gecko-dev/layout/reftests/async-scrolling/bg-fixed-child-clip-1.html
Kartikaya Gupta bc6c7c9f34 Bug 1650081 - Use scrollbar-width:none instead of overflow:hidden to hide scrollbars. r=botond
Instead of using overflow:hidden on the body to hide the scrollbar, this
patch sets scrollbar-width:none on the html element. In some cases
overflow:hidden is set on non-root scrollers (i.e. div elements); in those
cases it is replaced by overflow:scroll;scrollbar-width:none to get an
equivalent effect.

One test had a pre-existing visible scrollbar on a nested scrollframe, but
which started failing with a small fuzz difference. I left the scrollbar as-is
and added an annotation to the reftest.list file.

Note that this only updates the tests that use reftest-async-scroll as those
were the cases that were easily detectable, and causing problems with the
apz.allow_zooming=true pref.

Differential Revision: https://phabricator.services.mozilla.com/D82032
2020-07-03 19:50:11 +00:00

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HTML

<!DOCTYPE HTML>
<html reftest-async-scroll
reftest-displayport-x="0" reftest-displayport-y="0"
reftest-displayport-w="800" reftest-displayport-h="2000"
reftest-async-scroll-x="0" reftest-async-scroll-y="50"
style="scrollbar-width:none">
<body style="height:3000px; margin:0;">
<div style="margin-top: 100px; height: 100px;
background-image:url(repeatable-diagonal-gradient.png);
background-attachment:fixed;
background-repeat:no-repeat;
background-position:top left;">
</div>
<!-- test that the clip of a background-attachment:fixed background of a
child element moves correctly during async scrolling -->
</body>
</html>