Redux商店没有有效的reducer，带有combineReducers和有效的reducer

Question

import { createStore, combineReducers } from 'redux'
const reducer = (state = {}, action) => state
const rootReducer = combineReducers(reducer)
let store = createStore(rootReducer)
export default store

创建商店时会触发警告：

Store does not have a valid reducer. Make sure the argument passed to combineReducers is an object whose values are reducers.

当我尝试使用任何商店方法时，会再次出现此警告。

Answer 1

错误很简单 - 您没有将对象传递给combineReducers：

const rootReducer = combineReducers({ reducer })

这将解决问题。