Get time difference between two dates in seconds

Question

I m trying to get a difference between two dates in seconds  The logic would be like this     set an initial date which would be now  set a final date which would be the initial date plus some amount of seconds in future   let s say 15 for instance   get the difference between those two   the amount of seconds     The reason why I m doing it it with dates it s because the final date   time depends on some other variables and it s never the same   it depends on how fast a user does something   and I also store the initial date for other things   I ve been trying something like this     var  initial   new Date         initial    initial setDate  initial getDate          final   new Date  initial        final    final setDate  final getDate     15   1000   60    var dif   Math round   final -  initial     1000   60      The thing is that I never get the right difference  I tried dividing by 24   60 which would leave me with the seconds  but I never get it right  So what is it wrong with my logic   I might be making some stupid mistake as it s quite late  but it bothers me that I cannot get it to work

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time difference between now and 10 minutes later using momentjs  let start time   moment   format  YYYY-MM-DD HH mm ss    let next time   moment   add 10   m   format  YYYY-MM-DD HH mm ss     let diff milliseconds   Date parse next time  - Date parse star time   let diff seconds   diff milliseconds   1000

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The Code var startDate   new Date       Do your operations var endDate     new Date    var seconds    endDate getTime   - startDate getTime      1000   Or even simpler  endDate - startDate    1000 as pointed out in the comments unless you re using typescript   The explanation You need to call the getTime   method for the Date objects  and then simply subtract them and divide by 1000  since it s originally in milliseconds   As an extra  when you re calling the getDate   method  you re in fact getting the day of the month as an integer between 1 and 31  not zero based  as opposed to the epoch time you d get from calling the getTime   method  representing the number of milliseconds since January 1st 1970  00 00  Rant Depending on what your date related operations are  you might want to invest in integrating a library such as date js or moment js which make things so much easier for the developer  but that s just a matter of personal preference  For example in moment js we would do moment1 diff moment2   quot seconds quot   which is beautiful   Useful docs for this answer  Why 1970  Date object Date s getTime method Date s getDate method Need more accuracy than just seconds

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try using dedicated functions from high level programming languages  JavaScript  getSeconds    suits here   var specifiedTime   new Date  November 02  2017 06 00 00    var specifiedTimeSeconds   specifiedTime getSeconds      var currentTime   new Date    var currentTimeSeconds   currentTime getSeconds      alert specifiedTimeSeconds-currentTimeSeconds

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lt script type  text javascript  gt  var  initial    2015-05-21T10 17 28 593Z   var fromTime   new Date  initial   var toTime   new Date     var differenceTravel   toTime getTime   - fromTime getTime    var seconds   Math floor  differenceTravel     1000    document write    seconds       lt  script gt

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You can use new Date   getTime   for getting timestamps  Then you can calculate the difference between end and start and finally transform the timestamp which is ms into s   const start   new Date   getTime    const end   new Date   getTime     const diff   end - start  const seconds   Math floor diff   1000   60

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Below code will give the time difference in second    var date1   new Date       current date var date2   new Date  06 26 2018       mm dd yyyy format var timeDiff   Math abs date2 getTime   - date1 getTime        in miliseconds var timeDiffInSecond   Math ceil timeDiff   1000      in second  alert timeDiffInSecond

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Define two dates using new Date    Calculate the time difference of two dates using date2  getTime       date1  getTime    Calculate the no  of days between two dates  divide the time difference of both the dates by no  of milliseconds in a day  10006060 24

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Accurate and fast will give output in seconds   let startDate   new Date    let endDate   new Date  quot yyyy-MM-dd T HH mm ssZ quot     let seconds   Math round  endDate getTime   - startDate getTime      1000

[javascript] Get time difference between two dates in seconds

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