mirror of
https://github.com/mozilla/gecko-dev.git
synced 2025-11-10 05:08:36 +02:00
41e7011cb8
Automatic update from web-platform-tests Update wpt scroll-to-visible-areas tests The original tests were based on an inaccurate understanding of "visibility" for a snap area, where a snap area was considered to be visible if it is in the viewport at the scroll location before the snap. The definition of visibility per the specification is that a snap area is visible if it would be in the viewport at its snap point. See: https://github.com/w3c/csswg-drafts/issues/2526#issuecomment-380371186 Also added tests for the consideration of scroll-margin when calculating visibility as well. Bug: 954851 Change-Id: Ic2ffef8d02fc5ea2439054b6ea5185bb66622d1d Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1795308 Commit-Queue: Kaan Alsan <alsan@google.com> Reviewed-by: Yi Gu <yigu@chromium.org> Reviewed-by: Majid Valipour <majidvp@chromium.org> Cr-Commit-Position: refs/heads/master@{#696435} -- wpt-commits: 224ecb27547a9b49b28b7ae06abc8bc09f4b91fc wpt-pr: 19007
69 lines
1.5 KiB
HTML
69 lines
1.5 KiB
HTML
<!DOCTYPE html>
|
|
<title>
|
|
Snap to an area where the element's scroll-margin is visible but not the
|
|
element itself (using x-axis snap type)
|
|
</title>
|
|
<link rel="help" href="https://drafts.csswg.org/css-scroll-snap-1/#snap-scope"/>
|
|
<script src="/resources/testharness.js"></script>
|
|
<script src="/resources/testharnessreport.js"></script>
|
|
<style>
|
|
div {
|
|
position: absolute;
|
|
margin: 0px;
|
|
}
|
|
|
|
#scroller {
|
|
height: 600px;
|
|
width: 600px;
|
|
overflow: scroll;
|
|
scroll-snap-type: x mandatory;
|
|
}
|
|
|
|
#space {
|
|
width: 2000px;
|
|
height: 2000px;
|
|
}
|
|
|
|
.snap {
|
|
width: 200px;
|
|
height: 200px;
|
|
background-color: blue;
|
|
scroll-snap-align: start;
|
|
}
|
|
|
|
#left-visible {
|
|
left: 0px;
|
|
top: 0px;
|
|
}
|
|
|
|
#right-visible {
|
|
left: 800px;
|
|
top: 0px;
|
|
}
|
|
|
|
#middle-margin-visible {
|
|
left: 700px;
|
|
top: 800px;
|
|
/* 300px makes snap area visible with margin but non-visible without it */
|
|
scroll-margin-top: 300px;
|
|
}
|
|
|
|
</style>
|
|
<div id="scroller">
|
|
<div id="space"></div>
|
|
<div id="left-visible" class="snap"></div>
|
|
<div id="middle-margin-visible" class="snap"></div>
|
|
<div id="right-visible" class="snap"></div>
|
|
</div>
|
|
<script>
|
|
test(() => {
|
|
const scroller = document.getElementById("scroller");
|
|
scroller.scrollTo(0, 0);
|
|
assert_equals(scroller.scrollLeft, 0);
|
|
assert_equals(scroller.scrollTop, 0);
|
|
scroller.scrollTo(500, 0);
|
|
assert_equals(scroller.scrollLeft, 700);
|
|
assert_equals(scroller.scrollTop, 0);
|
|
}, 'Scroll margin should be considered when calculating snap area visibilty \
|
|
while snapping on the x-axis');
|
|
</script>
|