'paginationRange.length' is possibly 'undefined'.ts(18048)
I don't know how to get rid of this
error 'paginationRange.length' is possibly 'undefined'.ts(18048)
export type IPaginate = {
totalCount: number
pageSize: number
siblingCount: number
currentPage: number
onPageChange?: () => void
}
paginateHook.ts 👇
export const usePagination = ({totalCount, pageSize, siblingCount = 1, currentPage}: IPaginate) => {
// do something here
}
UsePaginate.tsx 👇
const paginationRange = usePagination({
currentPage,
totalCount,
siblingCount,
pageSize
})
if ( currentPage === 0 || paginationRange?.length < 2){ // 'paginationRange.length' is possibly 'undefined'.ts(18048)
return null
}
3 Replies
when
paginationRange is falsey, paginationRange.length returns undefined as well. Then you are comparing undefined to a number, which doesn't make sense (JS will always return false, but TS does not allow that comparison).Unknown User•3y ago
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Resolved thanks