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Tighten applyMiddleware types #3766

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merged 2 commits into from
Jul 14, 2020
Merged

Tighten applyMiddleware types #3766

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Tighten applyMiddleware types
Methuselah96 May 9, 2020
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Methuselah96 May 9, 2020
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13 changes: 9 additions & 4 deletions src/applyMiddleware.ts
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Original file line number Diff line number Diff line change
@@ -1,7 +1,12 @@
import compose from './compose'
import { Middleware, MiddlewareAPI } from './types/middleware'
import { AnyAction } from './types/actions'
import { StoreEnhancer, StoreCreator, Dispatch } from './types/store'
import {
StoreEnhancer,
Dispatch,
PreloadedState,
StoreEnhancerStoreCreator
} from './types/store'
import { Reducer } from './types/reducers'

/**
Expand Down Expand Up @@ -55,11 +60,11 @@ export default function applyMiddleware<Ext, S = any>(
export default function applyMiddleware(
...middlewares: Middleware[]
): StoreEnhancer<any> {
return (createStore: StoreCreator) => <S, A extends AnyAction>(
return (createStore: StoreEnhancerStoreCreator) => <S, A extends AnyAction>(
reducer: Reducer<S, A>,
...args: any[]
preloadedState?: PreloadedState<S>
) => {
const store = createStore(reducer, ...args)
const store = createStore(reducer, preloadedState)
let dispatch: Dispatch = () => {
throw new Error(
'Dispatching while constructing your middleware is not allowed. ' +
Expand Down