Moment get week, month, quarter, year

Get week

	moment().week();// Current week （number）
	moment().startOf('isoWeek');// Start time of current week 
	moment().endOf('isoWeek');// End of current week 
	moment().add(-1, 'W');// Last week 
	moment().add(1, 'W');// next week 
	// Note last week  -1  next week  +1  And so on   month 、 quarter 、 Same as year 

Get the month

	moment().month();// The current month -1（number）
	moment().startOf('month');// Start time of current month 
	moment().endOf('month');// End time of current month 
	moment().add(-1, 'M');// Last month 
	moment().add(1, 'M');// Next month 

Get Quarterly

	moment().quarter();// The current quarter （number）
	moment().startOf('quarters');// Start time of the quarter 
	moment().endOf('quarters');// End time of the quarter 
	moment().add(-1, 'Q');// the previous quarter 
	moment().add(1, 'Q');// Next quarter 

Get the timestamp of the start and end of the currently selected quarter

quarter(e){
    
    //e Currently selected quarter  
    let nowQuarter = moment().quarter();
    // If quarter is not selected   Get the current quarter by default 
    e = e || nowQuarter
    let monthArray = [1,4,7,10];
    //  Get the month corresponding to the quarter 
    let month = monthArray[e - 1];
    let m = moment().month(month).date(5);
    this.form.startTime = m.startOf('quarters').toDate().getTime();
    this.form.endTime = m.endOf('quarters').toDate().getTime();
 
}
 

Year of acquisition

moment().year();// The current year （number）
moment().startOf('year');// Start time of the year 
moment().endOf('year');// End time of the year 
moment().add(-1, 'y');// The previous year 
moment().add(1, 'y');// Next year 

Is it a leap year

moment().isLeapYear();
# true
 
moment([2001]).isLeapYear() 
# false

Get the day of the week the first day of the month

#  Used to set the day of the week , Sunday is  0、 Saturday is  6
moment().startOf('month').day()

Before acquisition n God / after n God

moment().add(7, 'days');
moment().subtract(7, 'days')