ES6 Promises

LunchNLearn-ES6Promises.js

var oneSecondCall = function(resolve, reject) {
  setTimeout(resolve, 1000, 1);
};

var twoSecondCall = function(resolve, reject) {
  setTimeout(resolve, 2000, 2);
};

var threeSecondCall = function(resolve, reject) {
  setTimeout(resolve, 3000, 3);
};


var testPromise = new Promise (oneSecondCall);
var secondPromise = new Promise (twoSecondCall);
var thirdPromise = new Promise (threeSecondCall);
var errorPromise = new Promise(function(resolve, reject) { reject(3);})

testPromise
  .then(function(val) { console.log(`Done with ${val}`); })
  .catch(function(errors) { console.log(`Errors ${errors}`); });

Promise.all([testPromise, secondPromise, thirdPromise])
  .then(function(values) { console.log(` All Promises done with values ${values}`); })
  .catch(function(errors) { console.log(`Errors ${errors}`); });

Promise.race([testPromise, secondPromise, thirdPromise])
  .then(function(values) { console.log(` All Promises done with values ${values}`); })
  .catch(function(errors) { console.log(`Errors ${errors}`); });

Promise.all([testPromise, secondPromise, thirdPromise, errorPromise])
  .then(function(values) { console.log(` All Promises done with values ${values}`); })
  .catch(function(errors) { console.log(`Errors ${errors}`); });