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- import { ADD, MINUS } from '../constants/counter'
- const INITIAL_STATE = {
- num: 0
- }
- export default function counter (state = INITIAL_STATE, action) {
- switch (action.type) {
- case ADD:
- return {
- ...state,
- num: state.num + 1
- }
- case MINUS:
- return {
- ...state,
- num: state.num - 1
- }
- default:
- return state
- }
- }
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