How to add a day to a date in TypeScript

Question

I need to add 1 day to a date variable in TypeScript. May I know how can I add a day to a date field in TypeScript.

This is not a duplicate, please reopen. I need to specify a TypeScript answer. TypeScript has capabilities above and beyond JavaScript. — wonea, Apr 04 '17 at 10:01
Using DefinitelyTyped definition for DateJS https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/datejs/datejs-tests.ts // Add 1 days to Today Date.today().add(1).days(); — wonea, Apr 04 '17 at 10:01

Adam · Answer 1 · 2020-07-30T15:16:47.063

This is just regular JavaScript, no need for TypeScript.

yourDate = new Date(yourDate.getTime() + (1000 * 60 * 60 * 24));

1000 milliseconds in a second * 60 seconds in a minute * 60 minutes in an hour * 24 hours.

Additionally you could increment the date:

yourDate.setDate(yourDate.getDate() + 1);

The neat thing about setDate is that if your date is out-of-range for the month, it will still correctly update the date (January 32 -> February 1).

See more documentation on setDate on MDN.

score 30 · Answer 2 · edited Feb 12 '18 at 16:10

30

 addDays(date: Date, days: number): Date {
        date.setDate(date.getDate() + days);
        return date;
    }

In your case days = 1

edited Feb 12 '18 at 16:10

JustLearning

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answered Feb 15 '17 at 22:37

RK_Aus

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You might get 'date.getDate is not a function' when trying this. – Enrico Mar 22 '19 at 10:30
check whether the date variable is string, the error is because of that, if yes then first convert it to a date and then pass it to the above function – Tejashri Patange Aug 17 '20 at 23:29

How to add a day to a date in TypeScript

2 Answers2