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<!DOCTYPE html>
<title>Makes sure that preload requests respect CSP directives that are added after the preload</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/preload/resources/preload_helper.js"></script>
<link id="preload" rel=preload href="resources/square.png" as=image>
<body>
<script>
setup({single_test: true});
const preload = document.querySelector("#preload");
preload.addEventListener("load", async () => {
const meta = document.createElement("meta");
meta.httpEquiv = "Content-Security-Policy";
meta.content = "img-src 'none'";
document.head.appendChild(meta);
const img = document.createElement("img");
img.src = preload.href;
document.body.appendChild(img);
const load = new Promise(resolve => img.addEventListener("load", () => resolve('load')));
const error = new Promise(resolve => img.addEventListener("error", () => resolve('error')));
const result = await Promise.any([load, error]);
assert_equals(result, "error");
done();
});
</script>
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