Checking two Dates within a certain limit

Question

I have two dates, 1 being new Date(); and another Date in the same format, I would like to check if another Date is within 1 minute.

For example if I have the Date Sun Feb 25 2018 21:57:44 GMT+0000 (GMT Standard Time), anything between Sun Feb 25 2018 21:56:44 GMT+0000 (GMT Standard Time) and Sun Feb 25 2018 21:58:44 GMT+0000 (GMT Standard Time) would count as true.

I have tried to converting it to an ISOString and then slicing it down to the 2nd integer of the minutes and comparing them like so:

parseInt(new Date().toISOString().slice(0, 16).split(':')[1]);

but I think that's inefficient, and it doesn't consider the day/date/hour.

How would I go about doing this?

Have you considered using [Moment.js](http://momentjs.com/)? — Etheryte, Feb 25 '18 at 22:13
"*… two dates, 1 being new Date(); and another Date in the same format…*" is a non-sequteur. A Date object doesn't have a format. What you are really asking is how to parse a date string or timestamp. See [*Why does Date.parse give incorrect results?*](https://stackoverflow.com/questions/2587345/why-does-date-parse-give-incorrect-results) then simply subtract one date from the other to get the difference in milliseconds. — RobG, Feb 25 '18 at 22:15

Mik378 · Answer 1 · 2018-02-25T22:22:48.077

Something like this:

const f = (d1, d2) => {
 if(d1.getTime() > d2.getTime())
  return d1.getTime() - d2.getTime() <= 60000; 
 return d2.getTime() - d1.getTime() <= 60000;
}

console.log(f(new Date(2018,25,2,21,57,44), new Date(2018,25,2,21,58,44)))  //true
console.log(f(new Date(2018,25,2,21,57,44), new Date(2018,25,2,21,56,44)))  //true
console.log(f(new Date(2018,25,2,21,57,44), new Date(2018,25,2,21,56,43)))  //false

60000 is one minute converted to milliseconds.

Tim Novis · Accepted Answer · 2018-02-26T10:08:07.220

You could do something like this:

const compareDates = (a, b) => {
    const oneMinute = 1000 * 60;
    return a >= (b - oneMinute);
}

Use it like so:

const firstDate = new Date('2017-02-25T22:05:01.0Z');

const secondDate = new Date('2017-02-25T22:05:59.0Z');

const thirdDate = new Date('2017-02-25T22:06:59.0Z');

compareDates(firstDate, secondDate);
// true

compareDates(firstDate, thirdDate);
// false

Checking two Dates within a certain limit

2 Answers2