Moment.js-如何获取给定月份不包括上个月和下个月的日期

问题描述

对于2020年8月，我需要这样的数据：-根据https://www.epochconverter.com/weeks/2020

Week 31 - 2020-08-01 to 2020-08-02

Week 32 - 2020-08-03 to 2020-08-09

Week 33 - 2020-08-10 to 2020-08-16

Week 34 - 2020-08-17 to 2020-08-23

Week 35 - 2020-08-24 to 2020-08-30

Week 35 - 2020-08-31 to 2020-08-31

根据此信息

这在我们将函数传递一年和一个月时应该起作用，因为它应该是通用的

必填输出

weekNumbers = ["Week 31","Week 32","Week 33","Week 34","Week 35","Week 36"]; // week number should not start from 1. it should be continuos from last year.

weekList = []; // this should contain start and end date for each week

提前谢谢

解决方法

1. 使用的公用变量：

   const monthIndex = 8; // give month index
   const year = 2020; // give year here
   

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1. 代码以获取月份的星期数：-

   const getWeekNumbers = (year,month) => {
     let firstWeek = moment(new Date(year,month,1)).isoWeek();   
     let lastWeek = moment(new Date(year,month + 1,0)).isoWeek();
   
     let out = [`Week ${firstWeek}`];
     if (firstWeek === 52 || firstWeek === 53) {
       firstWeek = 0;
     }
   
     for (let i = firstWeek + 1; i <= lastWeek; i++) {
       out.push(`Week ${i}`);
     }
     return out;
   };
   

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1. 用于获取月份的周列表数据的代码：-

   function getMomentDate(start,end) {
       return {
       startDate: moment([2020,monthIndex - 1,start]),endDate: moment([2020,end])
     }
   }
   
   function weeks (month) {
       const weekStartEndDay = [];
       const first = month.day() == 0 ? 6 : month.day()-1;
       let day = 7-first;
       const last = month.daysInMonth();
       const count = (last-day)/7;
   
       weekStartEndDay.push(getMomentDate(1,day));
       for (let i=0; i < count; i++) {
           weekStartEndDay.push(getMomentDate((day+1),(Math.min(day+=7,last))));
       }
       return weekStartEndDay;
   }
   

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1. 调用并获取输出：-

   const month = moment([year,monthIndex - 1])
   const weekNumbers = getWeekNumbers(year,monthIndex - 1);
   const weekList = weeks(month);
   console.log("weekNumbers",weekNumbers);
   console.log("weekList",weekList);
   weekList.forEach(date => {
       console.log("start - " + date.startDate.format('YYYY-MM-DD'),"\nend - " + date.endDate.format('YYYY-MM-DD'));
   });
   

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1. 2020年8月的控制台产量

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1. REPL链接：- https://repl.it/@SaHiLShiKalgar/WeekNumber-and-WeekList