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import { createStore } from "redux";
import * as storage from "redux-storage";

const reducer = storage.reducer((state, action) => ({}));

const store = createStore(reducer, {});

When using the above code with strict enabled for typescript, I am receiving the following warning:

[ts] Argument of type 'Reducer<{}>' is not assignable to parameter of type 'Reducer<{}, AnyAction>'.
       Types of parameters 'state' and 'state' are incompatible.
         Type '{} | undefined' is not assignable to type '{}'.
           Type 'undefined' is not assignable to type '{}'.

I understand what TS strict mode is, but I don't understand why it interprets my state as potentially undefined

What could I be doing wrong? Or how could I deal with the error without doing something lazy like as any?

ed'
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1 Answers1

-1

The state value provided can be undefined. Forcing it should fix your problem. E.g. 

const reducer = storage.reducer((state = {}, action) => ({}));
George
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