JSFiddle - React, Tailwind, and code Playground

HTML

<table id="myTable" border="1">
    <thead>
        <tr><th>Col1</th><th>Col2</th><th>Col3</th></tr>
    </thead>
    <tbody>
        <tr><td>Val 1</td><td>Val 1</td><td>Val 2</td></tr>
        <tr><td>Val 3</td><td>Val 3</td><td>Val 3</td></tr>
        <tr><td>Val 1</td><td>Val 2</td><td>Val 2</td></tr>
        <tr><td>Val 123</td><td>Val abc</td><td>Val 122</td></tr>
        <tr><td>:]</td><td>:]</td><td>:]</td></tr>
    </tbody>
</table>

CSS

html {font-size: 22px;}
table tr th, table tr td {padding: 5px;}
.different{
    background: yellow;
}

JavaScript

$(document).ready(function() {
    $('#myTable tbody tr').each(function() {

        //compare each cell to adjacent cells
        $(this).find('td').each(function() {
            var $val = $(this).text();

            //checks for different values.  as soon as a difference
            //is encountered we move to next row
            $(this).parent().find('td').each(function() {
                if ($(this).text() != $val) {
                    $(this).parent().addClass('different');
                    return false;
                }
            });
        });
    });

});