Better $.ajax requests—returning the promise/deferred object

betterajax4.js

// Generic function to make an AJAX call
var fetchData = function(query, dataURL) {
    // Return the $.ajax promise
    return $.ajax({
        data: query,
        dataType: 'json',
        url: dataURL
    });
}

// Make AJAX calls 
// 1. Get customer order
// 2  Get customer ID
var getOrder = fetchData(
    {
        'hash': '2528ce2ed5ff3891c71a07448a3003e5',
        'email': 'john.doe@gmail.com'
    }, '/path/to/url/1'),
    getCustomerID = fetchData(
    {
        'email': 'john.doe@gmail.com'
    }, '/path/to/url/2');
    
// Use $.when to check if both AJAX calls are successful
$.when(getOrder, getCustomerID).then(function(order, customer) {
    console.log(order.data);
    console.log(customer.data);
});