JSFiddle - React, Tailwind, and code Playground

by interdream

HTML

<table id="test">
    <tr>
        <td></td>
        <td></td>
        <td></td>
    </tr>
    <tr>
        <td></td>
        <td colspan="2"></td>
    </tr>
    <tr>
        <td colspan="3"></td>
    </tr>
</table>

JavaScript

var max = 0;
$("tr").each(function() {
   var count = $(this).find("td").length; 
    if(count > max) max = count;
});
alert(max);