Compass/web/components/back-button.tsx

import {ArrowLeftIcon} from '@heroicons/react/solid'
import clsx from 'clsx'
import {useRouter} from 'next/navigation'
import {useEffect, useState} from 'react'
import {Button} from 'web/components/buttons/button'

export function BackButton(props: {className?: string}) {
  const {className} = props
  const router = useRouter()
  const [canGoBack, setCanGoBack] = useState(false)

  // Can't put this in a useMemo to avoid the page jump else we'll get hydration errors.
  useEffect(() => {
    setCanGoBack(typeof window !== 'undefined' && window.history.length > 1)
  }, [])

  if (!canGoBack) return null

  return (
    <Button className={clsx('rounded-none', className)} onClick={router.back} color={'gray-white'}>
      <ArrowLeftIcon className="h-5 w-5" aria-hidden />
      <div className="sr-only">Back</div>
    </Button>
  )
}