JS获取本周、本月的开始日期和结束日期

  /**
   * 获得本周的开始日期和结束日期
   */
  getWeekStartDateAndEndDateRange() {
    let oneDayLong = 24*60*60*1000 ;
    let now = new Date();
    let mondayTime = now.getTime() - (now.getDay()-1)*oneDayLong;
    let sundayTime = now.getTime() + (7-now.getDay())*oneDayLong;
    let monday = new Date(mondayTime);
    let sunday = new Date(sundayTime);
    let weekRange = [monday, sunday];
    console.log(weekRange);
    return weekRange;
  }

  /**
   *获得本月的开始日期和结束日期
   */
  getMonthStartDateAndDateRange() {
    let oneDayLong = 24*60*60*1000;
    let now = new Date();
    let year = now.getFullYear();
    console.log(now+","+year);
    let monthStartDate = new Date(year, now.getMonth()+1, 1);//当前月1号
    let nextMonthStartDate = new Date(year, now.getMonth()+2, 1);//下个月1号
    let days = (nextMonthStartDate.getTime() -         
    monthStartDate.getTime())/oneDayLong;//计算当前月份的天数
    let monthEndDate = new Date(year, now.getMonth()+1, days);
    let monthRange = [monthStartDate,monthEndDate];
    console.log(monthRange);
    return monthRange;
  }