JavaScript - subtract milliseconds from date

0 points
Created by:

In this article, we would like to show you how to subtract milliseconds from date in JavaScript.

Quick solution:

// ONLINE-RUNNER:browser;

let date = new Date('2021-08-30T00:00:00.000Z');
date.setMilliseconds(date.getMilliseconds() - 5);

console.log(date.toISOString());  // 2021-08-29T23:59:59.995Z


1.  Example reusable lambda function

In this example, we create a simple function that takes two arguments:

  • date from which we want to subtract some milliseconds,
  • milliseconds - a number of milliseconds we want to subtract.

Runnable example:

// ONLINE-RUNNER:browser;

const subtractMilliseconds = (date, milliseconds) => {
  const result = new Date(date);
  result.setMilliseconds(result.getMilliseconds() - milliseconds);
  return result;

let date = new Date('2021-08-30T00:00:00.000Z');

console.log(subtractMilliseconds(date, 5).toISOString());  // 2021-08-29T23:59:59.995Z



2. Extending existing Date class with Date.prototype

In this example, we add a function to the Date.prototype so we can use it on any date object.

// ONLINE-RUNNER:browser;

Date.prototype.subtractMilliseconds = function (milliseconds) {
  let date = new Date(this.valueOf());
  date.setMilliseconds(date.getMilliseconds() - milliseconds);
  return date;

let date = new Date('2021-08-30T00:00:00.000Z');

console.log(date.subtractMilliseconds(5).toISOString());  // 2021-08-29T23:59:59.995Z


Donate to Dirask
Our content is created by volunteers - like Wikipedia. If you think, the things we do are good, donate us. Thanks!
Join to our subscribers to be up to date with content, news and offers.

Cross technology - subtract milliseconds from date

Native Advertising
Get your tech brand or product in front of software developers.
For more information Contact us
Dirask - we help you to
solve coding problems.
Ask question.

â€ïžđŸ’» 🙂