How can I improve performance in my React app using useReducer?

How can I improve performance in my React app using useReducer?

Using useReducer can help manage complex state logic more efficiently. It reduces unnecessary re-renders by allowing you to update state in a more controlled manner.

Can you give me an example of how to implement useReducer?

Sure! Here's a simple example:

import React, { useReducer } from 'react';

const initialState = { count: 0 };

function reducer(state, action) {
  switch (action.type) {
    case 'increment':
      return { count: state.count + 1 };
    case 'decrement':
      return { count: state.count - 1 };
    default:
      throw new Error();
  }
}

function Counter() {
  const [state, dispatch] = useReducer(reducer, initialState);

  return (
    <div>
      Count: {state.count}
      <button onClick={() => dispatch({ type: 'increment' })}>+</button>
      <button onClick={() => dispatch({ type: 'decrement' })}>-</button>
    </div>
  );
}

What are the benefits of using useReducer over useState?

The main benefits include better state management for complex states, improved performance by reducing re-renders, and clearer separation of state logic from UI logic.