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<!DOCTYPE html>
<head>
<title>Deferred images with loading='lazy' use the latest crossorigin attribute</title>
<link rel="author" title="Raj T" href="mailto:rajendrant@chromium.org">
<link rel="author" title="Rob Buis" href="mailto:rbuis@igalia.com">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../resources/common.js"></script>
</head>
<script>
const img = new ElementLoadPromise("cross-origin");
async_test(function(t) {
window.addEventListener("load", t.step_func(() => {
// At this point the image's #updating-the-image-data algorithm has been
// invoked, and the image request has been deferred. The deferred
// cross-origin image request was created with the `no-cors` request mode,
// which would succeed to load the cross-origin image.
// While the request is deferred, we'll set the `crossorigin` attribute to a
// value that would cause the image request to fail. Since `crossorigin`
// mutations trigger another #updating-the-image-data invocation (replacing
// the first one), when we scroll the image into view, the image should be
// fetched with the latest `crossorigin` attribute value, and fail to load.
img.element().crossOrigin = 'anonymous';
img.element().scrollIntoView();
}));
img.promise
.then(t.unreached_func("The image should not load."))
.catch(t.step_func(() => { img.element().onload = t.step_func_done(); img.element().src = 'resources/image.png'; }));
}, "Test that when deferred image is loaded, it uses the latest crossorigin attribute.");
</script>
<body>
<div style="height:1000vh;"></div>
<img id="cross-origin" loading="lazy"
src='http://{{hosts[alt][]}}:{{ports[http][0]}}/html/semantics/embedded-content/the-img-element/resources/image.png'
onload="img.resolve();" onerror="img.reject();">
</body>
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