Method constructor

packages/query-core/src/queryClient.ts:69–76

(config: QueryClientConfig = {})

  #unsubscribeOnline?: () => void

  constructor(config: QueryClientConfig = {}) {
    this.#queryCache = config.queryCache || new QueryCache()
    this.#mutationCache = config.mutationCache || new MutationCache()
    this.#defaultOptions = config.defaultOptions || {}
    this.#queryDefaults = new Map()
    this.#mutationDefaults = new Map()
    this.#mountCount = 0
  }

  mount(): void {
    this.#mountCount++