JSFiddle - React, Tailwind, and code Playground

HTML

<div class="one">
<div class="data">text</div>
<div class="data">text</div>
<div class="data">text</div>
</div>
<hr>
<div class="two">
<div class="data">text</div>
<div class="data">text</div>
<div class="data">text</div>
</div>

CSS

#id {
    position:relative;
    top:50px;
}

JavaScript

$(".data").click(function(){
   var $divs = $(this).siblings().andSelf();
    
    alert($divs.length);
});