function exportFile() {
 window.open("data:text/plain;charset=utf-8," + localStorage.WebAppData);
};

window.open("data:text/plain;charset=utf-8," + localStorage.WebAppData);

win = window.open("", "win")
win.document.body.innerText = "Line n breaks?"

win = window.open("", "win")
win.document.body.innerHTML = "<pre>Line n breaks?</pre>"

var data1 = "Line n break. And rn another one";
window.open("data:application/octet-stream, " + encodeURI(data1));

var data1 = "Line n break. And rn another one";
window.open("data:application/octet-stream;base64, " + btoa(data1));