Understanding React's Built-in State Management

React's built-in state management relies on the useState and useReducer hooks to manage state within components. Here's a breakdown:

1. useState:

   • This hook is used for managing local component state. It returns an array with two elements: the current state value and a function to update it.
   • Example:

    const [count, setCount] = useState(0);
   
    // Update state
    setCount(count + 1);
   

2. useReducer:

   • For more complex state logic, useReducer is used. It works similarly to Redux by taking in a reducer function and an initial state, and returning the current state and a dispatch function.
   • Example:

    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:
          return state;
      }
    }
   
    const [state, dispatch] = useReducer(reducer, initialState);
   
    // Dispatch actions
    dispatch({ type: 'increment' });
   

These hooks help manage state locally within components without the need for external libraries.