ugliy-location-reducer.js

export function prevLocation(state = {
  refDomNode: null,
  method: null
}, action) {
  switch (action.type) {
    case LOCATION_CHANGE:
      const method = action.payload.action
      return Object.assign({},state,{
        method: method
      })
    case SET_PREVDOM:
      const refdomObj = Object.assign({}, state.refDomNode, action.refDomNode)
      return Object.assign({},state,{refDomNode:refdomObj})
    default:
      return state
  }
}