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48 lines
1.5 KiB
HTML
48 lines
1.5 KiB
HTML
<!DOCTYPE HTML>
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<meta charset=utf-8>
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<title>MutationObservers: disconnect</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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<h1>MutationObservers: disconnect</h1>
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<div id="log"></div>
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<section style="display: none">
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<p id='n00'></p>
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</section>
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<script>
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var n00 = document.getElementById('n00');
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var parentTest = async_test("subtree mutations");
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function masterMO(sequence, obs) {
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parentTest.step(function() {
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assert_equals(sequence.length, 4, "mutation records must match");
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});
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parentTest.done();
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}
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parentTest.step(function() {
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(new MutationObserver(masterMO)).observe(n00.parentNode, {"subtree": true, "attributes": true});
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});
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var disconnectTest = async_test("disconnect discarded some mutations");
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function observerCallback(sequence, obs) {
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disconnectTest.step(function() {
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assert_equals(sequence.length, 1);
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assert_equals(sequence[0].type, "attributes");
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assert_equals(sequence[0].attributeName, "id");
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assert_equals(sequence[0].oldValue, "latest");
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disconnectTest.done();
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});
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}
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var observer;
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disconnectTest.step(function() {
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observer = new MutationObserver(observerCallback);
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observer.observe(n00, {"attributes": true});
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n00.id = "foo";
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n00.id = "bar";
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observer.disconnect();
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observer.observe(n00, {"attributes": true, "attributeOldValue": true});
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n00.id = "latest";
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observer.disconnect();
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observer.observe(n00, {"attributes": true, "attributeOldValue": true});
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n00.id = "n0000";
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});
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</script>
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