https://dayjs.fenxianglu.cn/ 插件

主要代码：
let year = dayjs().year() // 默认今年
let date = dayjs().format(‘YYYY-MM-DD’) // 默认今天
let week = dayjs(date).week() -1 // 26 // 获取当前日期所处自然周
let weekCount = dayjs(year).isoWeeksInYear() -1 // 53 // 获取年份对应的周总数

 .leftBoxel-button-groupel-button(size="mini" @click="handleDateChange('previous')") 上一周el-button(size="mini" @click="handleDateChange('currentDate')") 今天el-button(size="mini" @click="handleDateChange('next')") 下一周

  data() {return {currentYear: null,currentWeek: null,maxWeeks: null,},}},

  methods: {// 事件: 上一周、今天、下一周 handleWeekChange(type) {if(type == 'currentDate') {// 本月或本周if(this.dateRangeType == '周') this.getWeekInit('init')return}if(type == 'previous') { // 点击上一周if(this.currentWeek === 1) {// 已经是第1周，年份-1this.currentYear--this.getWeekInit('reduce')}else {// 不是第1周，周数-1this.currentWeek--this.getWeekData()}}else {// 点击下一周if(this.currentWeek === this.maxWeeks) {// 已经是最后1周，年份+1this.currentYear++this.getWeekInit('increase')}else{// 不是最后1周，周数+1this.currentWeek++this.getWeekData()}}},// 初始化日期数据getWeekInit(type) { // init:初始化; increase: 年份加; reduce: 年份减// 下方代码中周总数和日期所处自然周都需要减1// 获取当前年份所处周总数-插件var isoWeeksInYear = require('dayjs/plugin/isoWeeksInYear')var isLeapYear = require('dayjs/plugin/isLeapYear') // dependent on isLeapYear plugindayjs.extend(isoWeeksInYear)dayjs.extend(isLeapYear)// 获取当前日期所处自然周-插件var weekOfYear = require('dayjs/plugin/weekOfYear')dayjs.extend(weekOfYear)// 计算if(type == 'init') { // 初始化this.currentYear = dayjs().year() // 默认今年let date = dayjs().format('YYYY-MM-DD') // 默认今天this.currentWeek = dayjs(date).week() -1 // 26 // 获取当前日期所处自然周}else {// 根据年份计算this.currentWeek = type == 'increase' ? '1' : this.maxWeeks // 下一年，周数为1。上一年周数为maxWeeks}this.maxWeeks = dayjs(this.currentYear).isoWeeksInYear() -1 // 53 // 获取年份对应的周总数this.getWeekData()},//getWeekData() {},},