import { useState, useEffect } from 'react' import dayjs from 'dayjs' import './index.less'; const toStr = () => { const now = new Date(); return dayjs(now).format('HH:mm:ss') } export default function Time(props) { const [current, setCurrent] = useState(); useEffect(() => { setCurrent(toStr()) setInterval(() => { setCurrent(toStr()) }, 1000) }, []) return