JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://cloud.github.com/downloads/SteveSanderson/knockout/knockout-2.1.0.js"></script>
<table>
        <tbody data-bind="foreach: rows">
            <tr data-bind="css: {odd: $index()%2} ">
                <td>Test Data</td>
            </tr>
        </tbody>
        </table>

CSS

.odd {
                background-color:#CCC;
            }

JavaScript

var VM = {
                rows: [{},{},{},{},{}]
            };

            ko.applyBindings(VM);