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<CacheProvider />

Manages state, providing all context needed to use the hooks. Should be placed as high as possible in application tree as any usage of the hooks is only possible for components below the provider in the React tree.

import { CacheProvider } from '@data-client/react';
import ReactDOM from 'react-dom';

<App />


interface ProviderProps {
children: ReactNode;
managers?: Manager[];
initialState?: State<unknown>;
Controller?: typeof Controller;
| 'bottom-right'
| 'bottom-left'
| 'top-right'
| 'top-left'
| null;

initialState: State<unknown>

type State<T> = Readonly<{
entities: Readonly<{
[fetchKey: string]: { [pk: string]: T } | undefined;
results: Readonly<{
[url: string]: unknown | PK[] | PK | undefined;
meta: Readonly<{
[url: string]: { date: number; error?: Error; expiresAt: number };

Instead of starting with an empty cache, you can provide your own initial state. This can be useful for testing, or rehydrating the cache state when using server side rendering.

managers?: Manager[]

Default Production:

[new NetworkManager(), new SubscriptionManager(PollingSubscription)];

Default Development:

new DevToolsManager(),
new NetworkManager(),
new SubscriptionManager(PollingSubscription),

List of Managers use. This is the main extensibility point of the provider.

Controller: typeof Controller

This allows you to extend Controller to provide additional functionality. This might be useful if you have additional actions you want to dispatch to custom Managers

class MyController extends Controller {
doSomething = () => {

const RealApp = (
<CacheProvider Controller={MyController}>
<App />


In development, a small button will appear that gives easy access to browser devtools if installed. This option configures where it shows up, or if null will disable it altogether.

'bottom-right' | 'bottom-left' | 'top-right'| 'top-left' | null

Disable button
<CacheProvider devButton={null}>
Place in top right corner
<CacheProvider devButton="top-right">


import { defaultState, Controller } from '@data-client/core';

CacheProvider.defaultProps = {
initialState: defaultState as State<unknown>,
devButton: 'bottom-right',