How to update an event in Google Calendar using javascript?

Question

I need to update the name of some Google Calendar events, once I get them through JavaScript. I only have the sample code which Google shows in their Google Developer site,

Answer 1

5+ years after the question was asked, here is how I succeeded:

/**
 * changes transparency (i.e. Busy or Available) of event passed
 * 
 * @author dugBarnz
 * @version 1.0
 * @since 2021/01/11
 * @param {string} event id
 */
function zzChangeTransparency_(_calendarId, _eventId)
{
  var event = Calendar.Events.get(_calendarId, _eventId);
  if (event && event.transparency)
    event.transparency = "opaque";
  else
    event.transparency = "transparent";

  Calendar.Events.update(event, _calendarId, _eventId);
}