mirror of
https://github.com/servo/servo.git
synced 2025-07-01 12:33:40 +01:00
49 lines
2.1 KiB
HTML
49 lines
2.1 KiB
HTML
<!DOCTYPE html>
|
|
<title>transforms on position:sticky elements should apply after sticking</title>
|
|
<link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" />
|
|
<meta name="assert" content="This test checks that transforms on position:sticky elements are carried out on their stuck position" />
|
|
|
|
<script src="/resources/testharness.js"></script>
|
|
<script src="/resources/testharnessreport.js"></script>
|
|
|
|
<script src="resources/sticky-util.js"></script>
|
|
|
|
<body style="margin: 0;"></body>
|
|
|
|
<script>
|
|
test(() => {
|
|
const elements = setupStickyTest('top', 50);
|
|
elements.sticky.style.transform = 'scale(2)';
|
|
elements.scroller.scrollTop = 200;
|
|
|
|
// Transforms don't affect offsetTop, so use getBoundingClientRect.
|
|
// Scaling the sticky element by 2 means its top-y moves (1/2 * height)
|
|
// upwards, in this case placing it at the top of the viewport.
|
|
const boundingRect = elements.sticky.getBoundingClientRect();
|
|
assert_equals(boundingRect.y, elements.scroller.getBoundingClientRect().y);
|
|
}, 'Scale transforms are carried out on the stuck element position');
|
|
|
|
test(() => {
|
|
const elements = setupStickyTest('top', 50);
|
|
elements.sticky.style.transform = 'rotateX(60deg)';
|
|
elements.scroller.scrollTop = 200;
|
|
|
|
// Transforms don't affect offsetTop, so use getBoundingClientRect.
|
|
// Rotating around the x-axis essentially 'squashes' it (from the camera's
|
|
// viewpoint), in this case shifting the offset to 75 rather than 50.
|
|
const stickyElementOffset = elements.sticky.getBoundingClientRect().y -
|
|
elements.scroller.getBoundingClientRect().y;
|
|
assert_equals(stickyElementOffset, 75);
|
|
}, 'Rotate transforms are carried out on the stuck element position');
|
|
|
|
test(() => {
|
|
const elements = setupStickyTest('top', 50);
|
|
elements.sticky.style.transform = 'perspective(3px) translateZ(1px)';
|
|
elements.scroller.scrollTop = 200;
|
|
|
|
// Transforms don't affect offsetTop, so use getBoundingClientRect.
|
|
const stickyElementOffset = elements.sticky.getBoundingClientRect().y -
|
|
elements.scroller.getBoundingClientRect().y;
|
|
assert_equals(stickyElementOffset, 25);
|
|
}, 'Perspective transforms are carried out on the stuck element position');
|
|
</script>
|