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store.js
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store.js
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import { createStore, applyMiddleware } from 'redux';
import { composeWithDevTools } from 'redux-devtools-extension';
import thunk from 'redux-thunk';
import rootReducer from './reducers';
import setAuthToken from './utils/setAuthToken';
const initialState = {};
const middleware = [thunk];
const store = createStore(
rootReducer,
initialState,
composeWithDevTools(applyMiddleware(...middleware))
);
/*
NOTE: set up a store subscription listener
to store the users token in localStorage
*/
/*
initialize current state from redux store for subscription comparison
preventing undefined error
*/
let currentState = store.getState();
store.subscribe(() => {
// keep track of the previous and current state to compare changes
let previousState = currentState;
currentState = store.getState();
// if the token changes set the value in localStorage and axios headers
if (previousState.auth.token !== currentState.auth.token) {
const token = currentState.auth.token;
setAuthToken(token);
}
});
export default store;