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55 lines
1.7 KiB
HTML
55 lines
1.7 KiB
HTML
<!doctype html>
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<meta charset="utf-8">
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<title>CSS Overflow: scrollbar-gutter on the root, not scrolling</title>
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<link rel="author" title="Felipe Erias Morandeira" href="mailto:felipeerias@igalia.com" />
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<link rel="help" href="https://drafts.csswg.org/css-overflow-4/#scrollbar-gutter-property" />
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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="/css/support/parsing-testcommon.js"></script>
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<style>
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body,
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html {
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margin: 0;
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padding: 0;
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border: none;
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}
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:root {
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scrollbar-gutter: stable;
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}
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#content {
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background: green;
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width: 100%;
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height: 100px;
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}
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</style>
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<body>
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<div id="content"></div>
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<script type="text/javascript">
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setup({ explicit_done: true });
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test(function () {
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let root = document.documentElement;
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let body = document.body;
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let content = document.getElementById('content');
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// Note: as per the CSSOM spec, the clientWidth of the root element is
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// "viewport width excluding the size of a rendered scroll bar (if any)"
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// which does not take scrollbar-gutter into account.
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// Since no such special case exists for offsetWidth, this means that here
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// root.clientWidth is actually greater than root.offsetWidth.
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assert_less_than(root.offsetWidth, window.innerWidth, "viewport has gutter");
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assert_equals(body.offsetWidth, root.offsetWidth, "body matches root");
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assert_equals(body.clientWidth, body.offsetWidth, "body has no gutter");
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assert_equals(content.offsetWidth, body.clientWidth, "content matches body");
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}, "viewport has gutter, others do not");
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done();
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</script>
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</body>
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