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<!doctype html>
<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="/dom/events/scrolling/scroll_support.js"></script>
<script src="/css/css-scroll-snap/support/common.js"></script>
<link rel="help" href="https://drafts.csswg.org/css-overscroll-behavior">
<style>
body {
margin: 0;
width: 150vw;
height: 150vh;
}
#container {
width: 500px;
height: 300px;
border: 2px solid orange;
border-radius: 5px;
overflow: scroll;
}
#content {
background: repeating-linear-gradient(to bottom right, blue 15%, white 30%);
width: 400px;
height: 200px;
}
</style>
<body>
<div id="container">
<div id="content"></div>
</div>
</body>
<script>
const container = document.getElementById('container');
const content = document.getElementById('content');
const scrollAmount = 120;
const scrollRight = { dx: scrollAmount, dy: 0 };
const scrollDown = { dx: 0, dy: scrollAmount };
const startPosition = { x: 200, y: 100 };
async function performGestureScroll(posX, posY, deltaX, deltaY) {
await new test_driver.Actions()
.scroll(posX, posY, deltaX, deltaY)
.send();
await waitForCompositorCommit();
}
promise_test(async (t) => {
window.scrollTo(0, 0);
container.style.overflow = 'hidden';
container.style.overscrollBehaviorX = 'none';
container.style.overscrollBehaviorY = 'auto';
await waitForCompositorCommit();
assert_equals(window.scrollX, 0);
assert_equals(window.scrollY, 0);
await performGestureScroll(
startPosition.x, startPosition.y, scrollRight.dx, scrollRight.dy);
assert_equals(window.scrollX, 0);
await performGestureScroll(
startPosition.x, startPosition.y, scrollDown.dx, scrollDown.dy);
assert_greater_than(window.scrollY, 100);
}, 'overflow: hidden and overscroll-behavior-x: none should only prevent ' +
'scroll propagation on x axis.');
promise_test(async (t) => {
window.scrollTo(0, 0);
container.style.overflow = 'hidden';
container.style.overscrollBehaviorX = 'auto';
container.style.overscrollBehaviorY = 'none';
await waitForCompositorCommit();
assert_equals(window.scrollX, 0);
assert_equals(window.scrollY, 0);
await performGestureScroll(
startPosition.x, startPosition.y, scrollRight.dx, scrollRight.dy);
assert_greater_than(window.scrollX, 100);
await performGestureScroll(
startPosition.x, startPosition.y, scrollDown.dx, scrollDown.dy);
assert_equals(window.scrollY, 0);
}, 'overflow: hidden and overscroll-behavior-y: none should only prevent ' +
'scroll propagation on y axis.');
promise_test(async (t) => {
window.scrollTo(0, 0);
container.style.overflow = 'auto';
container.style.overscrollBehaviorX = 'none';
container.style.overscrollBehaviorY = 'auto';
await waitForCompositorCommit();
assert_equals(window.scrollX, 0);
assert_equals(window.scrollY, 0);
await performGestureScroll(
startPosition.x, startPosition.y, scrollRight.dx, scrollRight.dy);
assert_equals(window.scrollX, 0);
await performGestureScroll(
startPosition.x, startPosition.y, scrollDown.dx, scrollDown.dy);
assert_greater_than(window.scrollY, 100);
}, 'overflow: auto and overscroll-behavior-x: none should only prevent ' +
'scroll propagation on x axis.');
promise_test(async (t) => {
window.scrollTo(0, 0);
container.style.overflow = 'auto';
container.style.overscrollBehaviorX = 'auto';
container.style.overscrollBehaviorY = 'none';
await waitForCompositorCommit();
assert_equals(window.scrollX, 0);
assert_equals(window.scrollY, 0);
await performGestureScroll(
startPosition.x, startPosition.y,
scrollRight.dx, scrollRight.dy);
assert_greater_than(window.scrollX, 100);
await performGestureScroll(
startPosition.x, startPosition.y,
scrollDown.dx, scrollDown.dy);
assert_equals(window.scrollY, 0);
}, 'overflow: auto and overscroll-behavior-y: none should only prevent ' +
'scroll propagation on y axis.');
</script>
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