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54 lines
1.6 KiB
HTML
54 lines
1.6 KiB
HTML
<!DOCTYPE html>
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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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<style>
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pre, #log {
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position: absolute;
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top: 0;
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left: 200px;
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}
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#target {
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background-color: green;
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width: 100px;
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height: 100px;
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}
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</style>
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<div id="target"></div>
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<script>
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var vw = document.documentElement.clientWidth;
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var vh = document.documentElement.clientHeight;
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var entries = [];
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runTestCycle(function() {
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var target = document.getElementById("target");
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var root = document.getElementById("root");
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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, "Intersecting notification after first rAF.");
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}, "IntersectionObserver should send a not-intersecting notification for a target that gets display:none.");
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function step0() {
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runTestCycle(step1, "Not-intersecting notification after setting display:none on target.");
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checkLastEntry(entries, 0, [8, 108, 8, 108, 8, 108, 8, 108, 0, vw, 0, vh, true]);
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target.style.display = "none";
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}
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function step1() {
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runTestCycle(step2, "Intersecting notification after removing display:none on target.");
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checkLastEntry(entries, 1, [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, false]);
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target.style.display = "";
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}
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function step2() {
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checkLastEntry(entries, 2, [8, 108, 8, 108, 8, 108, 8, 108, 0, vw, 0, vh, true]);
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}
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</script>
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