<!-- required files -->
<link href="../assets/plugins/quill/dist/quill.snow.css" rel="stylesheet" />
<script src="../assets/plugins/quill/dist/quill.js"></script>

<!-- html -->
<div id="editor1">
 ...
</div>

<!-- javascript -->
<script>
  const quill = new Quill('#editor1', {
    theme: 'snow',
    placeholder: 'Type something...'
  });
</script>