how to make an ajax call on BB10 native (JS) side

main_qml_extract.js

//ajax call on BB10 JS side, based on jquery $.ajax options
function handleAjaxCall(options,callback){
    var url= options.url;
    var type= (options.type in [ 'POST', 'GET' ]) ? options.type : "GET"; //default to GET
    var data = options.data ? options.data : {}; //default to empty params
    
    var request = new XMLHttpRequest();
    request.onreadystatechange=function() {
        if(request.readyState === XMLHttpRequest.DONE) {
            if (request.status === 200) {
                console.log("Response = " + request.responseText);
                try{
                	var response = JSON.parse(request.responseText);
                }catch(e){
                	var response = request.responseText;
                }
                var params={
                    success : true,
                    data : response
                }
                callback(params);
            }
            else {
                // This is very handy for finding out why your web service won't talk to you
                console.log("Status: " + request.status + ", Status Text: " + request.statusText);
                var params = {
                    error: true,
                    req: request,
                    err : request.statusText
                }
                callback(params);
            }
        }
    }
    var encodedString = encodeURIComponent(data);
    request.open(type, url, true); // only async supported
    // You might not need an auth header, or might need to modify - check web service docs
    //request.setRequestHeader("Authorization", "Bearer " + yourAccessToken);
    // Post types other than forms should work fine too but I've not tried
    request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    // Form data is web service dependent - check parameter format
    var requestString = "text=" + encodedString;
    request.send(requestString);
}