89 lines
2.7 KiB
HTML
89 lines
2.7 KiB
HTML
<!DOCTYPE html>
|
|
<link rel="help" href="https://drafts.csswg.org/css-scroll-snap-1/#valdef-scroll-snap-type-mandatory" />
|
|
<script src="/resources/testharness.js"></script>
|
|
<script src="/resources/testharnessreport.js"></script>
|
|
<script src="./support/common.js"></script>
|
|
<style>
|
|
div {
|
|
position: absolute;
|
|
margin: 0px;
|
|
}
|
|
#scroller {
|
|
height: 500px;
|
|
width: 500px;
|
|
overflow: hidden;
|
|
}
|
|
.child {
|
|
width: 300px;
|
|
height: 300px;
|
|
background-color: blue;
|
|
}
|
|
</style>
|
|
|
|
<div id="scroller">
|
|
<div class="child" style="top: 0px; left: 0px;"></div>
|
|
<div class="child" style="top: 1000px; left: 1000px;"></div>
|
|
<div style="width: 2000px; height: 2000px;"></div>
|
|
</div>
|
|
|
|
<script>
|
|
test(() => {
|
|
scroller.style.scrollSnapType = "both mandatory";
|
|
|
|
// Scroll to where the first child is in view.
|
|
scroller.scrollTo(100, 100);
|
|
assert_equals(scroller.scrollLeft, 100);
|
|
assert_equals(scroller.scrollTop, 100);
|
|
|
|
// Scroll to where the second child is in view.
|
|
scroller.scrollTo(900, 900);
|
|
assert_equals(scroller.scrollLeft, 900);
|
|
assert_equals(scroller.scrollTop, 900);
|
|
}, "No snapping occurs if there is no valid snap position");
|
|
|
|
test(() => {
|
|
scroller.style.scrollSnapType = "x mandatory";
|
|
|
|
for (const target of document.querySelectorAll(".child")) {
|
|
target.scrollSnapAlign = "start none";
|
|
}
|
|
|
|
// Scroll to where the first child is in view.
|
|
scroller.scrollTo(100, 100);
|
|
assert_equals(scroller.scrollLeft, 100);
|
|
assert_equals(scroller.scrollTop, 100);
|
|
|
|
// Scroll to where the second child is in view.
|
|
scroller.scrollTo(900, 900);
|
|
assert_equals(scroller.scrollLeft, 900);
|
|
assert_equals(scroller.scrollTop, 900);
|
|
}, "No snapping occurs if there is no valid snap position matches scroll-snap-type");
|
|
|
|
promise_test(async t => {
|
|
// Start with valid snap positions.
|
|
scroller.style.scrollSnapType = "y mandatory";
|
|
document.querySelectorAll('.child').forEach(el => {
|
|
el.style.scrollSnapAlign = 'start';
|
|
t.add_cleanup(() => {
|
|
el.style.scrollSnapAlign = '';
|
|
});
|
|
});
|
|
scroller.scrollTo(100, 100);
|
|
await waitForNextFrame();
|
|
const scrollPosition = scroller.scrollTop;
|
|
// Elements no longer snap along the y-axis.
|
|
document.querySelectorAll('.child').forEach(el => {
|
|
el.style.scrollSnapAlign = 'none start';
|
|
// Bump the position to verify that we don't stay pinned to the same element
|
|
// after layout update.
|
|
el.style.top = `${parseInt(el.style.top) + 100}px`;
|
|
});
|
|
await waitForNextFrame();
|
|
assert_equals(scroller.scrollTop, scrollPosition);
|
|
scroller.scrollTo(900, 900);
|
|
assert_equals(scroller.scrollLeft, 900);
|
|
assert_equals(scroller.scrollTop, 900);
|
|
|
|
}, "No snapping occurs when last remaining valid snap point is no longer " +
|
|
"valid.");
|
|
</script>
|