Method fetchOptimistic

packages/query-core/src/queryObserver.ts:305–321

(
    options: QueryObserverOptions<
      TQueryFnData,
      TError,
      TData,
      TQueryData,
      TQueryKey
    >,
  )

  }

  fetchOptimistic(
    options: QueryObserverOptions<
      TQueryFnData,
      TError,
      TData,
      TQueryData,
      TQueryKey
    >,
  ): Promise<QueryObserverResult<TData, TError>> {
    const defaultedOptions = this.#client.defaultQueryOptions(options)

    const query = this.#client
      .getQueryCache()
      .build(this.#client, defaultedOptions)

    return query.fetch().then(() => this.createResult(query, defaultedOptions))
  }

  protected fetch(
    fetchOptions: ObserverFetchOptions,