How to combine useContext with useReducer?

Combining useContext with useReducer in React allows you to manage a global state more effectively by providing a centralized state management solution.

How to combine useContext with useReducer?

• Create a Context: First, you need to create a context to hold your global state and provide it to your component tree. You can use the React.createContext() function for this purpose.
• Define a Reducer: Define a reducer function that specifies how state transitions should occur in response to dispatched actions. The reducer takes the current state and an action as arguments and returns the new state.
• Use useReducer Hook: Inside your component, use the useReducer hook to manage state transitions based on dispatched actions. This hook returns the current state and a dispatch function, which is used to send actions to the reducer.
• Use useContext Hook: Use the useContext hook to access the state and dispatch function provided by the context.

Example: Below is an example of combining useContext with useReducer.

• We create a context called GlobalStateContext.
• We define a reducer function that manages state transitions for a simple counter.
• We use the useReducer hook inside the GlobalStateProvider component to manage the global state.
• We provide the state and dispatch function to the context using GlobalStateContext.Provider.
• We use useContext to access the state and dispatch function in the Counter component.
• Finally, we wrap our Counter component with the GlobalStateProvider in the App component to make the global state available to it.

Output: