onSubmit form validation
问题 I am working on Google Forms, I look into the available events and there are only two; open and onSubmit I want to stop form submission if one of my validation criteria fails that would be specified on my app script for the form onSubmit trigger. For example, I want to fetch the value of one of the fields and compare it to a list of values in a spread sheet if the value in the form is found in the spread value list then proceed to form submission otherwise prompt user to resubmit form. Is