如何比较时刻js中的日期时间

Question

Hi I need to validate two date time moment instances, Using this Package to get time we can select hour min sec in this. I need validate if selected Date time is after or before like you see in code.I'm having confusion will it validate date with time? How to compare selected date time hour min sec in isAfter/isBefore

 function DateValidate(selectedDate,type){ //selected date in moment instance
      let isValid=false
      const {startTime,endTime}=dateTime // from state 
       if(type==='start'&& endTime){
            isValid=selectedDate.isAfter(endTime);
          }else if(type==='end'&& startTime){
          isValid=selectedDate.isBefore(startTime);
          }
       return isValid
      }

should i need to format selected date needed format -(dd/mm/yyyy hh:mm:ss) and then apply isBefore/isafter? Please help...

Answer 1

Yes it will validate date along with the time. Here is the code which shows the 1 second difference between two dates.

const out = document.getElementById('output');

const today = moment();
var afterToday;
setTimeout(()=>{
    afterToday = moment();
}, 1000)

setTimeout(()=>{

    //const diff = afterToday.isAfter(today);
  const diff = today.isAfter(afterToday);
  out.innerText = diff;
}, 2000)

To see it in action take a look here .

Answer 2

It looks like, in your example, the selectedDate is not a valid moment object. selectedDate needs to be a valid moment object in order to successfully apply the isAfter() and isBefore() methods, and startTime and endTime must also be in the correct format. See the examples in the docs: https://momentjs.com/docs/#/query/is-after/ .

If you know the format ahead of time, you can pass that as the second argument into moment(). See the relevant part of the docs: momentjs.com/docs/#/parsing/string-format. In your example, something like moment("10/09/1997 02:31:01", "dd/mm/yyyy hh:mm:ss")