JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//code.jquery.com/ui/1.10.4/jquery-ui.js"></script>
<link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css">
<textarea></textarea>

CSS

.resizing {
    background: #f2f2f2;
    border: 1px solid #4cf;
}

JavaScript

$("textarea").resizable({
    resize: function() {
        //alert('resized');
        $(this).addClass('resizing');
    },
    stop: function() {
        $(this).removeClass('resizing');
    }
});