JSFiddle - React, Tailwind, and code Playground
HTML
<script src="http://momentjs.com/downloads/moment.js"></script>
<table>
<tr>
<td class="celltocheck">08:00</td>
</tr>
<tr>
<td class="celltocheck">11:01</td>
</tr>
</table>
CSS
.red {
background-color: red;
}
JavaScript
var myTimer = setInterval(function () {
$('.celltocheck').each(function () {
if (moment().format('HH:mm') >= $(this).text().trim()) $(this).parent().addClass('red');
});
}, 1000);