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<!DOCTYPE html>
<html>
<head>
<title> CSS Scroll Snap 2 Test: scrollsnapchange events</title>
<link rel="help" href="https://drafts.csswg.org/css-scroll-snap-2/#snap-events">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="/css/css-scroll-snap/snap-events/resources/common.js"></script>
<script src="/dom/events/scrolling/scroll_support.js"></script>
<script src="/css/css-scroll-snap/support/common.js"></script>
</head>
<body>
<style>
.scroller {
overflow: scroll;
width: 200px;
height: 200px;
border: solid 1px black;
scroll-snap-type: y mandatory;
position: absolute;
resize: both;
}
.snaparea {
scroll-snap-align: start;
height: 50px;
width: 50px;
color: white;
margin-top: 100px;
background-color: purple;
}
.space {
height: 300vh;
width: 300vw;
position: absolute;
}
</style>
<div class="scroller" id="scroller">
<div class="space"></div>
<div class="snaparea"> Area2</div>
<div class="snaparea"> Area1</div>
</div>
<script>
promise_test(async (t) => {
await waitForCompositorCommit();
scroller.focus();
const scrollsnapchange_promise = waitForSnapEvent(scroller, "scrollsnapchange");
await test_driver.send_keys(scroller, KEY_CODE_MAP["ArrowRight"]);
const snap_event = await scrollsnapchange_promise;
assert_equals(snap_event, null, "no scrollsnapchange event fired as " +
"scroller doesn't snap in the x axis");
}, "keyboard scroll on non-snapping axis doesn't trigger scrollsnapchange");
promise_test(async (t) => {
await waitForScrollReset(t, scroller);
await waitForCompositorCommit();
scroller.focus();
const scrollsnapchange_promise = waitForSnapEvent(scroller, "scrollsnapchange");
const wheel_scroll_amount = 25;
new test_driver.Actions().scroll(0, 0,
wheel_scroll_amount,
0,
{ origin: scroller }).send();
const snap_event = await scrollsnapchange_promise;
assert_equals(snap_event, null, "no scrollsnapchange event fired as " +
"scroller doesn't snap in the x axis");
}, "wheel scroll on non-snapping axis doesn't trigger scrollsnapchange");
</script>
</body>
</html>
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