Question 1

How to encrypt state with ngrx-store-localstorage?

Accepted Answer

Use the encrypt and decrypt functions in the keys configuration. For example, provide (state: string) => btoa(state) for basic encoding, but for security, integrate proper encryption libraries like CryptoJS.

Question 2

ngrx-store-localstorage vs manual localStorage handling in Angular?

Accepted Answer

This library automates syncing within the NgRx lifecycle, reducing boilerplate and ensuring consistency, whereas manual handling requires custom logic for save/load, state merging, and error handling.

Question 3

How to sync only specific properties in the state?

Accepted Answer

Configure the keys array with objects specifying filter properties. For instance, use { todos: ['name', 'status'] } to persist only those fields, as described in the partial sync documentation.

Question 4

Can ngrx-store-localstorage work with Angular Universal?

Accepted Answer

Yes, but you must set checkStorageAvailability to true and handle storage absence on the server, since localStorage isn't available in Node.js environments during SSR.

Question 5

What are the limits for state size in localStorage?

Accepted Answer

Browser storage typically caps at 5-10MB per origin. The library doesn't handle quota errors, so developers should monitor usage and implement fallbacks for large states.

Question 6

How to implement 'remember me' with this library?

Accepted Answer

Use the syncCondition function to check authentication state, e.g., syncCondition: (state) => state.auth.rememberMe, ensuring persistence only when the flag is true.

ngrx-store-localstorage

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