5eafc1e92a
@lfades hope this works. I have updated the example to show differences between client/ssr/ssg initial state in redux. Let me know if something needs to be changed.
74 lines
1.6 KiB
JavaScript
74 lines
1.6 KiB
JavaScript
import { useMemo } from 'react'
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import { createStore, applyMiddleware } from 'redux'
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import { composeWithDevTools } from 'redux-devtools-extension'
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let store
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const initialState = {
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lastUpdate: 0,
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light: false,
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count: 0,
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}
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const reducer = (state = initialState, action) => {
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switch (action.type) {
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case 'TICK':
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return {
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...state,
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lastUpdate: action.lastUpdate,
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light: !!action.light,
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}
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case 'INCREMENT':
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return {
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...state,
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count: state.count + 1,
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}
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case 'DECREMENT':
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return {
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...state,
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count: state.count - 1,
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}
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case 'RESET':
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return {
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...state,
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count: initialState.count,
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}
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default:
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return state
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}
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}
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function initStore(preloadedState = initialState) {
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return createStore(
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reducer,
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preloadedState,
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composeWithDevTools(applyMiddleware())
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)
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}
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export const initializeStore = (preloadedState) => {
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let _store = store ?? initStore(preloadedState)
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// After navigating to a page with an initial Redux state, merge that state
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// with the current state in the store, and create a new store
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if (preloadedState && store) {
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_store = initStore({
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...store.getState(),
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...preloadedState,
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})
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// Reset the current store
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store = undefined
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}
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// For SSG and SSR always create a new store
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if (typeof window === 'undefined') return _store
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// Create the store once in the client
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if (!store) store = _store
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return _store
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}
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export function useStore(initialState) {
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const store = useMemo(() => initializeStore(initialState), [initialState])
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return store
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}
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