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'Omit' should alias a distinct mapped type (for display purposes)

See original GitHub issue

Today, Omit will expand to Pick<Exclude<...>, ...> in quick info, error messages, etc. which is gross.

By defining Omit as its own conditional type, we can get a slightly nicer display, though it will introduce duplication of code between the two helpers.

Issue Analytics

State:
Created 4 years ago
Reactions:5
Comments:8 (8 by maintainers)

Top GitHub Comments

2reactions

DanielRosenwassercommented, Sep 21, 2020

The following type

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

now maintains modifiers thanks to @ahejlsberg’s pull request at #40633.

0reactions

ExE-Bosscommented, Sep 22, 2020

For TS 4.0 and older, you can use @Jack-Works’s https://github.com/type-challenges/type-challenges/issues/141.

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