Omit should distribute over union types

[askvortsov1]

Bug Report

🔎 Search Terms

omit union

🕗 Version & Regression Information

• This is the behavior in every version I tried since 3.5 where Omit was introduced, and I reviewed the FAQ for entries about omit

⏯ Playground Link

Playground Link

💻 Code

type A = {
    shared: string;

    something: true;

    exclusiveToA: string;
}

type B = {
    shared: string;

    something: false;

    exclusiveToB: string;
}

type C = A | B;

type D = Omit<C, 'shared'>;

const a: D = {
    something: true,
    exclusiveToA: 'here',
}

const b: D = {
    something: false,
    exclusiveToB: 'here',
}

🙁 Actual behavior

Omit strips away properties of its union type operands that don't have common keys

🙂 Expected behavior

Omit should recursively distribute over union/product type expressions

[MartinJohns]

Duplicate of #46361. Used search terms: omit union (same as you)

[askvortsov1]

Duplicate of #46361. Used search terms: omit union (same as you)

Huh, not sure how I missed that... Thanks!

[MartinJohns]

Probably just looked at the open issues? :-D If you add in:title you will find a lot more duplicates, with less noise.