JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//cloud.tinymce.com/stable/tinymce.min.js"></script>
<form method="post">
    <textarea id="mytextarea">Hello, World!</textarea>
  </form>

JavaScript

tinymce.init({
    selector: '#mytextarea',
    toolbar: 'fontsizeselect',
    fontsize_formats: '12pt 14pt 36pt'
  });