Yoshi Cheng-Hao Huang
219073d4f5
Make sure the <script> is inserted after <link rel="modulepreload"> is done, so the result would be consistent. Otherwise the <script> might also be preloaded by the speculative parser and will join a single in-flight fetch with the <link>. Differential Revision: https://phabricator.services.mozilla.com/D313496
37 lines
1.5 KiB
HTML
37 lines
1.5 KiB
HTML
<!doctype html>
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<meta charset=utf-8>
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<title>modulepreload with an invalid integrity does not poison a later import</title>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<body>
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<script>
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// A modulepreload whose integrity check fails is a fetch error, which per the
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// HTML spec is not cached in the module map. A later <script type=module> for
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// the same URL that has no integrity requirement must therefore be able to
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// fetch it again and load successfully.
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// https://html.spec.whatwg.org/#fetch-a-single-module-script
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//
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// The <script> is only inserted after the modulepreload has finished, so the
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// two never join a single in-flight fetch.
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promise_test(async () => {
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const link = document.createElement('link');
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link.rel = 'modulepreload';
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link.href = 'resources/module1.js';
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link.integrity = 'sha384-invalid';
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await new Promise((resolve, reject) => {
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link.onload = () => reject(new Error('modulepreload should have failed its integrity check'));
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link.onerror = resolve;
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document.head.appendChild(link);
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});
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const script = document.createElement('script');
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script.type = 'module';
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script.src = 'resources/module1.js';
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await new Promise((resolve, reject) => {
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script.onload = resolve;
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script.onerror = () => reject(new Error('script should have loaded'));
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document.body.appendChild(script);
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});
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}, "A module script should load even if an earlier modulepreload for the same URL failed its integrity check");
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</script>
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