typescript - How do I add functions to my custom types?

Question

I am using io-ts to check types.

export type UserType = t.TypeOf<typeof User>

how do i add a function to that type so i can do stuff like

const user : UserType {...}
user.getName()

question from:https://stackoverflow.com/questions/65930123/how-do-i-add-functions-to-my-custom-types

Answer 1

Waitting for answers