| <!doctype html> |
| <meta charset=utf-8> |
| <title>modulepreload with an invalid integrity does not poison a later import</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <body> |
| <script> |
| // A modulepreload whose integrity check fails is a fetch error, which per the |
| // HTML spec is not cached in the module map. A later <script type=module> for |
| // the same URL that has no integrity requirement must therefore be able to |
| // fetch it again and load successfully. |
| // https://html.spec.whatwg.org/#fetch-a-single-module-script |
| // |
| // The <script> is only inserted after the modulepreload has finished, so the |
| // two never join a single in-flight fetch. |
| promise_test(async () => { |
| const link = document.createElement('link'); |
| link.rel = 'modulepreload'; |
| link.href = 'resources/module1.js'; |
| link.integrity = 'sha384-invalid'; |
| await new Promise((resolve, reject) => { |
| link.onload = () => reject(new Error('modulepreload should have failed its integrity check')); |
| link.onerror = resolve; |
| document.head.appendChild(link); |
| }); |
| |
| const script = document.createElement('script'); |
| script.type = 'module'; |
| script.src = 'resources/module1.js'; |
| await new Promise((resolve, reject) => { |
| script.onload = resolve; |
| script.onerror = () => reject(new Error('script should have loaded')); |
| document.body.appendChild(script); |
| }); |
| }, "A module script should load even if an earlier modulepreload for the same URL failed its integrity check"); |
| </script> |
