46 lines
1.4 KiB
HTML
46 lines
1.4 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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iframe {
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width: 180px;
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height: 100px;
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}
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</style>
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<iframe id="iframe" srcdoc="<div id='target' style='margin:0.5px;width:1000px;height:1000px;'></div>"></iframe>
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<script>
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var target;
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var entries = [];
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var observer;
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var iframe = document.getElementById("iframe");
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iframe.onload = function() {
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runTestCycle(function() {
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target = iframe.contentDocument.getElementById("target");
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assert_true(!!target, "Target element exists.");
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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(test0, "First rAF should generate notification.");
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}, "IntersectionObserverEntry.boundingClientRect should match target.boundingClientRect()");
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};
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function test0() {
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assert_equals(entries.length, 1, "One notification.");
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var bcr = target.getBoundingClientRect();
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checkLastEntry(entries, 0, [bcr.left, bcr.right, bcr.top, bcr.bottom]);
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}
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</script>
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