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JavaScript - subtract minutes from date

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Created by:
James-Z
367

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

Quick solution:

// ONLINE-RUNNER:browser;

const date = new Date('2021-06-30T00:00:00.000Z');

date.setMinutes(date.getMinutes() - 2); // subtracted 2 minutes from existing date

console.log(date.toISOString());        // 2021-06-29T23:58:00.000Z

 

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 minutes,
  • minutes¬†- number of minutes we want to subtract.

Runnable example:

// ONLINE-RUNNER:browser;

const subtractMinutes = (date, minutes) => {
  const result = new Date(date);
  result.setMinutes(result.getMinutes() - minutes);
  return result;
};

let date = new Date('2021-06-30T00:00:00.000Z');

console.log(subtractMinutes(date, 2).toISOString());

Output:

2021-06-29T23:58:00.000Z

Note:

As you can see, the function also handles the case of the day change.

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.subtractMinutes = function (minutes) {
  let date = new Date(this.valueOf());
  date.setMinutes(date.getMinutes() - minutes);
  return date;
};

let date = new Date('2021-06-30T00:00:00.000Z');

console.log(date.subtractMinutes(2).toISOString());

Output: 

2021-06-29T23:58:00.000Z

JavaScript - date & time - add to / subtract from

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