Jquery XML manipulation in Cordova

I am trying to edit xlsx files in cordova based ios application. I use javascript for making changes the the OOXML of xlsx sheets. I notice a strange behavior when I try to make changes to xml from js within cordova. I have created a fiddle and I works fine. But when I use same approach in the below code, xml is not getting changes. Can any one point out where I am going wrong here.

Working fiddle -> http://ift.tt/1E9L0p8

Code where it is not working

WorkbookAccess.prototype.loadStringDataIntoSheets = function(workBookData) {
console.log("Enter @loadStringDataIntoSheets");
console.log('@--1');
var loadStringDef = $.Deferred();
//var thisClass = this;

this.loadXLSX().then( function() {

    console.log('@--1.1');

    if (workBookData.length == 0) {
        console.log('@--2');
        loadStringDef.resolve();
        return loadStringDef.promise();
    }

    var shareStringFile = this.xlsxFile + "/" + this.getSharedStringPath();
    var sharedStringFileIO = new SuperFileIO();
    console.log("shareStringFile " + shareStringFile);
    sharedStringFileIO.readFromFile(shareStringFile, function(xmlText) {
        console.log('@--3');
        var ssXmlDoc = $.parseXML(xmlText);
        for (var i = 0; i < workBookData.length; i += 1) {
            console.log('@--4');
            var sheetPath = this.getSheetPath(workBookData[i].sheetName);
            var path = sheetPath;
            var rootNode = "worksheet";
            var sheetFile = this.xlsxFile + "/" + path;
            var fileIO = new SuperFileIO();

            fileIO.readFromFile(sheetFile, function(i, sheetFile, workSheetData, ssXmlDoc, xmlText) {
                (function() {
                    console.log('@--5');

                    console.log("i: " + i);
                    console.log("sheetFile: " + sheetFile);
                    console.log("workSheetData: " + JSON.stringify(workSheetData));

                    var xmlDoc = $.parseXML(xmlText);
                    for (var j = 0; j < workSheetData.length; j += 1) {

                        console.log("workSheetData[j] " + JSON.stringify(workSheetData[j]));

                        var cellAddrToSet = workSheetData[j].colLetter + workSheetData[j].rowIndex;
                        var newStringPosition = $(ssXmlDoc).find("si").size();

                        console.log("newStringPosition ### " + newStringPosition);

                        $(ssXmlDoc).find("sst").append('<si><t>' + workSheetData[j].value + '</t></si>');
                        $(xmlDoc).find('c[r=' + cellAddrToSet + ']').empty().append('<v>' + newStringPosition + '</v>').attr("t", "s");

                        var newSheetData = (new XMLSerializer()).serializeToString(xmlDoc);
                        var newSharedStringSheetData = (new XMLSerializer()).serializeToString(ssXmlDoc);

                        console.log("======");
                        //console.log(newSharedStringSheetData);
                        //console.log(newSheetData);
                        console.log("======");
                    }

                    var newSheetData = (new XMLSerializer()).serializeToString(xmlDoc);
                    //newSheetData = newSheetData.split('xmlns="http://ift.tt/lH0Osb"').join('');
                    var fileIO = new SuperFileIO();
                    fileIO.writeToFile(sheetFile, newSheetData, false);

                    var newSharedStringSheetData = (new XMLSerializer()).serializeToString(ssXmlDoc);
                    //newSharedStringSheetData = newSharedStringSheetData.split('xmlns="http://ift.tt/lH0Osb"').join('');
                    var fileIO1 = new SuperFileIO();
                    fileIO1.writeToFile(shareStringFile, newSharedStringSheetData, false);

                    if (i + 1 == workBookData.length) {
                        console.log('@--6');
                        // Time out for file to get saved
                        setTimeout(function() {
                            console.log("loadStringDataIntoSheets resolved");
                            loadStringDef.resolve();
                        }, 100);
                    }
                })();
            }.bind(this, i, sheetFile, workBookData[i].data, ssXmlDoc));
        }
    }.bind(this));
}.bind(this));

return loadStringDef.promise();

};