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Test Info:

<!DOCTYPE html>
<title>Performance Paint Timing Test: Whitespace should not count as contentful</title>
#main {
position: relative;
width: 100px;
height: 100px;
background-image: url(../resources/circles.png);
background-size: 0 0;
#text {
display: none;
/* contentful class is defined in test_fcp script. */
#main.contentful #text{
display: block;
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../resources/utils.js"></script>
<div id="main">
<div id="whitespace"> </div>
<div id="text">TEXT</div>
// Load the image into memory first to make sure it's decoded.
function load_image() {
const img = document.createElement("img");
img.src = "../resources/circles.png";
return new Promise(resolve => {
img.onload = async () => resolve();
test_fcp("Whitespace should not count as contentful.", load_image)