This is related to #49 and #65 (which is a duplicate of the former). If scrollToItem() is used to jump to an element near the bottom of the list (ie. it is visible when the list is manually scrolled to the end), the elements above it are not displayed: this is #49.
If the call to scrollToItem() is repeated though, the height of the list is reduced with each call until the item is positioned at scrollTop. If the list is very short, ie. less than two container element heights, the first call may be enough to reach scrollTop.
There's also the problem that this moving to scrollTop doesn't seem to take into account the value of _aboveSize, which means that if the <core-list> is using its parent as the scrollTarget, and the parent has other elements above the <core-list>, they'll get overlapped with the <core-list> items.
This can be replicated on the <core-list> demo page: just delete the 50,000 rows generated by default and add a small number of new rows, then start calling scrollToItem() on them through the console.
Ortham
commented
7 years ago
This is related to #49 and #65 (which is a duplicate of the former). If
scrollToItem()is used to jump to an element near the bottom of the list (ie. it is visible when the list is manually scrolled to the end), the elements above it are not displayed: this is #49.If the call to
scrollToItem()is repeated though, the height of the list is reduced with each call until the item is positioned atscrollTop. If the list is very short, ie. less than two container element heights, the first call may be enough to reachscrollTop.There's also the problem that this moving to
scrollTopdoesn't seem to take into account the value of_aboveSize, which means that if the<core-list>is using its parent as thescrollTarget, and the parent has other elements above the<core-list>, they'll get overlapped with the<core-list>items.This can be replicated on the
<core-list>demo page: just delete the 50,000 rows generated by default and add a small number of new rows, then start callingscrollToItem()on them through the console.