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a2307e62ae
These changes were reviewed, landed, and accidentally backed out in bug 1528107. Differential Revision: https://phabricator.services.mozilla.com/D19871 --HG-- extra : rebase_source : e9b1a4ff9e8881a756e795c519e6a86b4c6a47dd extra : source : 9251d7ca6f093902261089f4c571db72b63df38d
26 lines
728 B
HTML
26 lines
728 B
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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<style>
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body { height: 4000px; margin: 0; }
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#fixed, #content { width: 200px; height: 100px; }
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#fixed { position: fixed; left: 100px; top: 50px; }
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#before { height: 50px; }
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#content { margin-top: 100px; }
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</style>
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<div id="fixed">fixed</div>
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<div id="before"></div>
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<div id="content">content</div>
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<script>
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// Tests that the anchor selection algorithm skips fixed-positioned elements.
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test(() => {
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document.scrollingElement.scrollTop = 100;
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document.querySelector("#before").style.height = "100px";
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assert_equals(document.scrollingElement.scrollTop, 150);
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}, "Fixed-position header.");
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</script>
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