How do I declare a string that is of a specific length using typescript?

Issue

For example a string that can only be two characters long, which could be used for an ISO country code.

I have used Google and looked through the documentation but cannot find the answer.

Solution

There isn't a way to specify a string length as a type.

If you have a finite list of country codes, you could write a string literal type:

type CountryCode = 'US' | 'CN' | 'CA' | ...(lots of others);

Answered By - Ryan Cavanaugh