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<!doctype html>
<html class="reftest-wait">
<title>Image intrinsic size specified via sizes attribute reacts properly to media changes</title>
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
<link rel="match" href="sizes-dynamic-001-ref.html">
<link rel="help" href="https://html.spec.whatwg.org/#sizes-attributes">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1149357">
<script>
function frameLoaded(frame) {
frame.width = "500";
let img = frame.contentDocument.querySelector('img');
// Trigger the viewport resize, which will trigger the image load task.
img.offsetWidth;
// Wait for the image load task to run.
setTimeout(() => document.documentElement.removeAttribute("class"), 0);
}
</script>
<iframe onload="frameLoaded(this)" width="200" height="500" srcdoc='<!doctype html><img srcset="/images/green-256x256.png 100w" style="max-width: 100%" sizes="(min-width: 400px) 10px, 20px">'></iframe>
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