85 lines
2.5 KiB
HTML
85 lines
2.5 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: 8px solid black;
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}
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#target {
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margin: 10px;
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width: 100px;
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height: 100px;
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padding: 10px;
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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 the target's border bounding box is used to calculate intersection.");
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function step0() {
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var targetBounds = clientBounds(target);
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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, targetBounds.concat(0, 0, 0, 0, 8, 184, 8, 224, false));
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}
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function step1() {
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var targetBounds = clientBounds(target);
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target.style.transform = "translateY(300px)";
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runTestCycle(step2, "target.style.transform = 'translateY(300px)'");
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checkLastEntry(entries, 1, targetBounds.concat(26, 146, 221, 224, 8, 184, 8, 224, true));
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}
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function step2() {
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var targetBounds = clientBounds(target);
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target.style.transform = "";
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target.style.zoom = "2";
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runTestCycle(step3, "target.style.zoom = 2");
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checkLastEntry(entries, 2, targetBounds.concat(0, 0, 0, 0, 8, 184, 8, 224, false));
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}
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function step3() {
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var targetBounds = clientBounds(target);
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var intersectionWidth = (
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176 // root width including border
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-8 // root left border
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-20 // target left margin * target zoom
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)
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var intersectionHeight = (216 - 8 - 20);
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var intersectionRect = [targetBounds[0], targetBounds[0] + intersectionWidth,
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targetBounds[2], targetBounds[2] + intersectionHeight];
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checkLastEntry(entries, 3, targetBounds.concat(intersectionRect).concat(8, 184, 8, 224, true));
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}
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</script>
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