Promise API

promise-api.js

server.getData(url)
.then(function(result) {
    // this code block runs when the
    // promise gets fulfilled.
    
    ctrl.myData = result;
})
.catch(function(error) {
    // this code block runs when there
    // is an error encountered or if the
    // promise was rejected. 
    
    console.log('Something went wrong');
    console.log(error);
})
.finally(function() {
    // this code block runs in all cases
    // and can be helpful to run clean up
    // type tasks.
    
    server.closeConnection();
});