How can I compare ISO dates in Javascript

Question

How can I compare ISO dates in Javascript. Hour and Minute does not give correct results.

        function ConvertDateNowToISODate() {    
        var currentDate = new Date().toISOString();
        currentDate = new Date(currentDate).getTime();
        return currentDate;       
    }   
    
    function ConvertToExpirationDateToISODate(expirationDate) {
    
        var newDate = new Date(expirationDate).toISOString();
        newDate = new Date(newDate).getTime();
        return newDate;
        
    }
    
    function isFromBiggerThanTo(dtmfrom) {
        var from= ConvertToExpirationDateToISODate(dtmfrom);
        var to = ConvertDateNowToISODate();
       
        if (from > to)
            return "blue";
        else if (to < from)
            return "red";
        else
            return "grey";
}

dtmInputs= input1=2022-08-09T12:42:02.953, input2= 2022-10-08T05:00:00, input3= 2022-08-11T13:42:47.993, input4= 2022-10-08T14:35:00

my codes never drop in the red part like this. my codes never drop in the red part like this

Why are you converting your dates to strings? They're much easier to deal with as Date instances. — Pointy, Aug 10 '22 at 14:38
The first function can be just `return Date.now()`. The second function can be `return Date.parse(expirationDate)`. The code after the first *return* statement is never reached so can be deleted. Please provide example values for *dtmfrom* that demonstrate the issue. — RobG, Aug 10 '22 at 20:45

score 1 · Accepted Answer · answered Aug 11 '22 at 05:45

1

from > to and to < from are both the same. Silly mistake!

Change the second condition as to > from.

answered Aug 11 '22 at 05:45

Teddy

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How can I compare ISO dates in Javascript

1 Answers1