Function resolveInject

src/apis/inject.ts:14–27

(
  provideKey: InjectionKey<any> | string,
  vm: ComponentInstance
)

export interface InjectionKey<T> extends Symbol {}

function resolveInject(
  provideKey: InjectionKey<any> | string,
  vm: ComponentInstance
): any {
  let source = vm
  while (source) {
    if (source._provided && hasOwn(source._provided, provideKey as PropertyKey)) {
      return source._provided[provideKey as PropertyKey]
    }
    source = source.$parent
  }

  return NOT_FOUND
}

export function provide<T>(key: InjectionKey<T> | string, value: T): void {
  const vm = getCurrentInstanceForFn('provide')?.proxy