test.js

TXTextControl.addEventListener("textControlLoaded", function (e) {
      // disable the loading progress dialog
      TXTextControl.isLoadingDialogEnabled = false;

      // restore the document
      restoreDocument();

      // set auto save to 500 milliseconds
    var intervalAutoSave = setInterval(autoSaveDocument, 500);
});

  TXTextControl.addEventListener("webSocketClosed", function (e) {
      // reload, if connection is lost
      location.reload();
  });

  TXTextControl.addEventListener("documentLoaded", function (e) {
      $("#txReconnectMsg").hide(); // show dialog
  });

  function autoSaveDocument() {
      // store the document in the session storage
      // which is shared over all browser tabs (complete session)
      TXTextControl.saveDocument(
          TXTextControl.streamType.InternalUnicodeFormat, function (e) {
              sessionStorage.document = e.data;
          }
      );
}

  function restoreDocument() {
      // if document exists, load it from the session storage
      if (sessionStorage["document"]) {

          $("#txReconnectMsg").show(); // hide dialog

        TXTextControl.loadDocument(
            TXTextControl.streamType.InternalUnicodeFormat,
              sessionStorage.document);
      }
      else
          $("#txReconnectMsg").hide(); // hide dialog
}