зеркало из https://github.com/mozilla/gecko-dev.git
75 строки
2.2 KiB
HTML
75 строки
2.2 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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.spacer {
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height: calc(100vh + 100px);
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}
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iframe {
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height: 100px;
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width: 150px;
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}
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</style>
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<div class="spacer"></div>
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<div style="overflow: hidden">
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<iframe id="target-iframe" src="resources/iframe-no-root-subframe.html"></iframe>
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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 iframe = document.getElementById("target-iframe");
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var target;
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var entries = [];
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iframe.onload = function() {
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runTestCycle(function() {
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assert_true(!!iframe, "iframe exists");
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target = iframe.contentDocument.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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});
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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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}, "Observer with the implicit root; target in a same-origin iframe.");
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};
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function step0() {
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document.scrollingElement.scrollTop = 200;
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runTestCycle(step1, "document.scrollingElement.scrollTop = 200");
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checkLastEntry(entries, 0, [8, 108, 208, 308, 0, 0, 0, 0, 0, vw, 0, vh, false]);
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}
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function step1() {
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iframe.contentDocument.scrollingElement.scrollTop = 250;
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runTestCycle(step2, "iframe.contentDocument.scrollingElement.scrollTop = 250");
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assert_equals(entries.length, 1, "entries.length == 1");
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}
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function step2() {
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document.scrollingElement.scrollTop = 100;
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runTestCycle(step3, "document.scrollingElement.scrollTop = 100");
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checkLastEntry(entries, 1, [8, 108, -42, 58, 8, 108, 0, 58, 0, vw, 0, vh, true]);
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}
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function step3() {
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checkLastEntry(entries, 2, [8, 108, -42, 58, 0, 0, 0, 0, 0, vw, 0, vh, false]);
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document.scrollingElement.scrollTop = 0;
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}
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</script>
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