58 lines
1.6 KiB
HTML
58 lines
1.6 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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<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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#root {
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overflow: visible;
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height: 200px;
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width: 160px;
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border: 7px solid black;
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}
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#target {
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width: 100px;
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height: 100px;
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background-color: green;
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}
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</style>
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<div id="root">
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<div id="target" style="transform: translateY(300px)"></div>
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</div>
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<script>
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var entries = [];
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var target;
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runTestCycle(function() {
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target = document.getElementById("target");
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assert_true(!!target, "target exists");
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var root = document.getElementById("root");
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assert_true(!!root, "root exists");
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var observer = new IntersectionObserver(function(changes) {
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entries = entries.concat(changes)
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}, {root: root});
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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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}, "Test that border bounding box is used to calculate intersection with a non-scrolling root.");
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function step0() {
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target.style.transform = "translateY(195px)";
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runTestCycle(step1, "target.style.transform = 'translateY(195px)'");
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checkLastEntry(entries, 0, [15, 115, 315, 415, 0, 0, 0, 0, 8, 182, 8, 222, false]);
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}
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function step1() {
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target.style.transform = "";
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checkLastEntry(entries, 1, [15, 115, 210, 310, 15, 115, 210, 222, 8, 182, 8, 222, true]);
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}
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</script>
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