Other Exports#

Redux Toolkit exports some of its internal utilities, and re-exports additional functions from other dependencies as well.


An inlined copy of nanoid/nonsecure. Generates a non-cryptographically-secure random ID string. createAsyncThunk uses this by default for request IDs. May also be useful for other cases as well.

import { nanoid } from '@reduxjs/toolkit'
// 'dgPXxUz_6fWIQBD8XmiSy'


A re-worked, inlined copy of serialize-error. Serializes an error into a plain object. createAsyncThunk uses this by default for rejected cases. May also be useful other other cases as well.

Returns a plain object with optional name, message, stack and code properties.

import { miniSerializeError } from '@reduxjs/toolkit'
const serializedError = miniSerializeError(
new Error('Something has gone wrong')
// "Error"
// "Something has gone wrong"
// "Error: Something has gone wrong↵ at <anonymous>:24:34"

Exports from Other Libraries#


The default immutable update function from the immer library, re-exported here as createNextState (also commonly referred to as produce)


The current function from the immer library, which takes a snapshot of the current state of a draft and finalizes it (but without freezing). Current is a great utility to print the current state during debugging, and the output of current can also be safely leaked outside the producer.


The original function from the immer library, which returns the original object. This is particularly useful for referential equality check in reducers.

import { createReducer, createAction, current } from '@reduxjs/toolkit'
interface Todo {
const addTodo = createAction<Todo>('addTodo')
const initialState = [] as Todo[]
const todosReducer = createReducer(initialState, (builder) => {
builder.addCase(addTodo, (state, action) => {


The isDraft function from the immer library, which checks to see if a given value is a Proxy-wrapped "draft" state.


Redux's combineReducers, re-exported for convenience. While configureStore calls this internally, you may wish to call it yourself to compose multiple levels of slice reducers.


Redux's compose. It composes functions from right to left. This is a functional programming utility. You might want to use it to apply several store custom enhancers/ functions in a row.


Redux's bindActionCreators. It wraps action creators with dispatch() so that they dispatch immediately when called.


Redux's createStore. You should not need to use this directly.


Redux's applyMiddleware. You should not need to use this directly.