Google Apps Script: Global Variable

PropertiesService.getScriptProperties().setProperty('last_func', 'onClick');

var lastFunc = PropertiesService.getScriptProperties().getProperty('last_func');switch (lastFunc) {  case "onClick":    // do something    break;  case "onTest":    // do something    break;}

var lastFunc = null;function onClick() {    lastFunc = 'onClick'    // call authorization}function authCallback(request) {    if (lastFunc != null) { // lastFunc is null during a authorization callback        // do something        lastFunc = null    }}