Add an string to each tuple

Question

I have an type

type mytype = 'tipe-1' | 'tipe-2' | 'tipe-3'

how to type like this type mytype2 = '1' | '2' | '3'

but the output still the same 'tipe-1' | 'tipe-2' | 'tipe-3'

If you want to generate more numbers, check this answer https://stackoverflow.com/questions/65307438/how-to-define-properties-in-a-typescript-interface-with-dynamic-elements-in-the — captain-yossarian from Ukraine, Dec 30 '20 at 11:31

score 3 · Accepted Answer · answered Dec 30 '20 at 08:34

3

type MyType = `tipe-${1 | 2 | 3}`

This is identical to:

type MyType = 'tipe-1' | 'tipe-2' | 'tipe-3'

You can abstract this if you'd like to use it in multiple places:

type MakeMyType<T extends number> = `tipe-${T}`;

type MyType = MakeMyType<1 | 2 | 3>;

answered Dec 30 '20 at 08:34

Dogbert

Thanks for the answer, this is what i need – Bambang Adhitya Permana Dec 31 '20 at 18:52

1 Answers1