Getting date by Year and Week number and get Week Number and Year Number back

Question

I'm trying to generate date by year, week and day number ie

let date = moment().year(2019).isoWeek(1).isoWeekday(1).toDate(); 
//Mon Dec 31 2018 11:56:45 GMT+0100 (Central European Standard Time)

the problem i'm facing when i want to get year and week from this generated date

moment(date).year() //2018 
moment(date).isoWeek() // 1 

NOT SURE HOW TO SOLVE THIS

Answer 1

阅读有关年份访问器的文档 ，您将找到“ 周年（ISO）”部分：

moment(date).isoWeekYear() // 2019