JSFiddle - React, Tailwind, and code Playground

HTML

<div class="class_test" id="id_test">
    
<h2>testing</h2>

    <img/>
    <div class="rightBox">
        
<h4>test</h4>

        <p>test</p>
    </div>
</div>

JavaScript

$(function () {
    $("#id_test > img").prop('src', 'http://jsfiddle.net/favicon.png');
    $("#id_test > img").prop('height', '100');
    $("#id_test > img").prop('width', '100');
});
/*
var elm = document.getElementById('id_test');
var first = elm.getElementsByTagName("img")[0];
first.src = "http://jsfiddle.net/favicon.png";
first.style.height = '100px';
first.style.width = '100px';
*/