JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
<head>
<title>On Paste</title>
<script type="text/javascript">
var textareaElement;
var previewElement;

function update()
{
    previewElement.innerHTML = textareaElement.value;
}

window.onload = function() {
    textareaElement = document.getElementById('textarea');
    previewElement = document.getElementById('preview');
    textareaElement.onpaste = update    
}
</script>
</head>
<body>
<textarea id="textarea">
</textarea>
<div id="preview">
</div>
</body>
</html>