问题背景
获取 当前周 | 上一周 | 下一周 的第一天（周一）和最后一天（周天）。
例如：
输入：2024-6-21, 'current'
输出：{"firstDay": "2024-6-17","lastDay": "2024-6-23"}输入：2024-6-21, 'last'
输出：{"firstDay": "2024-6-10","lastDay": "2024-6-16"}输入：2024-6-21, 'next'
输出：{"firstDay": "2024-6-24","lastDay": "2024-6-30"}
代码实现
/*** @description 获取当前周 | 上一周 | 下一周 的第一天和最后一天* @author Joyce Lee* @date 2024-6-19* @param today* @param status* @returns {{firstDay: Date, lastDay: Date}}*/
export const getFirstAndLastDayOfCurrentWeek = (today = new Date(), status = 'current') => {today = new Date(today);const currentDay = today.getDay(); // 0（星期日）到 6（星期六）// 获取本周第一天（星期一）const firstDay = new Date(today);// 获取本周最后一天（星期日）const lastDay = new Date(today);switch (status) {case 'current':firstDay.setDate(today.getDate() - currentDay + 1);lastDay.setDate(today.getDate() + (6 - currentDay + 1));break;case 'last':firstDay.setDate(today.getDate() - (currentDay === 0 ? 6 : currentDay - 1) - 7)lastDay.setDate(today.getDate() - currentDay)break;case 'next':firstDay.setDate(today.getDate() + (8 - currentDay))lastDay.setDate(today.getDate() + (14 - currentDay))}return {firstDay: firstDay,lastDay: lastDay};
}
测试
console.log(getFirstAndLastDayOfCurrentWeek())
// {"firstDay": "2024-6-17","lastDay": "2024-6-23"}
console.log(getFirstAndLastDayOfCurrentWeek('2024-6-21', 'last'))
// {"firstDay": "2024-6-10","lastDay": "2024-6-16"}
console.log(getFirstAndLastDayOfCurrentWeek('2024-6-21', 'next'))
// {"firstDay": "2024-6-24","lastDay": "2024-6-30"}