JSFiddle - React, Tailwind, and code Playground

by Carl Angelo Nievarez

HTML

<table>
    <tr><td>2</td><td>49</td><td>98</td></tr>
    <tr><td>55</td><td>1211</td><td>2</td></tr>
    <tr><td>99</td><td>1</td><td>21</td></tr>
    <tr><td>183</td><td>12</td><td>55</td></tr>
</table>

JavaScript

$(document).ready(function(){
var result = [];
  $('table tr').each(function(){
  	$('td', this).each(function(index, val){
    	if(!result[index]) result[index] = 0;
      result[index] += parseInt($(val).text());
    });
  });
  
  $('table').append('<tr></tr>');
  $(result).each(function(){
  	$('table tr').last().append('<td>'+this+'</td>')
  });
});