JSFiddle - React, Tailwind, and code Playground

HTML

<table>
    <tr><td><button class="check">Is Current?</button></td><td><button class="set">Set Current</button></td></tr>
    <tr><td><button class="check">Is Current?</button></td><td><button class="set">Set Current</button></td></tr>
        <tr><td><button class="check">Is Current?</button></td><td><button class="set">Set Current</button></td></tr>
</table>

JavaScript

var $currentRow = null;

$(function(){
    $('.set').click(function(){
        $currentRow = $(this).closest('tr');
    });
    
    $('.check').click(function(){
        console.dir($(this).closest('tr'));
        if ($currentRow == $(this).closest('tr')) {
            alert('Yes');
        }
        else {
            alert('No');
        }
    });
});