Ways to create a generic implementation of "typeof obj[keyof typeof obj]"

Looking to define a new type containing all values from an object, with the following structure:

const MyBar = {
  Benchpress : 1,
  Squats : 2
} as const;

An attempt was made to create a type but encountered difficulties:

type EnumLike<T extends {}> = (obj: T) => typeof obj[keyof typeof obj];

The desired outcome is something akin to this:

type BarKeys = EnumLike(MyBar); // BarKeys 1|2

Questioning whether this goal is achievable?

Answer №1

Instead of using type as a function, consider utilizing the type below which retrieves all values from an object. Also, ensure that you set object as the constraint, not {}. More information can be found here:

type ValueOf<T extends object> = T[keyof T];

To test:

type BarKeys = ValueOf<typeof MyBar>; //  1 | 2

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