Function resource

packages/core/src/resource/resource.ts:67–85

(options: ResourceOptions<T, R>)

 */
export function resource<T, R>(options: ResourceOptions<T, R>): ResourceRef<T | undefined>;
export function resource<T, R>(options: ResourceOptions<T, R>): ResourceRef<T | undefined> {
  if (ngDevMode && !options?.injector) {
    assertInInjectionContext(resource);
  }

  const oldNameForParams = (
    options as ResourceOptions<T, R> & {request: ResourceOptions<T, R>['params']}
  ).request;
  const params = options.params ?? oldNameForParams ?? (() => null!);
  return new ResourceImpl<T | undefined, R>(
    params,
    getLoader(options),
    options.defaultValue,
    options.equal ? wrapEqualityFn(options.equal) : undefined,
    options.debugName,
    options.injector ?? inject(Injector),
    options.id as StateKey<T>,
  );
}

type ResourceInternalStatus = 'idle' | 'loading' | 'resolved' | 'local';