To allow you to hook into the moment after an action is dispatched and before the reducer runs
To allow you to send data from your application to the store.
To allow you to specify how the application's state changes in response to an action
To allow you to make async requests
What is the correct syntax for creating your own middleware
(store) => (next) => (action) => {}
(store) => (dispatch) => (action) => {}
(state) => (next) => (action) => {}
(store) => (dispatch) => (state) => {}
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