JSFiddle - React, Tailwind, and code Playground

HTML

<div id="popUpInnerArrowLeft">LeftArrow</div>
<br/>
<div class="outercontainer">
    <div class="thumbsInnerContainer">
        <ul>
            <li>Image</li>
            <li>Image</li>
            <li>Image</li>
            <li>Image</li>
            <li>Image</li>
        </ul>
    </div>
</div>
<br/>
<div id="popUpInnerArrowRight">RightArrow</div>

CSS

ul li {
    list-style:none;
    width:40px;
    height:40px;
    border:1px solid;
    float:left;
    padding:0;
    margin:0;
}
ul {
    padding:0;
    margin:0;
}
.outercontainer {
    width:150px;
    height:50px;
    border:1px solid red;
    overflow:hidden;
}
.thumbsInnerContainer {
    width:210px;
    position:relative;
}

JavaScript

$(document).ready(function() {
        $("body").click(function(event) {
            
            var a = "";
            a += event.target.nodeName ;
            $(event.target).parents().each(function(){
               a +=  " < "+$(this)[0].nodeName 
            });
            alert(a);
        });
    });