site/docs/layouts/shortcodes/render.html

{{ $url := .Get 0 }}
{{ $id := printf "__render_%v" .Ordinal }}
<div id="{{ $id }}">
  Loading {{ $url }}...
</div>
<script type="text/javascript">
  (function() {
    function renderContent(event) {
      var md = window.markdownit();
      var rendered = md.render(event.target.responseText);
      document.getElementById('{{ $id }}').innerHTML = rendered;
    }

    function loadContent(event) {
      var request = new XMLHttpRequest();
      request.addEventListener('load', renderContent);
      request.open('GET', '{{ $url }}');
      request.send();
    }

    window.addEventListener('load', loadContent);
  })();
</script>