90 lines
2.6 KiB
HTML
90 lines
2.6 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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.spacer {
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height: calc(100vh + 100px);
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}
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#root {
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display: inline-block;
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overflow-y: scroll;
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height: 200px;
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border: 3px 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 class="spacer"></div>
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<div id="root">
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<div style="height: 300px;"></div>
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<div id="target"></div>
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</div>
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<div class="spacer"></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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var root, 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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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, rootMargin: "10px 20% 40% 30px" });
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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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}, "Root margin with explicit root.");
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function step0() {
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document.scrollingElement.scrollTop = vh;
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runTestCycle(step1, "document.scrollingElement.scrollTop = window.innerHeight.");
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checkLastEntry(entries, 0, [ 11, 111, vh + 411, vh + 511, 0, 0, 0, 0, -19, 131, vh + 101, vh + 391, false]);
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}
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function step1() {
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root.scrollTop = 50;
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runTestCycle(step2, "root.scrollTop = 50, putting target into root margin");
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assert_equals(entries.length, 1, "No notifications after scrolling frame.");
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}
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function step2() {
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document.scrollingElement.scrollTop = 0;
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runTestCycle(step3, "document.scrollingElement.scrollTop = 0.");
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checkLastEntry(entries, 1, [11, 111, 361, 461, 11, 111, 361, 391, -19, 131, 101, 391, true]);
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}
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function step3() {
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root.scrollTop = 0;
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runTestCycle(step4, "root.scrollTop = 0");
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checkLastEntry(entries, 1);
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}
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function step4() {
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root.scrollTop = 50;
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runTestCycle(step5, "root.scrollTop = 50 with root scrolled out of view.");
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checkLastEntry(entries, 2, [ 11, 111, vh + 411, vh + 511, 0, 0, 0, 0, -19, 131, vh + 101, vh + 391, false]);
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}
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// This tests that notifications are generated even when the root element is off screen.
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function step5() {
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checkLastEntry(entries, 3, [11, 111, vh + 361, vh + 461, 11, 111, vh + 361, vh + 391, -19, 131, vh + 101, vh + 391, true]);
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}
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</script>
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