Omit keyof any

[fudom]

🔎 Search Terms

Omit

🕗 Version & Regression Information

typescript ~5.5

💻 Code

options?: Omit<PopoverOptions, 'component' | 'componentProps' | 'event'> = {}
// But freestyle, because `any` type.

🙁 Actual behavior

type Pick<T, K extends keyof T> = { [P in K]: T[P]; };
type Omit<T, K extends keyof any> = Pick<T, Exclude<keyof T, K>>;

Why keyof any and not key of T like in Pick?

🙂 Expected behavior

type Pick<T, K extends keyof T> = { [P in K]: T[P]; };
type Omit<T, K extends keyof T> = Pick<T, Exclude<keyof T, K>>;

Why not using keyof T like in Pick? I mean, what type of keys should be omitted if not from passed object? Any reason for this?

Workaround (might work, not tested):

type StrictOmit<T, K extends keyof T> = Omit<T, K>;

Or invert by WeakOmit<T, K extends keyof any> if Omit<T, K extends keyof T>.

[MartinJohns]

Duplicate of #30825.