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<!DOCTYPE html>
<html>
<title>Test the supported value for <link rel=preload as="..."></title>
<meta name="timeout" content="long">
<meta name="variant" content="?as=image&expected=1">
<meta name="variant" content="?as=fetch&expected=1">
<meta name="variant" content="?as=font&expected=1">
<meta name="variant" content="?as=script&expected=1">
<meta name="variant" content="?as=style&expected=1">
<meta name="variant" content="?as=track&expected=1">
<meta name="variant" content="?as=garbagefoobar&expected=0">
<meta name="variant" content="?as=video&expected=0">
<meta name="variant" content="?as=audio&expected=0">
<meta name="variant" content="?as=object&expected=0">
<meta name="variant" content="?as=iframe&expected=0">
<meta name="variant" content="?as=worklet&expected=0">
<meta name="variant" content="?as=json&expected=0">
<script src="/common/utils.js"></script>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<script>
const params = new URLSearchParams(location.search);
const as = params.get("as");
const expected = Number(params.get("expected"));
promise_test(async t => {
const link = document.createElement("link");
link.href = new URL("/common/echo.py?content=nothing", location.href).href;
link.rel = "preload";
link.as = as;
document.head.append(link);
await new Promise(resolve => {
t.step_timeout(resolve, 1000);
link.addEventListener("load", resolve);
link.addEventListener("error", resolve);
});
const resources = performance.getEntriesByName(link.href);
assert_equals(resources.length, expected);
});
</script>
</body>
</html>
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