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Enhance route.lazy return type #10634

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merged 2 commits into from
Jun 30, 2023
Merged

Enhance route.lazy return type #10634

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6b0e110
Enahnce route.lazy return type
brophdawg11 Jun 23, 2023
5a4df4c
Fix upstream type in RR
brophdawg11 Jun 23, 2023
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5 changes: 5 additions & 0 deletions .changeset/route-lazy-type.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
"@remix-run/router": patch
---

Enhance the return type of `Route.lazy` to prohibit returning an empty object
9 changes: 8 additions & 1 deletion packages/router/utils.ts
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Expand Up @@ -239,12 +239,19 @@ export const immutableRouteKeys = new Set<ImmutableRouteKey>([
"children",
]);

type RequireOne<T, Key = keyof T> = Exclude<
{
[K in keyof T]: K extends Key ? Omit<T, K> & Required<Pick<T, K>> : never;
}[keyof T],
undefined
>;

/**
* lazy() function to load a route definition, which can add non-matching
* related properties to a route
*/
export interface LazyRouteFunction<R extends AgnosticRouteObject> {
(): Promise<Omit<R, ImmutableRouteKey>>;
(): Promise<RequireOne<Omit<R, ImmutableRouteKey>>>;
}

/**
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