我正在使用React-Redux设置应用程序并配置商店,类似于here所示的指南
这是我的代码:
import { applyMiddleware, compose, createStore } from 'redux';
import thunkMiddleware from 'redux-thunk';
import rootReducer from '../reducers/reducers'
export default function configureStore() {
const middlewares = [thunkMiddleware];
const middlewareEnhancer = applyMiddleware(...middlewares);
const enhancers = [middlewareEnhancer];
const composedEnhancers = compose(...enhancers);
const preloadedState = (<any>window).__PRELOADED_STATE__;
delete (<any>window).__PRELOADED_STATE__;
const store = createStore(rootReducer, preloadedState, composedEnhancers);
return store;
}
但是,当我运行build时,我一直收到以下的Typescript错误
TS2345: Argument of type '(...args: any[]) => {}' is not assignable to parameter of type 'StoreEnhancer<{}, {}>'.
我糊涂了。 Redux的声明文件状态(如下所示)不是StoreEnhancer只是将Store和State扩展作为空的普通对象接收吗?
export type StoreEnhancer<Ext = {}, StateExt = {}> = (next: StoreEnhancerStoreCreator) => StoreEnhancerStoreCreator<Ext, StateExt>
如果是这样,为什么不接受其余参数中的'Any'类型,即使我在配置文件中将“noImplicitAny”属性设置为“true”,如下所示?
(据我所知,休息参数无论如何都不能接收声明的类型。)
我错过了什么? 另外,我使用以下软件包版本:
“反应”:“^ 16.4.2”, “redux”:“^ 4.0.0”, “redux-thunk”:“^ 2.3.0”, “webpack”:“^ 4.16.5”, “awesome-typescript-loader”:“^ 5.2.0”, “typescript”:“^ 3.0.3” “@ types / react”:“^ 16.4.12”, “@ types / redux”:“^ 3.6.0”, “@ types / redux-thunk”:“^ 2.1.0”
使用以下TS配置设置:
“compilerOptions”:{ *“outDir”:“。/ dist /”, *“sourceMap”:是的, *“noImplicitAny”:是的, *“模块”:“esnext”, *“目标”:“esnext”, *“jsx”:“反应”, *“moduleResolution”:“node”, *“noUnusedLocals”:是的, *“noUnusedParameters”:是的, *“严格”:是的, *“esModuleInterop”:false, *“noFallthroughCasesInSwitch”:是的, *“allowSyntheticDefaultImports”:true }
问题是composedEnhancers
的返回类型是{}
,而createStore
期望它是StoreEnhancerStoreCreator<{}, {}>
。返回类型的{}
来自你对compose
的调用,它与type declarations中的这个重载相匹配,因为你正在传播一系列增强子:
export function compose<R>(...funcs: Function[]): (...args: any[]) => R;
如果您未指定R
,则默认为{}
。所以要么指定R
,要么只使用compose(middlewareEnhancer)
,除非你真的需要一个动态的增强器数组。