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next.js/examples/with-redux/store.js

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import { createStore, applyMiddleware } from 'redux'
import thunkMiddleware from 'redux-thunk'
export const reducer = (state = { lastUpdate: 0, light: false }, action) => {
switch (action.type) {
case 'TICK': return { lastUpdate: action.ts, light: !!action.light }
default: return state
}
}
export const startClock = () => dispatch => {
return setInterval(() => dispatch({ type: 'TICK', light: true, ts: Date.now() }), 800)
}
export const initStore = (reducer, initialState, isServer) => {
if (isServer && typeof window === 'undefined') {
return createStore(reducer, initialState, applyMiddleware(thunkMiddleware))
} else {
if (!window.store) {
window.store = createStore(reducer, initialState, applyMiddleware(thunkMiddleware))
}
return window.store
}
}