TypeScript 错误 - Redux 中间件属性 0答案

【问题标题】：TypeScript Error - Redux Middleware property 0TypeScript 错误 - Redux 中间件属性 0
【发布时间】：2021-06-12 09:38:08
【问题描述】：

设置中间件时出现以下错误。使用 Redux observable/Redux 工具包。关于为什么会发生这种情况的任何意见？

按照以下回购设置。 https://github.com/beast911/react-redux-observables-typescript

import systemReducer, {
  getInfoStart,
  getInfoSuccess,
  getInfoFailed,
  addInfoStart,
  addInfoSuccess,
  addInfoFailed,
  editInfoStart,
  editInfoSuccess,
  editInfoFailed,
  deleteInfoStart,
  deleteInfoSuccess,
  deleteInfoFailed,
  completeInfoStart,
  completeInfoSuccess,
  completeInfoFailed,
} from "./system/slice";

import {
  combineReducers,
  configureStore,
  getDefaultMiddleware,
} from "@reduxjs/toolkit";
import { createBrowserHistory } from "history";
import { combineEpics, createEpicMiddleware } from "redux-observable";
import {
  getInfoEpic,
  addInfoEpic,
  completeInfoEpic,
  deleteInfoEpic,
  editInfoEpic,
} from "./system/epics";
import { ActionType } from "typesafe-actions";
import {
  connectRouter,
  routerMiddleware,
  RouterState,
} from "connected-react-router";

type SystemActionsWithPayload =
  | typeof getInfoStart
  | typeof getInfoSuccess
  | typeof getInfoFailed
  | typeof addInfoStart
  | typeof addInfoSuccess
  | typeof addInfoFailed
  | typeof editInfoStart
  | typeof editInfoSuccess
  | typeof editInfoFailed
  | typeof deleteInfoStart
  | typeof deleteInfoSuccess
  | typeof deleteInfoFailed
  | typeof completeInfoStart
  | typeof completeInfoSuccess
  | typeof completeInfoFailed;

type SystemActions = ActionType<SystemActionsWithPayload>;

type finalActions = SystemActions;

const epics = combineEpics(
  getInfoEpic,
  addInfoEpic,
  completeInfoEpic,
  deleteInfoEpic,
  editInfoEpic
);

export const history = createBrowserHistory<RouterState>();
export const rootReducer = combineReducers({
  router: connectRouter(history),
  system: systemReducer,
});
export type RootState = ReturnType<typeof rootReducer>;
const epicMiddleware = createEpicMiddleware<
  finalActions, // input actions
  finalActions, // output actions
  RootState
>();

function configureAppStore(initialState?: any) {
  // configure middlewares
  const middlewares = [routerMiddleware(history), epicMiddleware];
  // create store
  return configureStore<RootState>({
    reducer: rootReducer,
    middleware: middlewares,
    preloadedState: initialState,
  });
}

export const store = configureAppStore();
epicMiddleware.run(epics);

类型 'Middleware[]' 不可分配给类型 '[ThunkMiddleware;系统：任务状态； }>，AnyAction，空> | ThunkMiddleware<...>] | ((getDefaultMiddleware: CurriedGetDefaultMiddleware<...>) => [...]) |不明确的'。 'Middleware[]' 类型中缺少属性'0'，但在'[ThunkMiddleware; 类型中是必需的；系统：任务状态； }>，AnyAction，空> | ThunkMiddleware<...>]'

【问题讨论】：

标签： typescript redux middleware redux-observable redux-toolkit

【解决方案1】：

不应使用手动指定的泛型调用大多数 Redux Toolkit api。

通过调用return configureStore<RootState>(...，您实际上会从您的商店中删除有关中间件的所有信息。跳过泛型，只需调用 return configureStore(... 并让 TypeScript 从用法中推断出正确的类型。

【讨论】：