Can someone provide me a sample script for a google form to auto fill the question description with the prior response?

Question

I need to have the last response to a question listed as the description of the question. I am using google forms for collecting readings from hour totalizers in a factory. The worker collects the data by walking to each meter and records the current reading. I want them to be able to see the reading from the prior check so they can compare.
Is this possible?

Answer 1

You can link a script to your Form and put the following code in there:

function formSubmitted(e) {
  var responsesObj = e.response;
  var responsesList = responsesObj.getItemResponses();

  for(var i=0; i<responsesList.length; i++) {
    var responseObj = responsesList[i];
    var responseText = responseObj.getResponse();
    var question = responseObj.getItem();
    question.setHelpText(responseText);
  }
}

Then, you can manually set a Form submit trigger [1] so when a response to the form is sent it'll run the formSubmitted function with the Event Object [2]. From that object you can get the FormResponse object and make the manipulations you need to your form using the Forms Service functions [3].

[1] https://developers.google.com/apps-script/guides/triggers/

[2] https://developers.google.com/apps-script/guides/triggers/events

[3] https://developers.google.com/apps-script/reference/forms/form-app