How to create Overwolf notification system

overwolf.windows.openAlert = function(content, autoCloseTimeout = 0) {
  overwolf.windows.openWindow("Alert", function(res) {
    overwolf.windows.getOpenWindows(function(openWindows) {
      var window_id = res.window_id;
      debugger;
      var w = openWindows['Alert'];
      //debugger;

      overwolf.utils.getMonitorsList(function(monitors) {
        var primaryMonitor = monitors.displays.find(d => {
          return d.is_primary;
        });

        if (primaryMonitor != undefined) {
          var x = primaryMonitor.width / 2 - 300;
          var y = 10;

          overwolf.windows.changePosition(window_id, x, y, function(ch) {
            if (ch.status == "success") {

              //setTimeout(function() {
                w.document.getElementsByTagName("main")[0].innerHTML = content;
              //}, 2*1000);              

              if (autoCloseTimeout != 0)
              {
                setTimeout(() => {
                    overwolf.windows.close(window_id);
                }, autoCloseTimeout);
              }
            }
          });
        }
      });
    });
  });
};

overwolf.windows.updateAlert = function(content) {
  overwolf.windows.getWindow("Alert", function(w) {
    if (w) w.document.getElementsByTagName("main")[0].innerHTML = content;
  });
};