JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <div class="showDiv">showDiv</div>
    <div class="showDiv">showDiv</div>
    <div class="showDiv">showDiv</div>
</div>

<div>
    <div class="myClass">myClass 1</div>
    <div class="myClass">myClass 2</div>
    <div class="myClass">myClass 3</div>
</div>

CSS

.showDiv
{
    cursor: pointer;
}

JavaScript

$(function() {
    $('.myClass').hide();
    
    $('.showDiv').click(function() {
        var index = $('.showDiv').index(this);
        
        $('.myClass:eq(' + index + ')').toggle();
    });
});