uniswap_interface_sc/apps/web/src/hooks/useLast.ts at main · stringcode86/uniswap_interface_sc · GitHub

Repository navigation

20 lines (19 loc) · 613 Bytes

import { useEffect, useState } from 'react'

/**

* Returns the last value of type T that passes a filter function

* @param value changing value

* @param filterFn function that determines whether a given value should be considered for the last value

export default function useLast<T>(value: T, filterFn?: (value: T) => boolean): T {

const [last, setLast] = useState<T>(value)

useEffect(() => {

setLast((last) => {

const shouldUse: boolean = filterFn ? filterFn(value) : true

if (shouldUse) {

return value

}

return last

})

}, [filterFn, value])

return last

}