compare date and time in JS

Question

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.

Aditya Shankar · Accepted Answer · 2019-01-12 07:23:53Z

2

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

answered Jan 12, 2019 at 7:23

Aditya Shankar

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Comments

RobG · Accepted Answer · 2019-01-14 06:50:37Z

1

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()}`);

answered Jan 14, 2019 at 6:50

RobG

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Comments

Ferdinando · Accepted Answer · 2019-01-12 09:01:06Z

1

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

answered Jan 12, 2019 at 9:01

Ferdinando

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Comments

mridula · Accepted Answer · 2019-01-12 10:03:43Z

0

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.

edited Jan 12, 2019 at 10:03

mridula

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answered Jan 12, 2019 at 7:30

codingKID

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