Logging and Alerts

/**
 * Log message to server
 * @param {any} s Value to display
 */
const log = (s) => Logger.log(s);

/**
 * Create pop-up message to notify user.  Log if in debugging mode and can't alert.
 * 
 * @param {string} s Text to display
 */
const alert = (s) => {
  try {SpreadsheetApp.getUi().alert(s);} 
  catch {log(s);}
}