in React, the management of component state is very important. Typically, we can use useState to manage component state. However, using useState can become very tedious if the state becomes more and more complex. At this point, we can consider using useReducer to manage the state. you might ask, why not use Redux? It is true that Redux is an excellent and popular state management tool, but there are some scenarios where Redux is not the optimal solution. For example, our application is very small, and using Redux at this time may bring additional complexity. Another example is to update the status frequently, which may cause a large number of action to be triggered, which adds additional overhead and complexity. Therefore, for similar scenarios, useReducer might be more appropriate. so how do we correctly apply useReducer ? This article will give you the answer. what is useReducer useReducer is a hook function used to manage the state of components in React. Its function is to decompose the state of the component into multiple values, and to provide a predictable and controllable way to update the state, thus making the code clearer and easier to understand. useReducer is defined as follows: const [state, dispatch] = useReducer(reducer, initialState); useReducer accepts two parameters: reducer : a function that accepts the current state and action (action) , returns the new state . In reducer , you can modify the state according to the type of action . initialState : the initial value of the state. useReducer & the return value of nbsp; is an…