获取当前所在周的起始和结束的日期

/**
 * 获取当前星期的起始日期和结束日期
 * @param {string} startFormat 周一的时间格式
 * @param {string} endFormat   周日的时间格式
 * @param {number} timestamp   所在周的时间戳，若不传入，则默认使用当前时刻的时间戳
 * @returns {string, string} {startDate, endDate} 返回的数据
 */
export const getWeekStartAndEnd = (
    startFormat: string,
    endFormat: string,
    timestamp?: number
): {
    startDate: string,
    endDate: string,
} => {
    const oneDayTime = 1000 * 3600 * 24;
    const nowDate = timestamp ? new Date(timestamp) : new Date();
    const now = nowDate.getTime();
    const nowDay = nowDate.getDay() === 0 ? 7 : nowDate.getDay();
    const startDate = new Date(now - oneDayTime * (nowDay - 1));
    const endDate = new Date(now + oneDayTime * (7 - nowDay));

    return {
        startDate: formatTime(startDate.getTime(), startFormat),
        endDate: formatTime(endDate.getTime(), endFormat),
    };
};