As Blake mentioned, it would be helpful to understand your ultimate goal.

If your real goal is to ensure the two values match rather than having a manual review step, then you can do this using the built-in validation library.

You could try something like this instead

$(document).ready(function(){
  // custom validator for email confirmation
  window.Parsley.addValidator('emailconfirmation', {
    validateString: function(value, requirement, field) {
      var email = $('.email input').val().toLowerCase();
      var confirm = $('.emailconfirm input').val().toLowerCase();
      
      return (email == confirm || email == '' || confirm == '');
    },
    messages: {
      en: 'Email addresses do not match.',
    }
  });
  
  // assign validator to email confirmation field
  $('.emailconfirm input').attr('data-parsley-emailconfirmation','');
}

This code leverages the parsley validation library used in the classic form designer to create a custom validation rule and apply it to the "confirmation" input.

This will check if the two values match any time the confirmation field value changes, and if they do not match the error will prevent form submission.

Adjustments may be required if email entry is optional.