social-app / src / lib / hooks / useInitialNumToRender.ts

import React from 'react'
import {Dimensions} from 'react-native'

const MIN_POST_HEIGHT = 100

export function useInitialNumToRender(minItemHeight: number = MIN_POST_HEIGHT) {
  return React.useMemo(() => {
    const screenHeight = Dimensions.get('window').height
    return Math.ceil(screenHeight / minItemHeight) + 1
  }, [minItemHeight])
}