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<!doctype html>
<meta charset="utf-8">
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
<link rel="author" title="Mozilla" href="https://mozilla.org">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1832528">
<link rel="help" href="https://drafts.csswg.org/css-backgrounds/">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
:root {
--icon: url("/images/green.png?variable-cors-no-reload");
}
.item::before,
.item::after {
display: block;
content: "";
height: 1.25rem;
width: 1.25rem;
transform: rotate(180deg);
background: var(--icon) 50%/2rem 2rem;
}
.item::after {
background: blue;
mask: var(--icon);
}
.item.toggled::after,
.item.toggled::before {
color: blue;
}
</style>
<div class="item"></div>
<script>
let t = async_test("CORS image from variable doesn't cause re-downloads");
function getEntries() {
let url = new URL("/images/green.png?variable-cors-no-reload", location.href).href;
return performance.getEntriesByName(url);
}
onload = t.step_func(function() {
let entries = getEntries();
assert_equals(entries.length, 2, "should be loaded (twice, once with anon cors mode once without)");
document.querySelector(".item").classList.toggle("toggled");
// Assume that at least some of the time the load would complete under a second.
t.step_timeout(t.step_func_done(function() {
let entries_after = getEntries();
assert_equals(entries_after.length, entries.length, "Shouldn't have caused re-downloads");
}), 1000);
});
</script>
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