simple jQuery Deferred example

jquery.deferred.promise.js

function getData() {
    const deferred = $.Deferred();
    API.ajax({
	url: [URL],
	type: "GET",
	dataType: "json",
	headers: {
	    'Accept-Language': uiCulture
	}
    }).done((data: any) => {                
	deferred.resolve(data);

    }).fail((data: any) => {
	deferred.reject(data);
    });

    return deferred.promise();
}

getData().done(function(value) {
    alert(value);
});