TypeScript - add hours to date

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

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

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

Practical example:

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const addHours = (date: Date, hours: number): Date => {

  const result = new Date(date);

  result.setHours(result.getHours() + hours);

  return result;

};

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// Usage example:

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const date: Date = new Date('2021-08-30T23:00:00.000Z');

​

console.log(addHours(date, 2).toISOString()); // 2021-08-31T01:00:00.000Z

Output:

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2021-08-31T01:00:00.000Z

Note:

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