A reducer is a function that receives the action, along with a JavaScript object representing the initial (previous) state, and updates the state if needed.

A reducer function receives all the actions that are dispatched, it returns a newly updated state object.

What is a Redux Reducer?

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A function that sends a request to a server to fetch data

A function that takes in the current state and an action, and returns a new state

A function that updates the UI based on the current state

A function that listens for changes to the state and triggers an update

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