How to parse HTML formated

really that’s running good, not error, just display JSON.

I have read tutorial on
https://discourse.cakephp.org/t/how-to-make-simple-jquery-ajax-in-cakephp-3-7/5834

and

in ctp
the logic that I’m expect is value of variable $article->Isi
send to jQuery to parse HTML formated

<div id="parseHTML">
</div>
<!-- parser HTML -->
<script type="text/javascript">
 jQuery(document).ready(function() {
   var tampil = $("#parseHTML");
   var parse = '<?= Router::url(["controller" => "articles","action" => "view"]); ?>';
   var konv = $.parseHTML(parse);
   
   $.ajax({
      type:'post',
	  url:parse,
	  data:'&type=parseHTML',
	  dataType:'json',
	  success:function(){
		tampil.append(konv);
	});
  });
</script>
<!-- //parser HTML -->

but the goal, doesn’t I’m expect. I wanto view article there’s formated HTML content identation, paragraf, align justify, bold and underline. For easy to reading