autosave.js

TXTextControl.addEventListener("ribbonTabsLoaded", function (e) {
    restoreDocument();
    var intervalAutoSave = setInterval(autoSaveDocument, 5000);
});

function autoSaveDocument() {
    TXTextControl.saveDocument(TXTextControl.streamType.InternalUnicodeFormat, function (e) {
        localStorage.document = e.data;
    });
}

function restoreDocument() {
    if (localStorage["document"]) {
        TXTextControl.loadDocument(
            TXTextControl.streamType.InternalUnicodeFormat,
            localStorage.document);

        $(".info").css("display", "inline-block");
    }
}