fune/layout/reftests/async-scrolling/position-fixed-iframe-2.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="80"
style="scrollbar-width:none">
<body style="height:3000px; margin:0;">
<!-- Test that position:fixed content stays fixed when we async-scroll -->
<iframe style="border:0; width:400px; height:400px; margin-top:80px;" src="data:text/html,
<!DOCTYPE HTML>
<html 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'>
<div style='position:fixed; background:blue; top:0; left:0; width:200px; height:100px'></div>
<div style='background:red; margin-top:100px; width:100px; height:50px'></div>
</body>
</html>
"></iframe>
</body>
</html>