Basic Redux functions

redux-basics.js

// define a reducer
const reducer = function(state, action) {
  if (action.type === 'INC') {
    return state + action.payload
  } else if (action.type === 'DEC') {
    return state - action.payload
  }
  return state
}

// create the store, pass it the reducer 
const store = createStore(reducer, 0)

// Subscribe to store changes
store.subscribe(() => {
  console.log('store changed', store.getState())
})

// Send actions
store.dispatch({
  type: 'INC',
  payload: 199
})

store.dispatch({
  type: 'DEC',
  payload: 575658
})

store.dispatch({
  type: 'INC',
  payload: 191027
})