时间函数

获取最近七天(含今天)

  const lastSevenDays = () => {
    const days = []
    for (let i = 6; i >= 0; i--) {
      const day = new Date()
      day.setDate(day.getDate() - i)
      const month = day.getMonth() + 1
      const date = day.getDate()
      const formattedDate = month + '月' + date + '日'
      days.push(formattedDate)
    }
    return days
  }

获取当前时间 时/分/秒

import { useEffect, useState } from 'react'

function useCurrentTime() {
  const [currentTime, setCurrentTime] = useState(new Date())

  useEffect(() => {
    const intervalId = setInterval(() => {
      setCurrentTime(new Date())
    }, 1000)

    return () => {
      clearInterval(intervalId)
    }
  }, [])

  const formattedTime = `${currentTime.getHours().toString().padStart(2, '0')}:${currentTime.getMinutes().toString().padStart(2, '0')}:${currentTime.getSeconds().toString().padStart(2, '0')}`

当前星期

import { useState, useEffect } from 'react'

function useDayOfWeek() {
  const [dayOfWeek, setDayOfWeek] = useState('')

  useEffect(() => {
    const weekdays = ['星期日', '星期一', '星期二', '星期三', '星期四', '星期五', '星期六']
    const now = new Date()
    const currentDayOfWeek = weekdays[now.getDay()]
    setDayOfWeek(currentDayOfWeek)
//  可以把定时器去掉  
    const intervalId = setInterval(() => {
      const newNow = new Date()
      const newDayOfWeek = weekdays[newNow.getDay()]
      setDayOfWeek(newDayOfWeek)
    }, 60 * 1000) // 每分钟更新一次

    return () => clearInterval(intervalId)
  }, [])

  return dayOfWeek
}

当前日期

import { useState, useEffect } from 'react'

function useFormattedDate() {
  const [formattedDate, setFormattedDate] = useState('')

  useEffect(() => {
    const formatDate = date => {
      const year = date.getFullYear()
      const month = ('0' + (date.getMonth() + 1)).slice(-2)
      const day = ('0' + date.getDate()).slice(-2)
      return `${year}/${month}/${day}`
    }
    const now = new Date()
    const currentFormattedDate = formatDate(now)
    setFormattedDate(currentFormattedDate)
  }, [])

  return formattedDate
}