JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://code.jquery.com/jquery-latest.min.js"></script>
<div id="content" contenteditable="true">this is some content</div>
<textarea id="target"></textarea>

CSS

#eetextarea {
     background-color: #EEEEEE;
     border: 1px solid #CCCCCC;
     width: 450px;
     height: 250px;
     overflow: auto;
     padding: 2px 5px;
 }
 #holder {
     width: 450px;
     height: 250px;
     resize: none;
 }

JavaScript

$("#content").on('keyup', function () {
    var value = $(this).html();
    $("#target").val(value);
})
.trigger('keyup');