TypeScript - subtract seconds from date

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

Quick solution:

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

date.setSeconds(date.getSeconds() - 2); // subtracted 2 seconds from existing date

console.log(date.toISOString()); // 2021-06-29T23:59:58.000Z

Example reusable lambda function

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

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

Runnable example:

const subtractSeconds = (date: Date, seconds: number): Date => {
  const result = new Date(date);
  result.setSeconds(result.getSeconds() - seconds);
  return result;
};

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

console.log(subtractSeconds(date, 1).toISOString());

Output:

2021-06-29T23:59:59.000Z

Note:

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