qortal-ui/qortal-ui-core/src/persistState.js

import { store } from './store.js'
import { saveStateToLocalStorage } from './localStorageHelpers.js'

const keys = [
    'config',
    'user'
]

const oldReducers = {}

const oldState = store.getState()
for (const key of keys) {
    oldReducers[key] = oldState[key]
}

store.subscribe(() => {
    const newState = store.getState()
    keys.forEach(key => {
        if (newState[key] !== oldState[key]) {
            saveStateToLocalStorage(key, store.getState()[key])
        }
    })
})