promise.js

function foo(){
    return Promise.all(["http://jsonplaceholder.typicode.com/posts/1", "http://jsonplaceholder.typicode.com/comments/1"]);    
}
function task2(e){
    alert("In two got " + e);
    return " Two ";
}
function task3(e){
    alert("In three got " + e);
    return " Three ";
}
var p = foo();
p.then(task2);
p.then(task3);