js日期范围：本周/上周/本月/上月

用于日期范围选择器快捷项，忽略具体时间，包含今日/昨日/本周/上周/本月/上月。

/*** 今日* @returns {Date[]}*/
function today () {const now = new Date()return [now, now]
}/*** 昨日* @returns {Date[]}*/
function yesterday () {const now = new Date()const yesterday = new Date()yesterday.setTime(now.getTime() - 24 * 60 * 60 * 1000)return [yesterday, yesterday]
}/*** 本周* @returns {Date[]}*/
function thisWeek () {const monday = new Date()const now = new Date()const todayOfWeek = now.getDay() || 7monday.setTime(now.getTime() - (todayOfWeek - 1) * 24 * 60 * 60 * 1000)return [monday, now]
}/*** 上周* @returns {Date[]}*/
function lastWeek () {const monday = new Date()const sunday = new Date()const now = new Date()const todayOfWeek = now.getDay() || 7sunday.setTime(now.getTime() - todayOfWeek * 24 * 60 * 60 * 1000)monday.setTime(sunday.getTime() - 6 * 24 * 60 * 60 * 1000)return [monday, sunday]
}/*** 本月* @returns {Date[]}*/
function thisMonth () {const firstDay = new Date()const now = new Date()firstDay.setDate(1)return [firstDay, now]
}/*** 上月* @returns {Date[]}*/
function lastMonth () {const lastDay = new Date()lastDay.setDate(0)const firstDay = new Date(lastDay)firstDay.setDate(1)return [firstDay, lastDay]
}

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