Moment.js将星期定为星期一

Question

In my case, I receive a date in YYYY-mm-dd format. I want to get its week number as an output (first day of the week being Monday instead of Sunday):

    //This exact day is Sunday and the week number should be '1' - I get '2' instead

    var date = '2016-01-03' 
    var dateSplit = date.split('-')
    var weekNumber = moment(
    [dateSplit [0],
    dateSplit [1] - 1,
    dateSplit [2]]).week()

    console.log(weekNumber) --> returns '2'

Answer 1

Add this to your code

moment.updateLocale('en', {
  week: {
    dow : 1, // Monday is the first day of the week.
  }
});

 moment.updateLocale('en', { week: { dow : 1, // Monday is the first day of the week. } }); var weeknumber = moment("2016-01-02", "YYYY-MM-DD").week(); var weeknumber2 = moment("2016-01-03", "YYYY-MM-DD").week(); console.log("02 is in week " + weeknumber); console.log("03 is in week " + weeknumber2); 

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