Mam store.js
plik
import { createStore, combineReducers } from "redux";
import reducerADD from "../reducer/reducerADD"
export const store = createStore(combineReducers({ reducerADD}));
Kiedy zmieniam format w store.tsx
, pojawia się błąd:
No overload matches this call.
Overload 1 of 2, '(reducers: ReducersMapObject<{ reducerADD: { lastName: string; firstName: string; password: string; email: string; }[]; }, any>): Reducer<{ reducerADD: { lastName: string; firstName: string; password: string; email: string; }[]; }, AnyAction>', gave the following error.
Type '(state: never[] | undefined, action: action) => { lastName: string; firstName: string; password: string; email: string; }[]' is not assignable to type 'Reducer<{ lastName: string; firstName: string; password: string; email: string; }[], any>'.
Types of parameters 'state' and 'state' are incompatible.
Type '{ lastName: string; firstName: string; password: string; email: string; }[] | undefined' is not assignable to type 'never[] | undefined'.
Type '{ lastName: string; firstName: string; password: string; email: string; }[]' is not assignable to type 'never[]'.
Type '{ lastName: string; firstName: string; password: string; email: string; }' is not assignable to type 'never'.
Overload 2 of 2, '(reducers: ReducersMapObject<{ reducerADD: { lastName: string; firstName: string; password: string; email: string; }[]; }, AnyAction>): Reducer<{ reducerADD: { lastName: string; firstName: string; password: string; email: string; }[]; }, AnyAction>', gave the following error.
Type '(state: never[] | undefined, action: action) => { lastName: string; firstName: string; password: string; email: string; }[]' is not assignable to type 'Reducer<{ lastName: string; firstName: string; password: string; email: string; }[], AnyAction>'.
Types of parameters 'state' and 'state' are incompatible.
Type '{ lastName: string; firstName: string; password: string; email: string; }[] | undefined' is not assignable to type 'never[] | undefined'.
Type '{ lastName: string; firstName: string; password: string; email: string; }[]' is not assignable to type 'never[]'.
Jaki jest tego powód?
typescript
react-redux
Jezus
źródło
źródło
reducerADD
?const reducerADD = (state = [], action:action) =>{ switch (action.type) { case "ADD": return [...state, ...[action.add]]; default: return state; } }
Odpowiedzi:
Państwo musi być silniej wpisane. Próbuje rzutować stan początkowy z typu
any
na typnever
.Podczas tworzenia stanu domyślnego dla danych powinieneś zdefiniować interfejs dla swojego stanu, oto przykład tablicy listy rzeczy do zrobienia:
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