How to subtract the time elapsed since some date?

Question

JavaScript

Maybe there is some library for counting how many minutes, hours, days have passed since a certain date?

Or prompt the algorithm calculating it.

Answer 1

Learn to ask Google questions

Answer 2

timestamp know what it is? More precisely, unix time, and so - if you subtract the timestamps, and then translate the result into the desired format, then here is the algorithm.

Answer 3

let startDate = new Date(1945, 5, 9);
let timeFrom = new Date() - startDate;

and then divide:

timeFrom/1000                                // секунды
timeFrom/1000/60                           // минуты
timeFrom/1000/60/60                      // часы
timeFrom/1000/60/60/24                // дни
//   ... и так далее ...