Promises

Question 1

What is the Promise signature?

Answer 1

var p = new Promise( function (resolve, reject) { 
   // do something possibly asyn
   // if it works, call resolve()
   // if not, reject()
 } );

Question 2

How do you use a promise with then?

Answer 2

if p is a Promise:
p.then( function(result) {
    // success!
}, function(err) {
    // fail!
} )

Question 3

if getJSON() returns a promise, use async/await to log the response with a function called getAsync()

Answer 3

getAsync = async () => console.log( await getJSON() )

Question 4

If p is a promise, use then to log the response when ready.

Answer 4

p.then(function(success) {
console.log(success);
}, function(err) {
// error
});