npm install moment-isocalendar
If you are looking for a Python-like isocalendar method, you can use Rocky Meza's plugin
Calling the isocalendar method on a moment will return an array like the following:
[year, week_of_year, day_of_week, minutes_since_midnight]
moment().isocalendar(); // [2012, 8, 5, 870]
You can also reconstruct a moment from a isocalendar array.
moment.fromIsocalendar([2011, 51, 5, 870]).format('LLLL'); // "Friday, December 23 2011 2:30 PM"
The repository is located at github.com/fusionbox/moment-isocalendar.