Moment js date time comparison

Question

I m using moment js to format my date time  here I have two date values  and I want to achieve a particular function when one date is greater than the other  I read most of their docs  but didn t find the function to achieve this  I know it will be there    This is my code   var date time   2013-03-24    T    10 15 20 12    Z  var d   moment date time  tz  UTC       first date   var now   new Date        dnow   moment now  tz  UTC        snow   dnow minute     15      diffnow   15 - snow      tonow   moment dnow  add  minute   diffnow       ahead30now   moment tonow  add  minute   30    if  d  gt  ahead30now           allow input time     console log  UTC TIME DB   d format       else        Edit   var date time   req body date    T    req body time   req body timezone     2014-03-24T01 15 000 var utc input time   moment date time  utc       2014-03-24T01 15 000 console log  utc converted date time   moment date time  utc   format  YYYY-MM-DDTHH mm SSS     var isafter   moment utc input time  isAfter moment  2014-03-24T01 14 000        true if isafter     true       console log  is after true      else       console log  is after is false        Here  I am comparing two dates i e  2014-03-24T01 15 000  gt  2014-03-24T01 14 000  expecting that the first one is greater than the second one  but it always goes to the else condition  I don t know why

User · Answer

moment d  isAfter ahead30now      true   http   momentjs com docs   query is-after   if  moment d  isAfter ahead30now            allow input time     console log  UTC TIME DB   d format       else

User · Answer

I believe you are looking for the query functions  isBefore  isSame  and isAfter  But it s a bit difficult to tell exactly what you re attempting   Perhaps you are just looking to get the difference between the input time and the current time   If so  consider the difference function  diff   For example  moment   diff date time   minutes    A few other things   There s an error in the first line    var date time   2013-03-24    T    10 15 20 12    Z   That s not going to work   I think you meant    var date time    2013-03-24     T     10 15 20 12     Z    Of course  you might as well    var date time    2013-03-24T10 15 20 12Z     You re using   tz  UTC   incorrectly    tz belongs to moment-timezone  You don t need to use that unless you re working with other time zones  like America Los Angeles  If you want to parse a value as UTC  then use    moment utc theStringToParse   Or  if you want to parse a local value and convert it to UTC  then use    moment theStringToParse  utc    Or perhaps you don t need it at all   Just because the input value is in UTC  doesn t mean you have to work in UTC throughout your function   You seem to be getting the  quot now quot  instance by  moment new Date      You can instead just use moment      Updated Based on your edit  I think you can just do this  var date time   req body date    T    req body time    Z   var isafter   moment date time  isAfter  2014-03-24T01 14 00Z     Or  if you would like to ensure that your fields are validated to be in the correct format  var m   moment utc req body date         req body time   quot YYYY-MM-DD  HH mm ss quot    var isvalid   m isValid    var isafter   m isAfter  2014-03-24T01 14 00Z

User · Answer

for date-time comparison  you can use valueOf function of the moment which provides milliseconds of the date-time  which is best for comparison    x000D   x000D  let date1   moment  01-02-2020   DD-MM-YYYY   valueOf   x000D  let date2   moment  11-11-2012   DD-MM-YYYY   valueOf   x000D   x000D         alert  date1  gt  date2    date1     date2       is greater        x000D   x000D  if  date1  gt  date2    x000D     alert  date1 is greater       x000D    else   x000D     alert  date2 is greater       x000D    x000D   lt script src  https   cdnjs cloudflare com ajax libs moment js 2 24 0 moment min js  gt  lt  script gt  x000D   x000D   x000D

User · Answer

It is important that your datetime is in the correct ISO format when using any of the momentjs queries  isBefore  isAfter  isSameOrBefore  isSameOrAfter  isBetween  So instead of 2014-03-24T01 14 000  your datetime should be either       2014-03-24T01 14 00 or 2014-03-24T01 14 00 000Z   otherwise you may receive the following deprecation warning and the condition will evaluate to false      Deprecation warning  value provided is not in a recognized RFC2822 or   ISO format  moment construction falls back to js Date    which is not   reliable across all browsers and versions  Non RFC2822 ISO date   formats are discouraged and will be removed in an upcoming major   release  Please refer to   http   momentjs com guides   warnings js-date  for more info     x000D   x000D     https   momentjs com docs   query  x000D   x000D  const dateIsAfter   moment  2014-03-24T01 15 00 000Z   isAfter moment  2014-03-24T01 14 00 000Z     x000D   x000D  const dateIsSame   moment  2014-03-24T01 15 00 000Z   isSame moment  2014-03-24T01 14 00 000Z     x000D   x000D  const dateIsBefore   moment  2014-03-24T01 15 00 000Z   isBefore moment  2014-03-24T01 14 00 000Z     x000D   x000D  console log  Date is After    dateIsAfter     x000D  console log  Date is Same    dateIsSame     x000D  console log  Date is Before    dateIsBefore     x000D   lt script src  https   cdnjs cloudflare com ajax libs moment js 2 22 0 moment min js  x000D   gt  lt  script gt  x000D   x000D   x000D

User · Answer

You should be able to compare them directly   var date   moment  2013-03-24   var now   moment     if  now  gt  date          date is past   else         date is future      x000D   x000D    document  ready function     x000D     x000D        compare   click function e    x000D     x000D      var date       date   val    x000D     x000D      var now   moment    x000D      var then   moment date   x000D     x000D      if  now  gt  then    x000D            result   text  Date is past    x000D        else   x000D            result   text  Date is future    x000D        x000D   x000D        x000D   x000D      x000D   lt script src  https   cdnjs cloudflare com ajax libs moment js 2 10 3 moment min js  gt  lt  script gt  x000D   lt script src  https   ajax googleapis com ajax libs jquery 2 1 0 jquery min js  gt  lt  script gt  x000D   x000D   x000D   x000D   lt input type  text  name  date  id  date  value  2014-12-18   placeholder  yyyy-mm-dd  gt  x000D   lt button class  compare  gt Compare date to current date lt  button gt  x000D   lt br gt  x000D   lt div class  result  gt  lt  div gt  x000D   x000D   x000D

User · Answer

pass date to moment like this it will compare and give result  if you dont want format remove it  moment Date1  format  YYYY-MM-DD    gt  moment Date2  format  YYYY-MM-DD

User · Answer

Jsfiddle   http   jsfiddle net guhokemk 1    function compare dateTimeA  dateTimeB        var momentA   moment dateTimeA  DD MM YYYY        var momentB   moment dateTimeB  DD MM YYYY        if  momentA  gt  momentB  return 1      else if  momentA  lt  momentB  return -1      else return 0     alert compare  11 07 2015    10 07 2015       The method returns 1  if  dateTimeA  is greater than dateTimeB  The method returns 0 if  dateTimeA  equals  dateTimeB  The method returns -1  if  dateTimeA  is less than  dateTimeB

User · Answer

var startDate   moment startDateVal   quot DD MM YYYY quot     Date format var endDate   moment endDateVal   quot DD MM YYYY quot     var isAfter   moment startDate  isAfter endDate    if  isAfter        window showErrorMessage  quot Error Message quot          elements endDate  focus        return false

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