How do you get URL parameters in a Google Form using Google Apps Script?

Question

So I\'ve got a Google Form where I\'d like to pass in a parameter from an email link like this:

https://docs.google.com/URL/forms/d/LONGSTRING/viewfor

Answer 1

I am assuming you are trying to get the form id?

You will need to set up a trigger that will run on form submit.

function onSubmit(){

  var form = FormApp.getActiveForm();
  var formID = form.getId();

}

Answer 2

I think you can't use your own id, you have to use the id of the Google Form's "Item" object. You can figure out the id by viewing a prefilled form. In the Form edit screen, click "Responses", "Get Pre-filled URL". Fill in the field that you want to use and click Submit. On the new page, you are given a URL in "Share this link to pre-fill the responses" . Examine that url and you can see "get" arguments like ?entry.265525444=mytext . Replace mytext with whatever you want to be in the field.

This will display the field on your form, however. I myself was searching for how to make such a field readonly or invisible when I got here, but I hope this shows you a new direction to try.