Approval Process: 'e.parameter.approval' inside an "if" cycle - google-apps-script

Question

I'm trying to build an Approval flow with Google Apps Script. I would also like to add an "if" cycle that creates a Calendar event if e.parameter.approval is true.
So, everything works but the system doesn't recognize the "if" cycle. I've tried this:
function doGet(e){
var answer = (e.parameter.approval == 'true') ? 'Approved!' : 'Not this time';
MailApp.sendEmail(e.parameter.reply, "Request",
"The answer is: "+ answer);
// here I tried both with (e.parameter.approval === 'true') and (check === answer) and also with "=" "==" and "==="...
var check = 'Approved!';
if(e.parameter.approval === 'true'){
var calendar = CalendarApp.getCalendarById('xxxxxxx')
//create event
var newEventTitle = 'Event Test';
var newEvent = calendar.createAllDayEventSeries(newEventTitle,
Date,
CalendarApp.newRecurrence().addDailyRule().times(10),
{description:'test'});
//get ID
var newEventId = newEvent.getId();
}
var app = UiApp.createApplication();
app.add(app.createHTML('<p><br><h2>An email was sent to '+ e.parameter.reply + ' saying: '+ answer + '</h2>'))
return app
}
Do you have any idea why the system skips the "if" cycle and goes directly to "var app"?

Answer 1

e.parameter.approval might not be returning anything. I could be "undefined". It could be "null". You need to know for sure what e.parameter.approval is doing. There is also the possibility that the if condition is actually working, but then there is an error that kills the code and stops it. You'll need to debug every line. Try using the "debug" tool.
Apps Script Debugging Tool
You are using:
if(e.parameter.approval === 'true'){
The word 'true' is in quotes, which means it's a string value, not a true/false value.
Try:
if(e.parameter.approval === true){