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types: improve useParent typing

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This commit is contained in:
chenjiahan 2020-09-21 18:38:33 +08:00
parent 7d0340a35b
commit 5359120ed3
1 changed files with 5 additions and 5 deletions
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10
src/composition/use-relation.ts
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@ -1,11 +1,11 @@
import { inject, computed, onUnmounted } from 'vue'; import { inject, computed, onUnmounted } from 'vue';
export type Parent<T = unknown> = null | { type Parent = { children: unknown[] };
children: T[];
};
export function useParent<T = unknown>(key: string, child: T = {} as T) { type Child<T> = T extends { children: (infer U)[] } ? U : never;
const parent = inject<Parent<T>>(key, null);
export function useParent<P extends Parent>(key: string, child: Child<P>) {
const parent = inject<P | null>(key, null);
if (parent) { if (parent) {
const { children } = parent; const { children } = parent;