Encountering a problem in React.js and Typescript involving the spread operator that is causing an error

Could someone assist me with my current predicament? I attempted to work with TypeScript and utilize the useReducer hook.

const initialState = {
    a: "a"
};

const [state, dispatch] = useReducer(reducer, {...initialState});

I keep encountering an error when using the spread operator. The specific error message is:

No overload matches this call.
  Overload 1 of 5, '(reducer: ReducerWithoutAction<any>, initializerArg: any, initializer?: undefined): [any, DispatchWithoutAction]', gave the following error.
    Argument of type '(state: any, action: any) => void' is not assignable to parameter of type 'ReducerWithoutAction<any>'.
  Overload 2 of 5, '(reducer: (state: any, action: any) => void, initialState: void, initializer?: undefined): [void, Dispatch<any>]', gave the following error.
    Argument of type '{ a: string; }' is not assignable to parameter of type 'void'.

What exactly does this error mean?

This is how my .babelrc file is structured:

{
    "plugins": ["transform-object-rest-spread"],
    "presets": [
        "@babel/preset-env",
        "@babel/preset-react",
        "@babel/preset-typescript"
    ]
}

Can anyone point out where I might have made a mistake? Any help would be greatly appreciated.

Answer №1

Ensure that your reducer returns a value of the same type as initialState. If your

reducer/code> is currently outputting nothing (<code>void
), it will result in this error message.

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