jspdf in Chrome packaged app : document.writeln() not available

I'm developing a Chrome App, and i would like to allow the user to export as a PDF a few HTML Table. I made some research and i found jsPdf as the plugin i needed. And now comes my issue. jsPDF and its function "fromHTML" use the method "document.writeln()" which is not available in Chrome Packaged App.

"Uncaught Error: document.writeln() is not available in packaged apps."

Console error as jspdf tries to use document.writeln()

I've made a ton a research over the inteet, and found that there are some ways to counter that issue, by adding some "document.create". But while i don't know how jspdf works, i don't really know what to create.

There is the part of jspdf that's causing the issue :

var $frame, $hiddendiv, framename,  visuallyhidden;

framename = "jsPDFhtmlText" + Date.now().toString() + (Math.random() * 1000).toFixed(0);

visuallyhidden = "position: absolute !important;" + "clip: rect(1px 1px 1px 1px); /* IE6, IE7 */" + "clip: rect(1px, 1px, 1px, 1px);" + "padding:0 !important;" + "border:0 !important;" + "height: 1px !important;" + "width: 1px !important; " + "top:auto;" + "left:-100px;" + "overflow: hidden;";

$hiddendiv = document.createElement('div');
$hiddendiv.style.cssText = visuallyhidden;
$hiddendiv.ierHTML = "<iframe style="height:1px;width:1px" name="" + framename + "" />";
document.body.appendChild($hiddendiv);

$frame = window.frames[framename];
$frame.document.open();
$frame.document.writeln(element);//This causes "Uncaught Error: document.writeln() is not available in packaged apps."
$frame.document.close();
retu $frame.document.body;

And here is my call of the jspdf library, maybe i made a mistake here :

$('#exportMonth').click(function(){
    console.log(TAG + "Starting rendering as PDF");

    var doc = new jsPDF();
    specialElementHandlers = {
        // element with id of "bypass" - jQuery style selector
        // here i've nothing to bypass, so nothing is 'bypassme'
        '#bypassme': function(element, renderer) {
            // true = "handled elsewhere, bypass text extraction"
            retu true
        }
    };
    //the id 'month' refers to a div containing a html Table
    doc.fromHTML($('#month').html(),15,15 ,{
        width:600,
        elementHandler:specialElementHandlers
    });
    doc.save('Tst.pdf');

    console.log(TAG + "Should be done");
});

I'll continue my research but i'm really lost rigth now, i really need your help !

I may have forgotten to say some things, just let me know and i'll try to be as quick as possible fixing that.

Many thanks !