Sometimes, we want to define a regex-matched string type in TypeScript.
In this article, we’ll look at how to define a regex-matched string type in TypeScript.
How to define a regex-matched string type in TypeScript?
To define a regex-matched string type in TypeScript, we can create a literal type that matches the pattern of a given string.
For instance, we write
type MarkerTime = `${number | ""}${number}:${number}${number}`;
const t: MarkerTime = "09:00";
to create the MarkerTime type which is type that matches a string with 1 to 2 numbers before the colon and 2 numbers after.
Therefore, we can create a MarkTime variable t with value "09:00" and the TypeScript compiler will accept it.
Conclusion
To define a regex-matched string type in TypeScript, we can create a literal type that matches the pattern of a given string.
