combineReducers 返回类型被推断为任何类型

Question

I am using typescript on JSDocs and I am having a bad time typing the root state of my application. Following redux documentation about how to use it with typescript, I try to use the return type of my root reducer as the root state state but it infers to be any. I'm not sure if this is just a bug on my redux version or what. Here is my code snippet:

import { combineReducers } from 'redux';
import { routerReducer } from 'react-router-redux';

const homeReducer = (state: {cool: boolean}) => state

const reducerMap = {
  router: routerReducer,
  home: homeReducer,
};

/** @typedef {ReturnType<typeof rootReducer>} RootState*/

const rootReducer = combineReducers(reducerMap);
export default rootReducer;

The type I'm getting out of this is type RootState = any . My redux version is 3.7.2

typescript playground

Answer 1

So, looks that redux version 3.7.2 doesn't include proper types. Hopefully it was easy to upgrade it to 4.0.5 and now the types I posted are correct. If anyone is interested in taking a look on the upgrade changes are on this PR: merge request