how does getItemHeight work?

[pierroo]

Can we have an example of how getItemHeight works?
the doc feels unclear to me;

if my section header is 44px
and each of my list items are 40px

what should I put in getItemHeight ?

[simonho1025]

Yes, the doc is unclear. You can return the number like this:

getItemHeight={() => 40}

also set the sectionHeaderHeight:

sectionHeaderHeight={44}

same issue on #65