How can I compare two time strings in the format HH MM SS

Question

I have two time strings in HH MM SS format  For example  str1 contains 10 20 45   str2 contains 5 10 10   How can I compare the above values

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Convert to seconds those strings   var str1    10 20 45   var str2    5 10 10    str1    str1 split       str2    str2 split        totalSeconds1   parseInt str1 0    3600   str1 1    60   str1 0    totalSeconds2   parseInt str2 0    3600   str2 1    60   str2 0        compare them  if  totalSeconds1  gt  totalSeconds2        etc

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var startTime   getTime document getElementById  startTime   value                   var endTime   getTime document getElementById  endTime   value                     var sts   startTime split                       var ets   endTime split                        var stMin    parseInt sts 0     60   parseInt sts 1                     var etMin    parseInt ets 0     60   parseInt ets 1                     if  etMin  gt  stMin                       do your stuff

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You could compare the two values right after splitting them with

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Best way to compare times using convert into ms   var minutesOfDay   function m         return m minutes     m hours     60         return minutesOfDay now   gt  minutesOfDay end

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I think you can put it like this    x000D   x000D  var a    10 20 45   x000D  var b    5 10 10   x000D   x000D  var timeA   new Date    x000D  timeA setHours a split      0  a split      1  a split      2    x000D  timeB   new Date    x000D  timeB setHours b split      0  b split      1  b split      2    x000D   x000D  var x   B is later than A   x000D  if timeA gt timeB  x    A is later than B   x000D  document getElementById  demo   innerHTML   x  x000D   lt p id  demo  gt  lt  p gt  x000D   x000D   x000D

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I improved this function from  kamil-p solution  I ignored seconds compare   You can add seconds logic to this function by attention your using   Work only for  HH mm  time format   function compareTime str1  str2       if str1     str2           return 0            var time1   str1 split           var time2   str2 split           if eval time1 0    gt  eval time2 0             return 1        else if eval time1 0      eval time2 0    amp  amp  eval time1 1    gt  eval time2 1              return 1        else           return -1            example  alert compareTime  8 30   11 20       Thanks to  kamil-p

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Date parse  01 01 2011 10 20 45    gt  Date parse  01 01 2011 5 10 10    gt  true   The 1st January is an arbitrary date  doesn t mean anything

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You can easily do it with below code   Note  The second argument in RegExp is  g  which is the global search flag  The global search flag makes the RegExp search for a pattern throughout the string  creating an array of all occurrences it can find matching the given pattern  Below code only works if the time is in HH MM SS format i e  24 hour time format   var regex   new RegExp       g        timeStr1    5 50 55       timeStr2    6 17 05   if parseInt timeStr1 replace regex       10   lt  parseInt timeStr2 replace regex       10      console log  timeStr1 is smaller then timeStr2      else     console log  timeStr2 is smaller then timeStr1

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Try this code for the 24 hrs format of time    lt script type  text javascript  gt  var a  12 23 35   var b  15 32 12   var aa1 a split       var aa2 b split        var d1 new Date parseInt  2001  10   parseInt  01  10  -1 parseInt  01  10  parseInt aa1 0  10  parseInt aa1 1  10  parseInt aa1 2  10    var d2 new Date parseInt  2001  10   parseInt  01  10  -1 parseInt  01  10  parseInt aa2 0  10  parseInt aa2 1  10  parseInt aa2 2  10    var dd1 d1 valueOf    var dd2 d2 valueOf     if dd1 lt dd2   alert  b is greater     else alert  a is greater       lt  script gt

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Set the extracted part of the time to variables       If you don t have the second part then set it to 00      Create date object and set the time to that  var startTimeObject   new Date     startTimeObject setHours startHour  startMinute  startSecond       Create date object and set the time to that  var endTimeObject   new Date startTimeObject    endTimeObject setHours endHour  endMinute  endSecond       Now we are ready to compare both the dates  if startTimeObject  gt  endTimeObject         alert  End time should be after start time         else        alert  Entries are perfect

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As Felix Kling said in the comments  provided your times are based on a 24 hour clock  and they should be if there s no AM PM  and provided they are always in the format HH MM SS you can do a direct string comparison   var str1    10 20 45       str2    05 10 10    if  str1  gt  str2      alert  Time 1 is later than time 2    else     alert  Time 2 is later than time 1

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I m not so comfortable with regular expressions  and my example results from a datetimepicker field formatted m d Y h mA   In this legal example  you have to arrive before the actual deposition hearing   I use replace function to clean up the dates so that I can process them as Date objects and compare them   function compareDateTimes           date format ex  04 20 2017 01 30PM        the problem is that this format results in Invalid Date       var d0   new Date  04 20 2017 01 30PM      gt  Invalid Date      var start date       letter  depo arrival time   val        var end date       letter  depo dateandtime   val         if  start date        end date                return              break it up for processing     var d1   stringToDate start date       var d2   stringToDate end date        var diff   d2 getTime   - d1 getTime        if  diff  lt  0            end date   moment d2  format  MM DD YYYY hh mA                letter  depo arrival time   val end date            function stringToDate the date        var arrDate   the date split           var the date   arrDate 0       var the time   arrDate 1       var arrTime   the time split           var blnPM    arrTime 1  indexOf  PM    gt  -1         first fix the hour     if  blnPM            if  arrTime 0  indexOf  0    0                var clean hour   arrTime 0  substr 1 1               arrTime 0    Number clean hour    12                    arrTime 1    arrTime 1  replace  PM     00          else           arrTime 1    arrTime 1  replace  AM     00              var date object    new Date the date         now replace the time     date object   String date object  replace  00 00 00   arrTime join            date object    new Date date object        return date object

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var str1    150 05 05   var str2    80 04 59       function compareTime str1  str2        if str1     str2           return 0             var time1   str1 split           var time2   str2 split            for  var i   0  i  lt  time1 length  i              if time1 i   gt  time2 i                return 1            else if time1 i   lt  time2 i                 return -1

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Try this code   var startTime    05 01 20   var endTime    09 00 00   var regExp      d 1 2      d 1 2      d 1 2     if parseInt endTime  replace regExp    1 2 3     gt  parseInt startTime  replace regExp    1 2 3      alert  End time is greater

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Date object in js support comparison  set them same date for compare hh mm ss    new Date   1 1 1999      10 20 45    gt  new Date   1 1 1999      5 10 10     gt  true

[javascript] How can I compare two time strings in the format HH:MM:SS?

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