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redux-persist

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redux-persist

persist and rehydrate redux stores

  • 6.0.0
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What is redux-persist?

redux-persist is a library that allows you to save the Redux store in persistent storage, such as local storage, session storage, or even custom storage engines. This helps in maintaining the state of the application across page reloads.

What are redux-persist's main functionalities?

Persisting Redux State

This feature allows you to persist the Redux state using a storage engine like local storage. The `persistReducer` function wraps your root reducer, and `persistStore` initializes the persistor.

const persistConfig = { key: 'root', storage }; const persistedReducer = persistReducer(persistConfig, rootReducer); const store = createStore(persistedReducer); const persistor = persistStore(store);

Rehydrating State

Rehydration is the process of loading the persisted state back into the Redux store when the application starts. This ensures that the state is restored to its previous state before the page was reloaded.

persistStore(store, null, () => { console.log('Rehydration complete'); });

Custom Storage Engines

You can use custom storage engines if the default local storage or session storage does not meet your requirements. This example shows how to create a noop storage engine for environments where local storage is not available.

import createWebStorage from 'redux-persist/lib/storage/createWebStorage'; const createNoopStorage = () => { return { getItem(_key) { return Promise.resolve(null); }, setItem(_key, value) { return Promise.resolve(value); }, removeItem(_key) { return Promise.resolve(); } }; }; const storage = typeof window !== 'undefined' ? createWebStorage('local') : createNoopStorage();

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Package last updated on 02 Sep 2019

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