зеркало из https://github.com/mozilla/gecko-dev.git
52 строки
1.7 KiB
HTML
52 строки
1.7 KiB
HTML
<!DOCTYPE HTML>
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<meta charset=utf-8>
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<meta name="timeout" content="long">
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<title>One resource when reusing data</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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async_test(t => {
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var img_entries = 0;
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var observed = 0;
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var img_url = "resources/blue.png";
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var observer = new PerformanceObserver(
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function (entryList, obs) {
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var entries = entryList.getEntriesByType("resource");
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for (var i = 0; i < entries.length; ++i) {
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// Ignore any entries for the test harness files if present.
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if (/testharness(report)?\.js/.test(entries[i].name)) {
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continue;
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}
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++observed;
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if (entries[i].name.indexOf(img_url) != -1)
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++img_entries;
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}
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});
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observer.observe({entryTypes: ["resource"]});
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window.onload = function() {
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// A timeout is needed as PerformanceObserver is not guaranteed to run before onload triggered.
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t.step_timeout(function() {
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assert_equals(observed, 1);
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assert_equals(img_entries, 1);
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t.done();
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}, 0);
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};
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// Images are added dynamically to make sure the observer is registered before their download finishes.
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var img1 = document.createElement("img");
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img1.src = img_url;
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document.body.appendChild(img1);
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var img2 = document.createElement("img");
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img2.src = img_url;
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document.body.appendChild(img2);
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}, "A single resource used in two elements produces a single entry.");
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</script>
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<h1>One resource when reusing data</h1>
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<p>
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If the user agent is to reuse the data from another existing or completed fetch initiated from the current document, abort the remaining steps.
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</p>
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<div id="log"></div>
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</body>
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