AjaxSimulatorWithNestedCalls.js

// jQuery Ajax simulator

var $ = {
    ajax: function(opts, returnData, throwError) {
        console.log(`Request URL: ${opts.url}`);
        console.log(`Request data: ${opts.data}`);

        var timer = Math.round() * 10 + 1;

        if (throwError && typeof opts.error === 'function') {
            setTimeout(function() {
                opts.error({
                    errorMessage: 'AJAX Request Error!'
                });
            }, timer);

            return;
        }

        if (typeof opts.success === 'function') {
            setTimeout(function() {
                opts.success(returnData);
            }, timer);
        }
    }
};

// Usage scenario with nested AJAX calls

$.ajax({
    url: 'http://example.com/auth',
    method: 'GET',
    success: function(data) {

        console.log('Response data: ' + JSON.stringify(data));

        $.ajax({
            url: 'http://example.com/profile',
            method: 'POST',
            data: data.id,
            success: function(data) {
                console.log('User info: ' + JSON.stringify(data));
            },
            error: function(err) {
                console.log(console.log(err));
            }
        }, {
            name: 'Karlen'
        });

    },
    error: function(err) {
        console.log(err);
    }
}, {
    id: 24
});