How to subtract 3 days from today's date and compare with the conditional date, and if there are 3 days left before the conditional date, then issue a message?

Question

JavaScript

How to subtract 3 days from today's date and compare with the conditional date, and if there are 3 days left before the conditional date, then issue a message?
Maybe I asked a stupid question.
Here is a case:
there is a conditional date in the following format 2019-11-14T09:07:02.376+00:00
you need to make a function that will see that today there are 3 days left before the conditional date and issue a message if it is

Answer 1

If it suits "less than three days left", then:

(new Date('2019-11-14T09:07:02.376+00:00') - new Date()) < 3 * 24 * 60 * 60 * 1000