JavaScript date processing class library moment acquisition time

//Installation momentnpm install moment -- save

//Introduce globally inimport moment from "moment"

//import methodimport 'moment/locale/zh-cn'
('zh-cn');   

.$moment = moment;

moment().subtract(13, "days").calendar(); // The calendar time for the current time is 13 days ahead: 2024/07/16moment().subtract(3, "days").calendar(); // The current time is 3 days ahead: 16:46 this Wednesdaymoment().subtract(1, "days").calendar(); // The current time is 1 day ahead: Yesterday was 16:47moment().calendar(); // Today is 16:48moment().add(1, "days").calendar(); // The current time will be pushed back by 1 day: tomorrow at 16:49moment().add(3, "days").calendar(); // The current time will be pushed back 3 days: Next Tuesday at 16:50moment().add(10, "days").calendar(); // The current time is pushed back10sky： 2024/07/06

//Get the current timemoment();//Sun Jun 04 2023 15:12:11 GMT+0800

//Get today 0:00:00:00moment().startOf('day'); /Sun Jun 04 2024 00:00:00 GMT+0800

//Get the first day of the week (Sunday) 0:00:00moment().startOf("week"); //Mon May 29 2024 00:00:00 GMT+0800

//Get this week's Monday 0:00:00moment().startOf("isoWeek"); //Mon May 29 2024 00:00:00 GMT+0800

//Get the first day of the current month 0:0:00:00:00moment().startOf("month"); //Thu Jun 01 2024 00:00:00 GMT+0800

//Get today at 23:59:59:59moment().endOf("day"); //Sun Jun 04 2024 23:59:59 GMT+0800

//Get the last day of the week (Saturday) 23:59:59moment().endOf("week"); //Sun Jun 04 2024 23:59:59 GMT+0800

//Get this Sunday at 23:59:59moment().endOf("isoWeek"); //Sun Jun 04 2024 23:59:59 GMT+0800

//Get the last day of the current month at 23:59:59 secondsmoment().endOf("month"); //Fri Jun 30 2024 23:59:59 GMT+0800

//Get the total number of days in the current monthmoment().daysInMonth(); //30

//Get the timestamp (in seconds)moment().unix(); //1685863710
moment().format('X'); //1685863669

//Get the timestamp (in milliseconds)moment().valueOf(); //The return value is numerical type: 1685863954482moment().format('x'); // The return value is string type: 1685863897121
//Get yearmoment().year(); //2024
moment().get("year"); //2024

//Get Monthmoment().month(); //5
moment().get("month"); //5

//Get a day of the monthmoment().date(); //4
moment().get("date"); //4

//Get a day of the weekmoment().day(); //4
moment().weekday(); //6
moment().isoWeekday(); //7
moment().get("day"); //0
moment().get("weekday"); //6
moment().get("isoWeekday"); //7

//Get hoursmoment().hours(); //15
moment().get("hours"); //15

//Get minutesmoment().minutes(); //46
moment().get("minutes"); //46

//Get the secondsmoment().seconds(); //24
moment().get("seconds"); //41

//Get the current year, month, day, hour, minute, secondmoment().toArray(); //[ 2024, 5, 4, 15, 48, 40, 288 ]
moment().toObject(); //{ "years": 2024, "months": 5, "date": 4, "hours": 15, "minutes": 49, "seconds": 9, "milliseconds": 386 }

//Current timemoment()  

//China Standard Timemoment().toDate()

//Format the current timemoment().format('YYYY-MM-DD')

//12-hour system:moment().format('YYYY-MM-DD hh:mm:ss')

//24-hour system: //Kk has problems changing to HHmoment().format('YYYY-MM-DD kk:mm:ss')
moment().format('YYYY-MM-DD HH:mm:ss')


//Early this monthmoment().startOf('month')

//At the end of this monthmoment().endOf('month')

//N days/month/hour latermoment().add(5, 'month')

//Date after 5 months, if the parameter is negative, it means before. The parameter 'month' can also be 'day' and 'hour'

//The first 10 days of the current timemoment().subtract(10, "days").format("YYYY-MM-DD"); 

//The first year of the current timemoment().subtract(1, "years").format("YYYY-MM-DD"); 

//The first 3 months of the current timemoment().subtract(3, "months").format("YYYY-MM-DD"); 

//The previous week of the current timemoment().subtract(1, "weeks").format("YYYY-MM-DD"); 

//Introduceimport moment from 'moment';
//Get how many weeks of the year, the start and end time of each week are thereconst mapWeeksOfyear = ({ year} = {}) => {
    const nowYear = year ? year : moment().year();
    const timestamp = (new Date()).valueOf()
        // Set the year being processed    let handleYear = moment(new Date(String(nowYear)));
      // How many weeks have there been in this year    const totalWeeks = ('year').isoWeek();
    const arryWeek  = [];
    let currentWeek = null; //What week is the current date    for(let i = 1;i <= totalWeeks;i++){
        let startOf = (i).startOf('week').format('MM-DD');
        let endOf = (i).endOf('week').format('MM-DD');
        let ednyear = (i).endOf('week').format('YYYY');
        let  startValue= (i).startOf('week').valueOf();
        let  endValue= (i).endOf('week').valueOf();
        if(startValue<=timestamp&&endValue>=timestamp){
            currentWeek = i
        }
        ({
            value: i,
            name: `The${i}week ${ednyear>nowYear?nowYear + "-" +startOf :startOf} to ${ednyear>nowYear?ednyear + "-" +endOf:endOf}`,
            startTime: (i).startOf('week').format('YYYY-MM-DD'),// The start time of this week            endTime: (i).endOf('week').format('YYYY-MM-DD'), // The end time of this week        })
    } 
    return {arryWeek,currentWeek}
}