| Quellcodebibliothek Statistik Leitseite products/Sources/formale Sprachen/C/Firefox/testing/web-platform/tests/preload/ (Browser von der Mozilla Stiftung Version 136.0.1©) Datei vom 10.2.2025 mit Größe 1 kB |
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Quelle preconnect.html Sprache: HTML |
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<!DOCTYPE html> <html> <title>Makes sure that preloaded resources reduce connection time to zero</title> <meta name="timeout" content="long"> <meta name="pac" content="/common/proxy-all.sub.pac"> <script src="/common/utils.js"></script> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <body> <script> const FAKE_PORT = 30303; promise_test(async t => { const fake_remote_origin = `http://${token()}.wpt:${FAKE_PORT}`; const link = document.createElement('link'); link.rel = "preconnect"; link.href = fake_remote_origin; document.head.appendChild(link); await new Promise(r => t.step_timeout(r, 1000)); const url = `${fake_remote_origin}/images/smiley.png`; const entryPromise = new Promise(resolve => { new PerformanceObserver(list => { const entries = list.getEntriesByName(url); if (entries.length) resolve(entries[0]); }).observe({type: "resource"}); }); const img = document.createElement('img'); img.src = url; document.body.appendChild(img); const entry = await entryPromise; assert_equals(entry.domainLookupStart, entry.domainLookupEnd); assert_equals(entry.domainLookupStart, entry.connectStart); assert_equals(entry.domainLookupStart, entry.connectEnd); }, "Test that preconnect reduces connection time to zero"); </script> </body> </html>
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2026-04-02