74 lines
2.1 KiB
HTML
74 lines
2.1 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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width: 170px;
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height: 200px;
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overflow-y: scroll;
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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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position: absolute;
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}
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</style>
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<div id="root" style="position: absolute">
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<div id="target" style="left: 50px; top: 250px"></div>
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</div>
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<script>
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var entries = [];
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var root, target;
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runTestCycle(function() {
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root = document.getElementById("root");
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assert_true(!!root, "root element exists.");
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target = document.getElementById("target");
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assert_true(!!target, "target element 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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target.style.top = "10px";
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runTestCycle(test1, "In containing block and intersecting.");
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}, "IntersectionObserver should only report intersections if root is a containing block ancestor of target.");
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function test1() {
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runTestCycle(test2, "In containing block and not intersecting.");
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var rootBounds = contentBounds(root);
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checkLastEntry(entries, 0, [58, 158, 18, 118, 58, 158, 18, 118].concat(rootBounds));
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target.style.top = "250px";
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}
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function test2() {
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runTestCycle(test3, "Not in containing block and intersecting.");
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var rootBounds = contentBounds(root);
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checkLastEntry(entries, 1, [58, 158, 258, 358, 0, 0, 0, 0].concat(rootBounds));
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root.style.position = "static";
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target.style.top = "10px";
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}
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function test3() {
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runTestCycle(test4, "Not in containing block and not intersecting.");
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checkLastEntry(entries, 1);
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target.style.top = "250px";
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}
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function test4() {
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checkLastEntry(entries, 1);
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target.style.top = "0";
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}
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</script>
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