React: Hook for scrolling a page all the way up.

up.js

import { useState, useEffect } from 'react'

export default function useScrollUp() {
  const [init, setInit] = useState(true)

  useEffect(() => {
    if (init) {
      window.scrollTo(0, 0)
      setInit(false)
    }
  }, [init, setInit])
}