dflzm/client/component/count/reducer.jsx

x

import {
  INCREASE,
  DECREASE,
} from './constant'

export default function count(number = 0, action) {
  switch (action.type) {
    case INCREASE:
      return number + action.amount
    case DECREASE:
      return number - action.amount
    default:
      return number
  }
}