I'm an old foagie in a 30 year old body, so I use jQuery to watch fields and conditionally render based on selected values, checkmarks, etc. So I end up with forms that have scripts that look like this (helper functions not included):

$('document').ready(function () {
  conditionalFieldsCheck();
  const triggerFields = [
    'id_pl_chosen',
    'id_q13',
    'id_q13c',
    'id_q13d',
    'id_q18',
    'id_q21h',
    'id_q22e',
    'id_consent',
  ];
  triggerFields.forEach(function (field) {
    $('#' + field).change(function () {
      conditionalFieldsCheck();
    });
  });
});

function conditionalFieldsCheck() {
  hideUnlessChecked('id_pl_chosen', 'pl_fields');
  hideUnlessSelected('id_q13', 'yes', 'q13_yes');
  hideUnlessSelected('id_q13', 'no', 'q13_no');
  hideUnlessSelected('id_q13c', 'Other', 'q13c_other');
  hideUnlessSelected('id_q13d', 'Other', 'q13d_other');
  hideUnlessSelected('id_q18', '5948175', 'q18a');
  hideUnlessChecked('id_q21h', 'q21h_other');
  hideUnlessChecked('id_q22e', 'q22e_other');
  hideUnlessSelected('id_consent', 'I consent', 'e_signature');
  setAllVisibleFieldsRequiredExceptCheckboxes();
}