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index.js
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'use strict';
/**
* Created by baohg on 21/07/2016.
*/
var firstMethod = function() {
var promise = new Promise(function(resolve, reject){
setTimeout(function() {
console.log('first method completed');
resolve({data: '123'});
}, 2000);
});
return promise;
};
var secondMethod = function(someStuff) {
var promise = new Promise(function(resolve, reject){
setTimeout(function() {
console.log('second method completed');
resolve({newData: someStuff.data + ' some more data'});
}, 2000);
});
return promise;
};
var thirdMethod = function(someStuff) {
var promise = new Promise(function(resolve, reject){
setTimeout(function() {
console.log('third method completed');
resolve({result: someStuff.newData});
}, 3000);
});
return promise;
};
firstMethod()
.then(secondMethod)
.then(thirdMethod)
.then((someStuff)=>{
console.log(someStuff);
});