JSFiddle - React, Tailwind, and code Playground

HTML

<div id="resizeable"></div>

CSS

#resizeable {
    resize: both;
    border: 1px solid black;
    overflow: auto;
    width: 200px;
    height: 200px;
}

JavaScript

var div = document.getElementById("resizeable");

div.onresize = function() {
    alert('resized');
};