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Improve window scroll

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scroll alias for scrollTo

add get_scrollX and get_scrollY, along with their aliases: pageXOffset and
pageYOffset. These always return 0, unless scroll or scrollTo are called.
This commit is contained in:
Karl Seguin
2025-10-01 18:41:56 +08:00
parent c891322129
commit 15b64d5a25
2 changed files with 66 additions and 5 deletions
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31
src/tests/window/window.html
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@@ -1,6 +1,6 @@
<!DOCTYPE html>
<script src="../testing.js"></script>
<body></body>
<body style=height:4000px;width:4000px></body>
<script id=aliases>
testing.expectEqual(window, window.self);
testing.expectEqual(window, window.parent);
@@ -82,12 +82,41 @@
<script id=scroll>
let scroll = false;
let scrollend = false
window.addEventListener('scroll', () => {scroll = true});
document.addEventListener('scrollend', () => {scrollend = true});
window.scrollTo(0, 0);
testing.expectEqual(0, scrollX);
testing.expectEqual(0, pageXOffset);
testing.expectEqual(0, scrollY);
testing.expectEqual(0, pageYOffset);
testing.expectEqual(true, scroll);
testing.expectEqual(true, scrollend);
window.scrollTo(10, 20);
testing.expectEqual(10, scrollX);
testing.expectEqual(10, pageXOffset);
testing.expectEqual(20, scrollY);
testing.expectEqual(20, pageYOffset);
window.scrollTo(-10, -20);
testing.expectEqual(0, scrollX);
testing.expectEqual(0, pageXOffset);
testing.expectEqual(0, scrollY);
testing.expectEqual(0, pageYOffset);
window.scrollTo({top: 30, left: 40});
testing.expectEqual(40, scrollX);
testing.expectEqual(40, pageXOffset);
testing.expectEqual(30, scrollY);
testing.expectEqual(30, pageYOffset);
window.scrollTo({top: -30, left: -40});
testing.expectEqual(0, scrollX);
testing.expectEqual(0, pageXOffset);
testing.expectEqual(0, scrollY);
testing.expectEqual(0, pageYOffset);
</script>
<script id=queueMicroTask>