Plugin Ninja Forms: How to manipulate the Multi Step form via script?

<script type="text/javascript">
jQuery(document).on( 'nfFormReady', function( e, layoutView ) {

setInterval(function() {
  jQuery('.checklist').hide();
  
  if(!jQuery("#nf-field-566").val()){
    jQuery('.checklist').hide();
  } else {
    jQuery('.checklist').show();
  }
}, 1000);	

});
</script>