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Discussion on: What Even Is A Dispatch Function?

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johnkeers profile image
John Keers

If you have multiple reducers, can you tell me how the dispatch function knows which reducer to call?
Is there a switch statement internally with action type as the parameter?

Update: Looking at the source code for createStore it looks like it only ever takes a single reducer? Does that mean you simply use combineReducer() and createStore will choose the correct reducer to use?

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dustinmyers profile image
Dustin Myers Author

Actually when you dispatch an action, it will go through all your reducers that you've "combined". It's the action type that's the magic here. You probably only have one reducer that handles that specific action type. All the other reducers will look at the action type, and return their slice of the state untouched.