37 lines
1.3 KiB
HTML
37 lines
1.3 KiB
HTML
<!doctype html>
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<meta name="viewport" content="width=device-width,initial-scale=1">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="./resources/intersection-observer-test-utils.js"></script>
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<div id="target" style="width: 100px; height: 100px; position: fixed; top: 0; left: 0"></div>
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<div id="log" style="height: 2000px"></div>
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<script>
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var entries = [];
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runTestCycle(function() {
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var observer = new IntersectionObserver(function(changes) {
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entries = entries.concat(changes)
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});
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observer.observe(target);
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entries = entries.concat(observer.takeRecords());
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assert_equals(entries.length, 0, 'No initial notifications.');
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runTestCycle(step0, 'First rAF.');
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}, 'Fixed-position intersection observer on scroll');
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function step0() {
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window.scrollTo(0, 1000);
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runTestCycle(step1, 'scrollTo(0, 1000)');
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checkLastEntry(entries, 0,
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[0, 100, 0, 100, 0, 100, 0, 100, 0,
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document.documentElement.clientWidth, 0, document.documentElement.clientHeight,
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true]);
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}
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function step1() {
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window.scrollTo(0, 0);
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checkLastEntry(entries, 0,
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[0, 100, 0, 100, 0, 100, 0, 100, 0,
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document.documentElement.clientWidth, 0, document.documentElement.clientHeight,
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true]);
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}
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</script>
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