CODEWITHSUNDEEP
javascriptdatecompare
Alwaysblue
Alwaysblue

Reputation: 11830

compare date and time in JS

I am authenticating user using oAuth2 which gives me expiry token.

The expiry token is for 3600 (which means one hour, as per oauth standard)

Now, when the token expire, I want to use refresh token to get new access token.

To see if the token have expired, I am thinking about storing the value of current Date.now() and the value of Date.now() after one hour.

THe problem is that date.now() gives value in long int i.e 

let date = Date.now() 
console.log(date)

Now, I am unable to comprehend how I can compare time here. Can somenone help me.

Upvotes: 3

Views: 1717

Answers (4)

RobG
RobG

Reputation: 147343

Since Date.now returns a time value and there are always exactly 3.6e6 ms in an ECMAScript hour, you can just add 3.6e6 to get the time value in one hour, e.g.

var now = Date.now();
var expires = now + 3.6e6;

console.log(`expired yet? ${now > expires}`);
console.log(`now    : ${new Date(now).toLocaleString()}\nexpires: ${new Date(expires).toLocaleString()}`);

Upvotes: 1

codingKID
codingKID

Reputation: 33

var time=new Date()
var now=String(time.getHours())+":"+String(time.getMinutes())+":"+String(time.getSeconds());

This will give you the time in H:M:S. Format and this will be string.

Upvotes: 0

Ferdinando
Ferdinando

Reputation: 964

Here an example where compare the date:

Date.prototype.addHours= function(h){ //simulation after 1 hour
    this.setHours(this.getHours()+h);
    return this;
}

var dateOld = new Date();
var dateNow = new Date().addHours(1);//test after 1 hour

//output: false
console.log(dateOld.getTime() === dateNow.getTime());//compare the date

Hope this helps

Upvotes: 1

Aditya Shankar
Aditya Shankar

Reputation: 742

use new Date() intead of Date.now()

as per MDN

If no arguments are provided, the constructor creates a JavaScript Date object for the current date and time according to system settings for timezone offset.

then dates can be directly compared using the > and < operators

Upvotes: 2

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