JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://code.jquery.com/jquery-2.1.1.min.js"></script>
	<table class="masteries" border="1">
		<tr class="p0">
			<td><p><span>0</span>/1</p></td>
			<td><p><span>0</span>/4</p></td>
			<td><p><span>0</span>/4</p></td>
			<td><p><span>0</span>/1</p></td>
			
			<td><p><span>0</span>/2</p></td>
			<td><p><span>0</span>/2</p></td>
			<td><p><span>0</span>/2</p></td>
			<td><p><span>0</span>/2</p></td>
			
			<td><p><span>0</span>/1</p></td>
			<td><p><span>0</span>/3</p></td>
			<td><p><span>0</span>/3</p></td>
			<td><p><span>0</span>/1</p></td>
		</tr>
    </table>
<span class="cleanup">cleanup</span>

JavaScript

$('document').ready() {
    $('span.cleanup').on('click', function() {
		$('table tr td p span').css("background-image", "url('https://www.google.co.uk/images/srpr/logo11w.png')");
    });
});