fix: in if-needed mode, skip bounds checking for non-scrollable scrollingElement #915
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Lack of proper handling causes scroll to jump unexpectedly when targeting elements that are already in view but outside of the bounding box of the
<html>element in apps that use styles liketo implement e.g. sticky footers
The proposed fix (checking whether
document.scrollingElementis actually scrollable before checking the target element is within its bounds) is consistent with how frames other thandocument.scrollingElementare handled in code and also with the.scrollIntoViewIfNeeded()behavior in Chrome /.focus()in most browsers.A workaround would be to use a more modern approach like
min-height: 100vhon a specific container that needs to stretch to the height of the viewport instead, which is not always possible in legacy apps.