前端开发攻略---封装日历calendar组件（纯手搓），可以根据您的需求任意改变，可玩性强

1、演示

2、代码

<template><div class="box" v-if="startMonth.year"><div class="left"><div class="top"><span class="iconfont" @click="changeMonth(-1)">左</span><span>{{ startMonth.year }}年{{ startMonth.month }}月</span><span></span></div><div class="calendarMain"><div class="weeks"><span>日</span><span>一</span><span>二</span><span>三</span><span>四</span><span>五</span><span>六</span></div><div class="days"><divclass="day"v-for="item in startMonth.dates":class="monthDaysClass(item)":style="[{ '--ml': item.week }]"@mouseenter="dayMouseMove(item)"@click="dayMouseClick(item)">{{ item.day }}</div></div></div></div><div class="right"><div class="top"><span></span><span>{{ endMonth.year }}年{{ endMonth.month }}月</span><span class="iconfont" @click="changeMonth(1)">右</span></div><div class="calendarMain"><div class="weeks"><span>日</span><span>一</span><span>二</span><span>三</span><span>四</span><span>五</span><span>六</span></div><div class="days"><divclass="day"v-for="item in endMonth.dates":class="monthDaysClass(item)":style="[{ '--ml': item.week }]"@mouseenter="dayMouseMove(item)"@click="dayMouseClick(item)">{{ item.day }}</div></div></div></div></div>
</template><script setup>
import { ref, reactive, onMounted } from 'vue'
const currentDateIndex = ref(0)
const startMonth = ref({})
const endMonth = ref({})
const selectDate = ref([])
const isMove = ref(false)onMounted(() => {initCalendar()
})const initCalendar = () => {getCalendarData()const startIndex = startMonth.value.dates.findIndex(item => !item.isTodayBefore)if (startIndex == startMonth.value.dates.length - 1) {selectDate.value[0] = startMonth.value.dates[startIndex].yymmddselectDate.value[1] = endMonth.value.dates[0].yymmdd} else {selectDate.value[0] = startMonth.value.dates[startIndex].yymmddselectDate.value[1] = startMonth.value.dates[startIndex + 1].yymmdd}
}const getCalendarData = () => {startMonth.value = getMonthDates(currentDateIndex.value)endMonth.value = getMonthDates(currentDateIndex.value + 1)
}
const changeMonth = num => {currentDateIndex.value += numgetCalendarData()
}const monthDaysClass = item => {if (item.isTodayBefore) return 'disabled'if (item.yymmdd == selectDate.value[0]) return 'active'if (item.yymmdd == selectDate.value[1]) return 'active'if (getDatesBetween(selectDate.value[0], selectDate.value[1]).includes(item.yymmdd)) return 'middle'
}const getDatesBetween = (date1, date2) => {let dates = []let currentDate = new Date(date1)let endDate = new Date(date2)while (currentDate < endDate) {let dateString = currentDate.toISOString().substr(0, 10)dates.push(dateString)currentDate.setDate(currentDate.getDate() + 1)}if (dates.length > 0) {dates.shift()}return dates
}const dayMouseClick = item => {if (item.isTodayBefore) returnlet arr = [...selectDate.value]if (!isMove.value) {if (arr.length == 1) {arr[1] = item.yymmdd} else {arr = []arr[0] = item.yymmdd}isMove.value = true} else {isMove.value = false}if (arr[0] > arr[1]) {selectDate.value = arr.reverse()} else {selectDate.value = arr}console.log(selectDate.value)
}const dayMouseMove = item => {if (item.isTodayBefore) returnif (!isMove.value) returnselectDate.value[1] = item.yymmdd
}function getMonthDates(monthOffset) {const today = new Date()const targetDate = new Date(today.getFullYear(), today.getMonth() + monthOffset, 1)const year = targetDate.getFullYear()let month = targetDate.getMonth() + 1 // 月份是从0开始的，所以要加1month = month >= 10 ? month : '0' + monthconst firstDay = new Date(year, targetDate.getMonth(), 1)const lastDay = new Date(year, targetDate.getMonth() + 1, 0)const monthDates = []for (let d = firstDay; d <= lastDay; d.setDate(d.getDate() + 1)) {const day = d.getDate()const dayOfWeek = d.getDay() // 返回0到6，0代表星期日const isTodayBefore = d.getTime() < today.setHours(0, 0, 0, 0) // 判断是否是今天之前的日期monthDates.push({day,week: dayOfWeek,isTodayBefore,yymmdd: `${year}-${month}-${day >= 10 ? day : '0' + day}`,})}return { year, month, dates: monthDates }
}
</script><style scoped lang="scss">
.box {width: 793px;height: 436px;box-shadow: 2px 2px 6px #0003;display: flex;justify-content: space-between;padding: 30px 15px;.left,.right {width: 46%;height: 100%;.top {display: flex;justify-content: space-between;font-weight: bold;.iconfont {cursor: pointer;user-select: none;}}.calendarMain {.weeks {font-weight: bold;margin-top: 20px;display: flex;justify-content: space-between;& > span {display: inline-block;width: 50px;height: 50px;line-height: 50px;text-align: center;}}.days {display: flex;flex-wrap: wrap;cursor: pointer;.day {width: 50px;height: 50px;height: 50px;text-align: center;line-height: 50px;color: #111;font-size: 14px;}.day:nth-child(1) {margin-left: calc(var(--ml) * 50px);}.disabled {color: #ccc;cursor: not-allowed;}.active {background-color: #266fff;color: #fff;}.middle {background-color: rgba(38, 111, 255, 0.3);color: #fff;}}}}
}
</style>

3、代码解释

import { ref, reactive, onMounted } from 'vue'
import { useDatesBetween } from '@/hooks/time.js'
这里引入了 Vue 中的 ref 和 reactive 函数，以及 onMounted 钩子函数，以及从 time.js 模块中引入了 useDatesBetween 函数。
const currentDateIndex = ref(0)
const startMonth = ref({})
const endMonth = ref({})
const selectDate = ref([])
const getDatesBetween = useDatesBetween()
const isMove = ref(false)
创建了一些响应式变量，包括当前日期索引 currentDateIndex，起始月份 startMonth 和结束月份 endMonth 的引用，以及选择的日期范围 selectDate，useDatesBetween 函数的引用 getDatesBetween，以及一个标志 isMove，用于标记是否在移动状态。
onMounted(() => {initCalendar()
})
使用 onMounted 钩子，在组件挂载后执行 initCalendar 函数。
const initCalendar = () => {getCalendarData()const startIndex = startMonth.value.dates.findIndex(item => !item.isTodayBefore)if (startIndex == startMonth.value.dates.length - 1) {selectDate.value[0] = startMonth.value.dates[startIndex].yymmddselectDate.value[1] = endMonth.value.dates[0].yymmdd} else {selectDate.value[0] = startMonth.value.dates[startIndex].yymmddselectDate.value[1] = startMonth.value.dates[startIndex + 1].yymmdd}
}
initCalendar 函数初始化日历，获取日历数据并设置选择的日期范围。
const getCalendarData = () => {startMonth.value = getMonthDates(currentDateIndex.value)endMonth.value = getMonthDates(currentDateIndex.value + 1)
}
getCalendarData 函数获取当前月份和下个月份的日历数据。
const changeMonth = num => {currentDateIndex.value += numgetCalendarData()
}
changeMonth 函数根据给定的数字改变当前月份索引，并重新获取日历数据。
const monthDaysClass = item => {if (item.isTodayBefore) return 'disabled'if (item.yymmdd == selectDate.value[0]) return 'active'if (item.yymmdd == selectDate.value[1]) return 'active'if (getDatesBetween(selectDate.value[0], selectDate.value[1]).includes(item.yymmdd)) return 'middle'
}
monthDaysClass 函数根据日期项目返回对应的 CSS 类名，用于渲染日历中的日期。
const dayMouseClick = item => {if (item.isTodayBefore) returnlet arr = [...selectDate.value]if (!isMove.value) {if (arr.length == 1) {arr[1] = item.yymmdd} else {arr = []arr[0] = item.yymmdd}isMove.value = true} else {isMove.value = false}if (arr[0] > arr[1]) {selectDate.value = arr.reverse()} else {selectDate.value = arr}console.log(selectDate.value)
}
dayMouseClick 函数处理日期的点击事件，根据点击选择日期范围。
const dayMouseMove = item => {if (item.isTodayBefore) returnif (!isMove.value) returnselectDate.value[1] = item.yymmdd
}
dayMouseMove 函数处理鼠标移动事件，根据鼠标移动选择日期范围。
function getMonthDates(monthOffset) {const today = new Date()const targetDate = new Date(today.getFullYear(), today.getMonth() + monthOffset, 1)const year = targetDate.getFullYear()let month = targetDate.getMonth() + 1month = month >= 10 ? month : '0' + monthconst firstDay = new Date(year, targetDate.getMonth(), 1)const lastDay = new Date(year, targetDate.getMonth() + 1, 0)const monthDates = []for (let d = firstDay; d <= lastDay; d.setDate(d.getDate() + 1)) {const day = d.getDate()const dayOfWeek = d.getDay()const isTodayBefore = d.getTime() < today.setHours(0, 0, 0, 0)monthDates.push({day,week: dayOfWeek,isTodayBefore,yymmdd: `${year}-${month}-${day >= 10 ? day : '0' + day}`,})}return { year, month, dates: monthDates }
}
getMonthDates 函数根据月份偏移量获取该月的日期数据，包括年份、月份以及日期数组。