttpRequest; //Uncomment this line if you are using it in node js environment.

			// 1. Create the request
			var xhr = new XMLHttpRequest();
			
			// 2. Create the URL
			var delay = Math.floor(Math.random() * 9) + 1;

			// Open the URL
			xhr.open("GET", url + "?delay="+delay, true);

			// Specify what should be done after the remote call
			xhr.onload = function(){

				var remoteResponseText = xhr.responseText;
				var remoteObject = JSON.parse(remoteResponseText)

				remoteObject.isValid = function(){
					return this.hasOwnProperty('data');
				}

				if (remoteObject.isValid()){
			   		resolve (remoteObject); // THIS SHOULD RETURN DATA	
				} else {
					reject("Invalid record");
				}
			};
			xhr.send();	
	});

	return promiseRemoteData;
}