[enhancement]: Type Safety in RTK Query Listener

[Millu]

Is there an existing issue for this?

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Contact Details

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What should this feature add?

When we use RTK Query in the listener middleware, we'd like to get type safety on actions.

This needs some TypeScript magic, thanks to RTK maintainer on discord:

`type TypeGuard = {
(input: unknown): input is T;
};

type TypeGuardFor<T extends TypeGuard> = T extends TypeGuard
? U
: never;

// in startAppListening
matcher: (
action
): action is TypeGuardFor<
typeof imagesApi.endpoints.listImages.matchFulfilled
> =>
imagesApi.endpoints.listImages.matchFulfilled(action) &&
action.meta.arg.queryCacheKey ===
getListImagesUrl({ categories: IMAGE_CATEGORIES }),`

Alternatives

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Aditional Content

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