yuming
118 lines
2.5 KiB
JavaScript
118 lines
2.5 KiB
JavaScript
/**
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* 日期工具函数
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*/
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/**
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* 格式化日期
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* @param {Date} date - 日期对象
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* @param {String} format - 格式字符串，默认 'YYYY-MM-DD'
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* @returns {String} 格式化后的日期字符串
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*/
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function formatDate(date, format = 'YYYY-MM-DD') {
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if (!date) return ''
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const d = new Date(date)
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const year = d.getFullYear()
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const month = String(d.getMonth() + 1).padStart(2, '0')
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const day = String(d.getDate()).padStart(2, '0')
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const hour = String(d.getHours()).padStart(2, '0')
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const minute = String(d.getMinutes()).padStart(2, '0')
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const second = String(d.getSeconds()).padStart(2, '0')
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return format
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.replace('YYYY', year)
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.replace('MM', month)
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.replace('DD', day)
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.replace('HH', hour)
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.replace('mm', minute)
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.replace('ss', second)
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}
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/**
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* 计算距离今天还有多少天
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* @param {Date} targetDate - 目标日期
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* @returns {Number} 天数差
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*/
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function getDaysUntil(targetDate) {
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const today = new Date()
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today.setHours(0, 0, 0, 0)
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const target = new Date(targetDate)
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target.setHours(0, 0, 0, 0)
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const diff = target.getTime() - today.getTime()
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return Math.ceil(diff / (1000 * 60 * 60 * 24))
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}
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/**
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* 判断是否是今天
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*/
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function isToday(date) {
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return getDaysUntil(date) === 0
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}
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/**
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* 判断是否已过期
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*/
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function isPast(date) {
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return getDaysUntil(date) < 0
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}
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/**
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* 判断是否即将到来
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*/
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function isUpcoming(date) {
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const days = getDaysUntil(date)
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return days > 0 && days <= 7
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}
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/**
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* 获取星期几
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*/
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function getWeekDay(date) {
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const weekdays = ['日', '一', '二', '三', '四', '五', '六']
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const d = new Date(date)
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return weekdays[d.getDay()]
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}
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/**
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* 判断是否在本月
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*/
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function isInThisMonth(date) {
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const today = new Date()
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const target = new Date(date)
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return today.getFullYear() === target.getFullYear() &&
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today.getMonth() === target.getMonth()
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}
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/**
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* 获取本月的开始日期和结束日期
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*/
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function getMonthRange(year, month) {
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const start = new Date(year, month - 1, 1)
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const end = new Date(year, month, 0)
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return { start, end }
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}
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/**
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* 获取日期对象（从YYYY-MM-DD字符串）
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*/
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function parseDate(dateString) {
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if (!dateString) return null
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const parts = dateString.split('-')
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return new Date(parseInt(parts[0]), parseInt(parts[1]) - 1, parseInt(parts[2]))
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}
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module.exports = {
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formatDate,
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getDaysUntil,
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isToday,
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isPast,
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isUpcoming,
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getWeekDay,
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isInThisMonth,
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getMonthRange,
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parseDate
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}
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