avoid-delaying-onload-link-modulepreload-exec.html

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This WPT test may be referenced by the following Test IDs:
- /preload/avoid-delaying-onload-link-modulepreload-exec.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/preload/resources/preload_helper.js"></script>

<link rel=modulepreload href="resources/slow-exec.js">

<script>

    setup(() => {

        const link = window.document.createElement("link");

        assert_implements(

            'relList' in link,

            'HTMLLinkElement.relList is not supported');

        assert_implements(

            link.relList.supports("modulepreload"),

            'modulepreload is not supported');

});

    promise_test(async t => {

        await new Promise(r => window.addEventListener("load", r));

        assert_false(!!window.didLoadModule);

    }, "Executing modulepreload should not block the window's load event");

</script>