JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cloud.tinymce.com/stable/tinymce.min.js"></script>
<textarea id="about">Hello World</textarea>
<br>
<button id="save">
  Save
</button>

JavaScript

tinymce.init({
	selector: '#about',
	plugins: "table autoresize autosave link image"
});

document.getElementById('save').addEventListener('click', function () {
	// Perform your ajax request
  tinymce.get('about').save();
});