22 replies

Force every value of union type in an array

Let's say that I had the following union type:

type Name = "John" | "Sean" | "Theo";

type Name = "John" | "Sean" | "Theo";

If I wanted to have an array that accepted a list of those values I would do something like this

const names: Name[] = ["John", "Sean"];

const names: Name[] = ["John", "Sean"];

Is there a way to force an error if the array doesn't contain all the values?

Force every value of union type in an array - Theo's Typesafe Cult