1  import { useEffect, useState } from 'react'
 2  
 3  export function useTimeLeft(timeEndAt: number): number {
 4    const [timeLeft, setTimeLeft] = useState(timeEndAt - Math.floor(Date.now() / 1000))
 5  
 6    useEffect(() => {
 7      const timer = setInterval(() => setTimeLeft(timeEndAt - Math.floor(Date.now() / 1000)), 1000)
 8  
 9      return () => clearInterval(timer)
10    }, [])
11  
12    return timeLeft
13  }