How can I handle errors in Redux effectively?

How can I handle errors in Redux effectively?

To handle errors in Redux, you can use middleware like Redux Thunk or Redux Saga to manage asynchronous actions and catch errors.

Can you give me an example of error handling in a Redux action?

Sure! In a Redux action, you can dispatch an error action if an API call fails. For example:

export const fetchData = () => async (dispatch) => {
  try {
    const response = await api.get('/data');
    dispatch({ type: 'FETCH_SUCCESS', payload: response.data });
  } catch (error) {
    dispatch({ type: 'FETCH_ERROR', payload: error.message });
  }
};

What should I do with the error in my reducer?

In your reducer, you can handle the error by updating the state to include the error message. For example:

const initialState = { data: [], error: null };

const reducer = (state = initialState, action) => {
  switch (action.type) {
    case 'FETCH_SUCCESS':
      return { ...state, data: action.payload, error: null };
    case 'FETCH_ERROR':
      return { ...state, error: action.payload };
    default:
      return state;
  }
};