JSFiddle - React, Tailwind, and code Playground

HTML

<div id="div"></div>
<br>

<button>Get the height and width of the div</button>

CSS

#div {
    height: 200px;
    width: 400px;
    padding: 15px;
    margin: 5px;
    border: 2px solid #000;
    background-color: grey;
color:#fff;
}

JavaScript

$(document).ready(function(){
    $("button").click(function(){
        var txt = "";
        txt += "Width of div: " + $("#div").width() + "</br>";
        txt += "Height of div: " + $("#div").height();
        $("#div").html(txt);
    });
});