TypeScript - add seconds to date

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

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

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

Practical example:

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const addSeconds = (date: Date, seconds: number): Date => {

    const result = new Date(date);

    result.setSeconds(seconds + result.getSeconds());

    return result;

};

​

​

// Usage example:

​

const date: Date = new Date('2021-08-30T23:59:59.000Z');

​

console.log(addSeconds(date, 2).toISOString()); // 2021-08-31T00:00:01.000Z

Output:

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2021-08-31T00:00:01.000Z

Note:

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

1. JavaScript - add seconds to date