Moment.js返回意外的年份

Question

I'm struggling with the new year 2017 in my web app using moment.js.

When I'm writing:

moment('2017-01-03').isoWeekYear(2016).week(52); // results = Dec 27 2015

meanwhile when i write:

moment('2017-01-04').isoWeekYear(2016).week(52); //results = Dec 26 2016

My expectation is that both of these should give me the answer "Dec 26 2016". Probably I'm thinking wrong or could this be a bug in moment.js?

I have struggled for a while to come up with an answer or a workaround without any success..

Answer 1

Are you using an up to date version of moment.js? Something is off, because here's what I get when I run your moment.js code:

 console.log(moment('2017-01-03').isoWeekYear(2016).week(52)); console.log(moment('2017-01-04').isoWeekYear(2016).week(52)); 

 <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.17.1/moment.min.js"></script> 

"2016-12-20T05:00:00.000Z"
"2016-12-21T05:00:00.000Z"