Obtain accurate dispatch type by leveraging ConnectedProps in conjunction with redux-thunk

Currently, I am utilizing Redux-Toolkit and Typescript. Specifically, my goal is to implement ConnectedProps as recommended in the redux documentation. However, it appears that the dispatch type is not recognized correctly (it is identified as a normal Dispatch instead of a ThunkDispatch).

Any advice on how to address this issue? Currently, I have been:

(1) Using a custom 'useThunkDispatch' hook. Although effective, this approach adds an extra line of code and import that I would prefer to avoid.

(2) Opting for the function version of 'mapDispatch', explicitly defining my dispatch as a ThunkDispatch (or AppDispatch as described in the redux toolkit documentation

Explore the Code Sandbox: https://codesandbox.io/s/connectedprops-typing-for-thunk-uyplw

typescriptreduxreact-reduxredux-thunk

Answer №1

As per your input, the direct utilization of dispatch from connect seems to be the root cause of the issue.

Since your Redux store is defined independently from the React components that utilize it, there's no way for them to know any custom configurations you might have implemented when setting up the store. Especially in the case of TypeScript, connect lacks the awareness of whether your store includes the thunk middleware, consequently requiring the dispatch prop to be typed as ThunkDispatch instead of Dispatch.

This is why we advocate strongly for employing the "object shorthand" approach with mapDispatch in conjunction with connect, allowing your component to remain oblivious to such distinctions.

If you do wish to explicitly involve dispatch within your component, a couple of alternatives are available:

From my standpoint, I would recommend opting for hooks.

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