How can I coerce a TypeScript type based on an enum?-CodePudding

I have:

export const SupportedPrograms = [
  'program1',
  'program2',
  ...
] as const;

export type ProgramType = typeof SupportedPrograms[number];

And I have:

      const actionType: string = 'p1'
      const REDIRECT_MAP = {
        p1: 'program1',
        p2: 'program2'
      };
      const redirectType: ProgramType = REDIRECT_MAP[
        actionType
      ] as unknown as ProgramType;

So I want to convert the actionType, which is a string, to be redirectType, which needs to be of ProgramType.

But this Is giving me an error:

Element implicitly has an 'any' type because expression of type 'string' can't be used to index type '{ p1: string; p2: string; }'.

I thought the unknown would allow it, but no dice. Any tips would be appreciated.

Thanks!

CodePudding user response：

If you only need ProgramType in the end, you can use something like this:

type RedirectMap = { [key: string]: ProgramType };

const REDIRECT_MAP: RedirectMap = {
    p1: 'program1',
    p2: 'program2'
};