JSFiddle - React, Tailwind, and code Playground

HTML

<div class='gameBoardElementCls'>
    <div id='9' class='justForClickCls' style='z-index:10;position:absolute;margin:20px;width:80px;height:80px;'>test</div>
    <div class='gameBoardElementGreyCls'><img src='img/greygmelement.png' width='110px' height='110px' /></div>
</div>

<script>
    $("div.justForClickCls").mousedown(function () {
        alert('clicked 1');
    });
</script>