Main page, Custom Properties - App Maker, https://cafe.naver.com/eojji/332

onListFilesClick.gs

/**
 * https://developers.google.com/appmaker/tutorials/call-scripts/
 * @param {widget} widget - Button widget.
 * @param {event} 
 */
function onListFilesClick(widget, event) {
  var widgets = widget.parent.descendants;
  var from = widgets.TextBoxFromFolder.value;
  var to = widgets.TextBoxToFolder.value;


  google.script.run.withSuccessHandler(
    function(resp) {
      widget.root.properties.ssNameProperty = resp.name;
      widget.root.properties.ssUrlProperty = resp.url;
    }
  )
    .myListFiles(from, to);
}