JSFiddle - React, Tailwind, and code Playground

HTML

<div class="event"><img src="starter source">Event Name</div>
<a href="#" id="get">Get Source</a><br /><a href="#" id="set">Set Source to "new source"</a>

JavaScript

$('#get').on('click', function () {
    alert($('.event').children('img').attr('src'));
});
var counter = 1;
$('#set').on('click', function () {
    $('.event').children('img').attr('src',  'new source (' + (counter) + ')');
    counter++;
});