Method updateResult

packages/query-core/src/queryObserver.ts:644–700

()

  }

  updateResult(): void {
    const prevResult = this.#currentResult as
      | QueryObserverResult<TData, TError>
      | undefined

    const nextResult = this.createResult(this.#currentQuery, this.options)

    this.#currentResultState = this.#currentQuery.state
    this.#currentResultOptions = this.options

    if (this.#currentResultState.data !== undefined) {
      this.#lastQueryWithDefinedData = this.#currentQuery
    }

    // Only notify and update result if something has changed
    if (shallowEqualObjects(nextResult, prevResult)) {
      return
    }

    this.#currentResult = nextResult

    const shouldNotifyListeners = (): boolean => {
      if (!prevResult) {
        return true
      }

      const { notifyOnChangeProps } = this.options
      const notifyOnChangePropsValue =
        typeof notifyOnChangeProps === 'function'
          ? notifyOnChangeProps()
          : notifyOnChangeProps

      if (
        notifyOnChangePropsValue === 'all' ||
        (!notifyOnChangePropsValue && !this.#trackedProps.size)
      ) {
        return true
      }

      const includedProps = new Set(
        notifyOnChangePropsValue ?? this.#trackedProps,
      )

      if (this.options.throwOnError) {
        includedProps.add('error')
      }

      return Object.keys(this.#currentResult).some((key) => {
        const typedKey = key as keyof QueryObserverResult
        const changed = this.#currentResult[typedKey] !== prevResult[typedKey]

        return changed && includedProps.has(typedKey)
      })
    }

    this.#notify({ listeners: shouldNotifyListeners() })
  }