JSFiddle - React, Tailwind, and code Playground

by glebcha

HTML

<table>
    <tr><td>aaaaaaaa</td></tr>
    <tr><td>aaaaaaaa</td></tr>
    <tr><td>bbbbbbbb</td></tr>
    <tr><td>bbbbbbbb</td></tr>
    <tr><td>aaaaaaaa</td></tr>
    <tr><td>aaaaaaaa</td></tr>
    <tr><td>bbbbbbbb</td></tr>
    <tr><td>bbbbbbbb</td></tr>
    <tr><td>aaaaaaaa</td></tr>
    <tr><td>aaaaaaaa</td></tr>
    <tr><td>bbbbbbbb</td></tr>
    <tr><td>bbbbbbbb</td></tr>
</table>

CSS

table tr:nth-child(4n-1), table tr:nth-child(4n)  {
    background: #ccc;
}