35 lines
1.2 KiB
HTML
35 lines
1.2 KiB
HTML
<!DOCTYPE html>
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<title>IntersectionObserver when root == target doesn't compute an intersection</title>
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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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<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1682915">
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<link rel="help" href="https://w3c.github.io/IntersectionObserver/#update-intersection-observations-algo">
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<!--
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Quoting IntersectionObserver section 3.2.8, "Run the Update Intersection Observations Steps", step 2, substep 3:
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If the intersection root is an Element, and target is not a descendant of
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the intersection root in the containing block chain, skip to step 11.
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-->
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<style>
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#container {
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overflow: scroll;
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width: 100px;
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height: 100px;
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}
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</style>
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<div id=container>
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<div></div>
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</div>
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<script>
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async_test(function(t) {
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let container = document.getElementById("container");
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let observer = new IntersectionObserver(t.step_func_done(function(entries) {
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assert_equals(entries.length, 1);
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assert_equals(entries[0].intersectionRatio, 0);
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assert_equals(entries[0].isIntersecting, false);
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}), { root: container });
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observer.observe(container);
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});
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</script>
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