JSFiddle - React, Tailwind, and code Playground

HTML

<table>
  <tr>
  <td>
    <div>5</div>
     <div>90</div>
     <div>35</div>
     <div>12</div>
     <div>18</div>
   </td>
  <td>
     <div>35</div>
     <div>11</div>
     <div>67</div>
     <div>23</div>
     <div>8676</div>
   </td>
  </tr>
<table>

CSS

table td{border:1px solid #000;padding:10px;width:50%;}
table{border-collapse:collapse;width:100%; }
.light{background:red;}

JavaScript

$(document).on("click","div",function(){
	$(".light").removeClass("light");
	var i = $(this).index();
  var q = $(this).parent().prev().length>0?$(this).parent().prev():$(this).parent().next();
  $(this).addClass("light");
  q.children().eq(i).addClass("light");
});