blob: 7bdfa83f24db2df4f757091089788895ace91b58 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
<!DOCTYPE HTML>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, minimum-scale=1.0">
<title>Tests scroll anchoring interaction with smooth visual scrolling.</title>
<script src="apz_test_utils.js"></script>
<script src="apz_test_native_event_utils.js"></script>
<script src="/tests/SimpleTest/paint_listener.js"></script>
<style>
body { margin: 0 }
#target > div {
height: 500px;
}
</style>
<div id="target"></div>
<div class="spacer" style="height: 200vh"></div>
<script>
const utils = SpecialPowers.DOMWindowUtils;
const targetElement = document.getElementById("target");
async function test() {
const destY = window.scrollMaxY;
ok(destY > 0, "Should have some scroll range");
// Scroll to the bottom of the page.
window.scrollTo(0, destY);
is(window.scrollY, window.scrollMaxY, "Should be at the bottom");
// Register a TransformEnd observer so we can tell when the smooth scroll
// animation stops.
let transformEndPromise = promiseTransformEnd();
// Trigger smooth scrolling, and quickly insert an element which takes
// space into the DOM.
//
// It is important that it actually takes space so as to trigger scroll
// anchoring.
targetElement.scrollIntoView({ behavior: "smooth" });
targetElement.appendChild(document.createElement("div"));
// Wait for the TransformEnd.
await transformEndPromise;
// Give scroll offsets a chance to sync.
await promiseApzFlushedRepaints();
// Check that the async smooth scroll finished.
is(window.scrollY, 0, "Should've completed the smooth scroll without getting interrupted by scroll anchoring");
}
waitUntilApzStable()
.then(test)
.then(subtestDone, subtestFailed);
</script>
|