If height of item i has already been determined, it is set in itemSize[i]. Otherwise, itemSize[i] is undefined.
i
itemSize[i]
undefined
Number of non-undefined values in itemSize.
itemSize
Sum of non-undefined values in itemSize.
Generated using TypeDoc
If height of item
ihas already been determined, it is set initemSize[i]. Otherwise,itemSize[i]isundefined.