Insert HTML (WYSIWYG editor) into databse (rich text)

Hi I am trying to insert html element into my database when other inputs get submitted. Im struggling to create javascript for the page.

Here is my code for HTML:

<!DOCTYPE html>
<html>
<head>
  <script src="https://cdn.tiny.cloud/1/no-api-key/tinymce/5/tinymce.min.js" referrerpolicy="origin"></script>  
    <script type="text/javascript">
  tinymce.init({
    selector: '#myeditablediv',
  plugins: ' advlist  casechange formatpainter lists checklist media mediaembed pageembed permanentpen table advtable link image wordcount visualblocks media quickbars pagebreak restoredraft charmap autosave placeholder  ',
  quickbars_insert_toolbar: false,
  quickbars_selection_toolbar: false,
    inline: true,
  toolbar: ' restoredraft | h1 h2 h3 h4 h5 h6 |  bold italic underline   |alignleft aligncenter alignright | upload |formatting2 | bullist numlist casechange  | outdent indent  | formatpainter blockquote pagebreak    ',
  contextmenu: 'undo redo | inserttable  | cell row column deletetable wordcount',
  toolbar_groups: {
    formatting2: {
      icon: 'superscript',
      tooltip: 'Formatting',
      items: ' strikethrough subscript superscript '},
    upload: {
      icon: 'upload',
      tooltip: 'Insert or Upload',
      items: 'link quickimage media | quicktable pageembed | charmap  '},
        },
  menubar: false,
  toolbar_mode: 'floating',
  placeholder: 'Write here
  forced_root_block : true,
  
  mobile: {
    plugins: ' advlist  casechange formatpainter lists checklist media mediaembed pageembed permanentpen powerpaste table advtable link image wordcount visualblocks media quickbars pagebreak restoredraft charmap autosave placeholder   ',
    quickbars_insert_toolbar: 'link quickimage media' ,
    quickbars_selection_toolbar: false,
    toolbar: ' restoredraft | h1 h2 h3 h4 h5 |  bold italic    |alignleft aligncenter | upload | bullist numlist casechange  | blockquote     ',
    inline: true,
  }
  });
 
  </script>
</head>

<body>
 <form method="post">
    <div id="myeditablediv" style="min-height: 100px; outline-style: none;" ></div>
  </form>
</body>
</html>

And here is my page code:

import wixData from 'wix-data';

export function button1_click(event, $w) {

  $w("#html1").postMessage(" ");
  $w("#html1").onMessage((event) => {
    $w("#dataset2").setFieldValue("body", event.data);
    $w("#dataset2").save();
  });
}

It seems I need some help with adding some code in HTML. Please help me out!