Omit not providing intellisense on what can be omitted from type

[Daggron]

Acknowledgement

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Comment

Description

• When I am using Omit it takes two parameters

  1. The object type from which the keys are to be omitted
  2. The keys which we want to remove.

• Now when I try to do this I get no intellisense / autocompletion that hey these are the keys which are present in the Object type.

Reproduction

This can be reproduce in the this ts playground link

Screen shot for reference

Solution

type BetterOmit<T extends Record<any, any>, K extends keyof T> = {
    [P in T as P extends K ? never : P]: T[P]
}

All we need to do is add extends clause to the second Param which will give intellisense.

I can add this to the repo but need suggestion or reasoning behind the current implementation

[nmain]

See #30825, #54451, #53169

[RyanCavanaugh]

Omit isn't constrained on K (this is intentional), so there's no information to provide that hint from

[typescript-bot]

This issue has been marked as "Not a Defect" and has seen no recent activity. It has been automatically closed for house-keeping purposes.

[dnistreanu-diffco]

This should be a bug. Please reopen and fix it. It makes no sense to have no intelisense on Omit.

[RyanCavanaugh]

https://github.com/microsoft/TypeScript/wiki/FAQ#add-a-key-constraint-to-omit

https://github.com/microsoft/TypeScript/wiki/FAQ#this-is-closed-but-should-be-open-or-vice-versa