What are some advanced patterns in Redux Toolkit with TypeScript?

What are some advanced patterns in Redux Toolkit with TypeScript?

Advanced patterns in Redux Toolkit with TypeScript include using createSlice for reducers, leveraging createAsyncThunk for async actions, and implementing selectors for derived state.

Can you explain how to use createAsyncThunk?

Sure! createAsyncThunk is a utility that helps you create asynchronous actions. You define a thunk that returns a promise, and Redux Toolkit handles the action types for pending, fulfilled, and rejected states automatically.

How do I handle errors in createAsyncThunk?

You can handle errors by using the rejectWithValue function in your thunk. This allows you to return a custom error payload that can be accessed in your reducers.

What are selectors and how do I create them?

Selectors are functions that extract specific pieces of state from your Redux store. You can create them using the createSelector function from the Reselect library, which helps in memoizing the results.

Can you give an example of a selector?

Certainly! A simple selector could be const selectUser = (state) => state.user; which retrieves the user state from the store.