JSFiddle - React, Tailwind, and code Playground

HTML

<div id="dvExpProvHolder" class="hidOverflow innerDivCenter">
		<ul class="uSPStyle" id="uSPStyle">
			<li class="setRelative">
				<a class="tfLink clickMe current" title="Care" data-toggle=".tfLink1" id="" href="javascript:void(0);"><img src="theImages/imgMenu.png" id="imgFirstM" class="imgExpCol" />Care</a>
				<ul class="uSPStyle uSPInner" style="width: 80%;">
					<li><a class="tfLink clickMe" title="This is sub" data-toggle=".tf1SLink1" href="javascript:void(0);">This is sub</a></li>
				</ul>
			</li>
			<li>
				<a class="tfLink clickMe" title="Breast Cancer" data-toggle=".tfLink2" href="javascript:void(0);"><img src="theImages/imgMenu.png" id="imgFirstM" class="imgExpCol" />BC</a>
				<ul class="uSPStyle uSPInner" style="width: 80%;">
					<li><a class="tfLink clickMe" title="OUR" data-toggle=".tf1SLink2" href="javascript:void(0);">OUR LINK</a></li>
				</ul>
			</li>
			<li>
				<a class="tfLink clickMe" title="About" data-toggle=".tfLink3" href="javascript:void(0);">About</a>
			</li>
			<li>
				<a class="tfLink clickMe" title="Anxiety" data-toggle=".tfLink4" href="javascript:void(0);">Anxiety</a>
			</li>
			<li>
				<a class="tfLink clickMe" title="Services" data-toggle=".tfLink5" href="javascript:void(0);">Services</a>
			</li>
		</ul>
	</div>

<div class="tfLink1 dispArtBody">
	<tfText01>This is for first link</tfText01>
</div>
<div class="tf1SLink1 dispArtBody hideContent">
	<tf1SText01>This is for first link sublink 1</tf1SText01>
</div>
<div class="tfLink2 dispArtBody hideContent">
	<tfText02>This is for second link</tfText02>
</div>
<div class="tf1SLink2 dispArtBody hideContent">
	<tf1SText02>This is for second link sublink 1</tf1SText02>
</div>
<div class="tfLink3 dispArtBody hideContent">
	<tfText03>This is for third link</tfText03>
</div>
<div class=" tfLink4 dispArtBody hideContent">
	<tfText04>This is for fourth link</tfText04>
</div>
<div class="tfLink5 dispArtBody hideContent">
	<tfText05>This is for fifth link</tfText05>
</div>
<br...

CSS

* {
    padding: 0;
    margin: 0;
    outline: 0;
    /*text-decoration: none;*/
    border: 0;
}
body {
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    font-family: 'Verdana', 'Tahoma', 'Arial';
    font-size: small;
    font-weight: normal;
	color: #333;
	text-rendering: optimizeLegibility;
	text-decoration: none;
}
html {
	background: #FFF no-repeat center center fixed;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    font-family: 'Verdana', 'Tahoma', 'Arial';
    font-size: small;
    font-weight: normal;
	color: #333;
	text-decoration: none;
}
img {
    border: 0;
    border-style: none;
}
.imgExpCol
{
	width: 13px;
	height: 13px;
	position: absolute;
	left: 1%;
	top: 2%;
	z-index: 1000;
}
.brClear {
    clear: both;
}
.brClearLeft {
    clear: left;
}
.hideContent {
	display: none;
}
.innerDivCenter {
    margin: 0 auto;
}
ul.uSPStyle {
    list-style-type: none;
    width: 95%;
    margin: 0px;
    padding: 0px;
    margin: 0 auto;
}
ul.uSPStyle li {
    display: block;
    margin-bottom: 1px;
    background: #FFF;
    text-transform: uppercase;
    border-bottom: 1px solid #D5D5D5;
}
ul.uSPStyle li a.current, ul.uSPStyle li a#current, ul.uSPStyle li a:hover {
    border-left: 4px solid #E55302;
    border-right: 4px solid #E55302;
    margin-left: -4px;
    margin-right: -4px;
    color: #e67e22;
    box-sizing: border-box;
    background: #FFEEE5;
}
ul.uSPStyle li a {
    padding: 10px 20px;
    line-height: 20px;
    text-decoration: none;
    display: block;
    position: relative;
    color: #175FA0;
    margin-left: 0px;
    margin-right: 0px;
    transition: color 300ms linear;
    -o-transition: color 300ms linear;
    -ms-transition: color 300ms linear;
    -moz-transition: color 300ms linear;
    -webkit-transition: color 300ms linear;
}
.uSPInner {
	display: none;
}

.myButton...

JavaScript

$(function () {
    		$('.myButton').click(function() {
	var vStr = "1.0";
	var vULSize = $("#uSPStyle li:not(li li)").size();
	var vULSubSize;
	if (vStr.indexOf('.') !== -1) {
		var vSplit = vStr.split(".");
		var vFirst = vSplit[0];
		var vSecond = vSplit[1];
		console.log(vFirst);
		console.log(vSecond);
		
		console.log(vULSize);
		if (vFirst <= vULSize) {
            alert("1");
            alert($("#uSPStyle li:not(li li):eq(0)").find("a").eq(0).text());
			$("#uSPStyle li:not(li li):eq(0)").find("a").eq(0).removeClass("current");
            $("#uSPStyle li:not(li li):eq(" + vFirst + ")").find("a").eq(0).addClass("current"); //{need help}add the 'current' class to the parent LI
            if ($("#uSPStyle li:not(li li):eq(" + vFirst + ")").find("a").closest("li").children("ul").length) {
				alert("yes" + " " + $("#uSPStyle li:not(li li):eq(" + vFirst + ")").find("a").closest("li").children("ul").length);
                vULSubSize = $("#uSPStyle li:not(li li):eq(" + vFirst + ")").find("a").closest("li").children("ul").length; //{DONE}get the size of the sub UL inside the above LI
                $("#uSPStyle li:not(li li):eq(" + vFirst + ")").find("a").closest("li").children("ul").slideToggle();
                if (vSecond <= vULSubSize) { //if the number is less than or equal to the size of the sub UL
                    alert("less than or equal to");
                    //display the content for the CHILD item
                    $("#uSPStyle > li:eq(" + vFirst + ") > ul > li:eq(" + vSecond + ") a").addClass("current");
                }
                else {
                    alert("number too high");
                    //display the content for the PARENT item
                }
			}
            else {
                alert("no");
            }
		}
	}
	else {
		//{need help}remove 'current' class from the existing parent LI
		$("#uSPStyle li:eq(" + vFirst + ")").addClass("current"); //{need help}add the 'current' class to the parent...