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39 lines
1.3 KiB
HTML
39 lines
1.3 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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<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
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<link rel="author" title="Mozilla" href="https://mozilla.org">
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<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1561450">
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<link rel="help" href="https://drafts.csswg.org/css-scroll-anchoring/#suppression-triggers">
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<style>
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body { margin: 0 }
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.content {
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height: 45vh;
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background: lightblue;
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}
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</style>
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<div class="content"></div>
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<div id="hidden" style="display: none; height: 200px"></div>
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<div class="content"></div>
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<div class="content"></div>
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<div class="content"></div>
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<script>
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let first = true;
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const t = async_test("Scroll adjustments don't happen if triggered from scroll event listeners");
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onscroll = t.step_func(function() {
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assert_true(first, "Should only get one event");
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first = false;
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hidden.style.display = "block";
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hidden.offsetTop;
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hidden.style.display = "none";
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requestAnimationFrame(t.step_func(function() {
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requestAnimationFrame(t.step_func(function() {
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t.done();
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}));
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}));
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});
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window.onload = t.step_func(function() {
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window.scrollTo(0, document.documentElement.scrollHeight);
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window.scrollBy(0, -200);
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});
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</script>
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