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私はドキュメントを読んcreateAsyncThunkでいて、流れに戸惑いました。これはドキュメントからのものです：

import { createAsyncThunk, createSlice } from '@reduxjs/toolkit'
import { userAPI } from './userAPI'

// First, create the thunk
const fetchUserById = createAsyncThunk(
  'users/fetchByIdStatus',
  async (userId, thunkAPI) => {
    const response = await userAPI.fetchById(userId)
    return response.data
  }
)

// Then, handle actions in your reducers:
const usersSlice = createSlice({
  name: 'users',
  initialState: { entities: [], loading: 'idle' },
  reducers: {
    // standard reducer logic, with auto-generated action types per reducer
  },
  extraReducers: {
    // Add reducers for additional action types here, and handle loading state as needed
    [fetchUserById.fulfilled]: (state, action) => {
      // Add user to the state array
      state.entities.push(action.payload)
    }
  }
})

// Later, dispatch the thunk as needed in the app
dispatch(fetchUserById(123))


andには何を書く必要がreducersありextraReducersますか? 標準のレデューサーロジック?

古いreduxの方法を実装したこのCodeSandboxがあります。今、redux-toolkitそれに実装する必要があります。

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