41 lines
1.3 KiB
HTML
41 lines
1.3 KiB
HTML
<!DOCTYPE html><!-- webkit-test-runner [ IntersectionObserverEnabled=true ] -->
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<head>
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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/gc.js"></script>
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<body>
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<div id="target" style="width: 100px; height: 100px; background-color: green"></div>
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<script>
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function observerShouldBeRemoved()
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{
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return new Promise(function(resolve) {
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function testIfRemoved() {
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gc();
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if (internals && internals.numberOfIntersectionObservers(document) == 0)
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resolve();
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else
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requestAnimationFrame(testIfRemoved);
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}
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testIfRemoved();
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});
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}
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async_test(function(t) {
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let observer = new IntersectionObserver(function(entries) {
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if (entries[0].isIntersecting) {
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entries[0].target.remove();
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observerShouldBeRemoved().then(function() {
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t.done();
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});
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}
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});
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observer.observe(document.getElementById("target"));
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assert_equals(internals.numberOfIntersectionObservers(document), 1);
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}, "IntersectionObserver doesn't keep unreachable target alive");
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</script>
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</body>
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</html>
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