CODEWITHSUNDEEP
javascript
user3486427
user3486427

Reputation: 474

Compare date passed to new Date() with the date returned by new Date();

I'm trying to check if a date is valid. If I pass 31/02/2018 to new Date it will return Tue Mar 03 1987 00:00:00 GMT+0000 (GMT) as 31/02/2018 is not a real date. So how can I compare the passed date with the return date of new Date? or am I going about this the wrong way altogether. 

function isDateValid() {
    var dob = "31/02/1994",
        isValidDate = false;

    var reqs = dob.split("/"),
        day = reqs[0],
        month = reqs[1],
        year = reqs[2];

    var birthday = new Date(year + "-" + month + "-" + day);

    if (birthday === "????") {
        isValidDate = true;
    }

    return isValidDate;
}

Upvotes: 0

Views: 65

Answers (2)

Attersson
Attersson

Reputation: 4866

This is what you are looking for. I left your code unchanged and stuck to your original request.

function isDateValid() {
    var dob = "31/02/2018",
        isValidDate = false;

    var reqs = dob.split("/"),
        day = reqs[0],
        month = reqs[1],
        year = reqs[2];

    var birthday = new Date(year + "-" + month + "-" + day);
    
    if (+year  === birthday.getFullYear()&&
        +day   === birthday.getDate()    &&
        +month === birthday.getMonth() + 1) {
        isValidDate = true;
    }

    return isValidDate;
}

console.log(isDateValid());

Upvotes: 0

ssten
ssten

Reputation: 2049

You can get the last day of each month by doing this;

var lastDay = new Date(month, year, 0).getDate();

In your case;

function isDateValid(date){
    var isValidDate = false;

    var reqs = date.split("/"),
        day = reqs[0],
        month = reqs[1],
        year = reqs[2],
        lastDay = new Date(month, year, 0).getDate();

    if(day > 0 && day <= lastDay)
        isValidDate = true;

    return isValidDate;
}

Upvotes: 2

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