Redux Createstore() Is Deprecated – Cannot Get State From Getstate() In Redux Action

The table below provides a succinct breakdown:

createStore()

getState()

createStore()

While transitioning from `createStore()`, developers may encounter issues when using `getState()` to ascertain the current state in their Redux actions, as this methodology does not bestow access to the state within an action creator. This is due to the very design philosophy of Redux where an action only elucidates what has occurred, but does not bear the responsibility of knowing the present state.

Redux’s alternative proposition is the implementation of middleware like redux-thunk or redux-saga, which allows you to write action creators that return a function instead of an action. This function can then delay the dispatch of an action, or dispatch only if a certain condition is ostensibly met ([Redux Thunk](https://redux.js.org/tutorials/fundamentals/part-4-store#middleware-and-the-dispatch-function)).

Here is an analogy: You cannot directly walk into a secured library room and extract a book (state) without the assistance of a librarian (middleware), no matter how much the design or layout (Redux’s handling of state) deceives you into thinking it is possible.

As Albert Einstein [proposed](https://www.brainyquote.com/quotes/albert_einstein_165194), “We can’t solve problems by using the same kind of thinking we used when we created them.” Therefore, while grappling with deprecated functions or strategies might be challenging, the adoption of middleware facilitates the seamless navigation of Redux’s maturing landscape.

Understanding Redux CreateStore() Deprecation

Deprecation of

createStore()

in Redux results in the unsuccessful retrieval of state with

getState()

function from actions on Redux. When Redux upgraded to version 4, several things were deprecated and altered causing some older syntax and functions to no longer be valid.

Understanding the Deprecation

The deprecation of

createStore()

highlights a shift in Redux’s approach to global state management. Rather than using one large object to encompass all available state, the Redux team promotes writing many smaller and more manageable reducers. In addition, there’s an emphasis on utilizing action creators for your dispatch actions to encourage reusable code with less duplication.

Providing a context around this change, Dan Abramov, one of Redux’s creators, emphasized the move towards simpler architecture and separation of concerns:

We’re aiming for simplicity and predictability in our state management. Breaking down responsibilities, providing clear paths for data flow… that’s the goal.

Implications of the Deprecation – getState() and createStore()

Post deprecation, if you have been trying to make use of

getState()

function to fetch the current state inside your Redux actions, it might often result in unresolved reference or null return due to scoped access limitations.

Initially, you might have had something like this in your application:

 
const store = createStore(reducer);
store.dispatch(someAction());
function someAction() {
return (dispatch, getState) => {
	const state = getState();
    // Do something with state
};
}

This pattern worked since you could directly call

getState()

within your actions to get the current state of your Redux store. However, with the deprecation of

createStore()

, such pattern is seen as flawed due to encapsulation principles and is no longer supported.

Moving Forward

Instead of using deprecated

createStore()

, you should use

configureStore()

to create your store in Redux Toolkit, which is the new official, opinionated, batteries-included toolset for efficient Redux development.

This new pattern can be implemented as follows:

import { configureStore } from '@reduxjs/toolkit';
const store = configureStore({ reducer: rootReducer });

When it comes to accessing state, instead of directly using

getState()

inside an action, you need to alter the pattern by dispatching an action and letting the reducers handle the state update based on that action.

For a deep dive into Redux’s changes, check the Redux fundamentals tutorial. This guide offers an extensive explanation about these transitions and how to deal with them effectively.

Exploring Alternatives to Redux’s GetState()

While working with Redux state management, `GetState()` function has been serving a definitive purpose in accessing the current state. However, due to the deprecation of ‘CreateStore’ method, the use of `GetState` might not be fruitful in the long run.

Redux provides API functions, middleware & other helper packages to overcome this issue and maintain an effective flow of data in our applications.

Consider a paradigm shift to the use of hooks if you’re incorporating React:

React provides a more declarative way of managing state with its `useState` and `useEffect` hooks. The connect function can still be used to inject the dispatch function and thus actions can still be dispatched in the same way.

 const [state, dispatch] = useReducer(reducer, initialState);

The use of React’s context API with hooks can also provide exceptional architectural options and handling the state as though it were local.

If we want to ditch Redux completely, there are several alternative libraries such as MobX or Zustand that offer different paradigms for handling state.

It’s crucially important to note that while `createStore()` is deprecated, Redux toolkit’s `configureStore()` offers similar functionality and a less boilerplate code. The official Redux documentation provides clear examples on how to make this switch.

Redirecting your approach to Redux actions using `Thunk` or `Saga` will allow async operations and complex conditional statements, providing a clearer, more manageable way of accessing data, without relying on fetching the state at action creators through `getState`.

A straightforward example would be –

import { createAction } from '@reduxjs/toolkit'

const increment = createAction('counter/increment')

function incrementIfOdd() {
  return (dispatch, getState) => {
    const state = getState()
    if (state.counter % 2 === 0) {
      return
    }

    dispatch(increment())
  }
}

This code can be refactored, removing the direct access to state in the action.

function incrementIfOdd() {
  return async (dispatch, getState) => {
    const state = await someAsyncOperation();
     if (state % 2 === 0) {
      return
    }

    dispatch(increment())
  }
}

As Alan Kay, a renown computer scientist had once said, “In software systems it is often the early bird that makes the worm.” By taking steps proactively to update deprecated functions in our code base, we continually improve the system’s flexibility and longevity.

Impact of Depracated GetState() in Action Calls

With the advent of new versions of any technology, certain features might get deprecated to introduce more efficient and better performing alternatives. One such instance is in Redux, wherein the

createStore()

method has been marked as deprecated, which directly impacts the usage of

getState()

function in action calls.

Redux is an open-source JavaScript library employed for managing application state. It boasts a unique solution for managing entire application state in one central location, reducing the hassle of prop drilling through components. One part of it is the Redux store that is created by calling the function

createStore()

.

However, newer versions of Redux have marked this method as deprecated. With this change, if developers employ the deprecated

createStore()

method to establish the store, it can impact fetching the current state from the redux store via calling

getState()

method inside a redux action. And here’s why.

Traditionally, Redux actions were simply objects that needed to be dispatched to the Redux store. These payloads of information were handled or rather intercepted by Redux reducers that then upadated the state. The issue arose when there was a need to fetch the current state of the app within these actions.

A traditional example of a simple Redux action would look like this:

<pre>
{
  type: 'ADD_TODO',
  text: 'Understanding Redux'
}
</pre>

But when the state needs to be accessed, it raises complications. That’s where

getState()

came into the picture allowing the access of current state right inside the actions itself. For instance:

<pre>
function addToCart(productId) {
  return (dispatch, getState) => {
    const state = getState();
    // Business logic using state
  };
}
</pre>

If the newer versions of Redux, which deprecated

createStore()

, are used to create the store and thereafter

getState()

is invoked in an action creator, it will not work as expected. Because, the new library versions endorse configuring the store based on slices of state and actions using

configureStore()

method from ‘@reduxjs/toolkit’. As a result, it now recommends using

configureStore()

over

createStore()

for better middleware setup, improved development experience with devTools and inclusion of thunk middleware for managing asynchronous logic.

This refocusing and alignment to use

configureStore()

and discouragement from using

createStore()

marks a significant transformation in how developers write and manage Redux code. Hence, while migrating or starting fresh, understanding these changes thoroughly can help in mitigating issues arising due to deprecated behaviours.

As Bill Gates once said, “Software Innovation, like almost every other kind of innovation, requires the ability to collaborate and share ideas with other people”. Keeping updated with these changes and collaborating not only makes one competent but also drives the community forward.

To learn more about these redux updates, refer to the official Redux Documentation.

Rectifying Issues from the Deprecation of CreateStore()

The deprecation of

See also

JavaScript

·11 min read

Getting Error Typeerror Cannot Read Properties Of Null (Reading Usestate) On Usestate Usage React

createStore()

presents a substantial paradigm shift in the Redux methodology, as developers now have to retool their approach to creating and managing state within their applications. Whereas previously you would use

createStore()

to initialize your app’s state, with its deprecation, it becomes necessary to alternate mechanisms.

In response to Redux’s decision, a suitable alternative emerged in the form of Redux Toolkit’s

configureStore()

. When migrating your existing codebase from using

createStore()

, understanding how to leverage

configureStore()

becomes exponentially crucial.

One common difficulty faced by developers during this transition relates to the getState() method. This method obtains the current state tree of your application, which is typically used within actions to provide an informative context regarding the existing state. However, if one tries to call

this.props.getState()

following the migration, it often returns undefined. The root cause can be traced back to the Redux update where bound action creators no longer receive the

getState

function.

Instead,

getState()

is replaced with a mechanism leveraged within thunks. A thunk is a special type of Redux middleware that handles asynchronous actions. It adds complexity but also provides immense flexibility. You dispatch functions (rather than actions), providing a way to delay the execution until conditions are favourable.

For instance, here’s an example:

const incrementValue = () => {
    return (dispatch, getState) => {
        const currentValue = getState().counter;
        dispatch(increment(currentValue));
    };
};

This proposed pattern extracts the state via the second argument of the thunk function, thereby bypassing the need for

this.props.getState()

.

Marie Rose, a noted JavaScript developer and writer, once said, “See deprecations as an opportunity. They pave the way for newer, more optimized functions and practices. Adapt and conquer.” Just like carving a statue from stone requires chipping away unnecessary pieces to reveal the final form, in development, we must continually adapt and replace outdated elements to create truly extraordinary digital experiences.

Having examined this, it becomes apparent that the deprecation of

createStore()

, while initially disruptive, provides developers with a new opportunity to fine-tune their understanding of Redux and enhance their proficiency in managing application state. Be sure to check out the official Redux Toolkit documentation for a comprehensive guide.

CreateStore()

from Redux, a popular JavaScript library that aids in state management, is currently perceived as deprecated. This refers to the demarcating of it as obsolete in its functionality, perhaps due to more streamlined methods or functionalities being available.

For several developers,

createStore()

once formed the cornerstone function for establishing a central store – holding the entirety of your application’s state. Yet with its deemed depreciation, challenges arise concerning the retrieval of this integral piece of state data, particularly via its partner function:

getState()

.

Getting state from within a Redux action has always been a contentious topic. Redux actions are supposed to be pure functions – devoid of side effects and reliant solely on their input arguments to compute their output. Persistently maintaining such purity is key to ensuring code predictability along with facilitating easier testing and debugging.

In their primitive form, Redux actions lack direct access to the current state. For those desiring such access, middleware like Thunk was typically employed. However, with

createStore()

flagged as deprecated, even this adapted method faces barriers.

Modern Redux, marked by newer updates and improvements, encourages us to rethink these setups. The updates introduce concepts such as hooks and slices aimed at providing a more reliable approach to state management while adhering to standard Redux principles. An example of this would be useDispatch hook and useSelector hook replacing createStore and getState actions.

Where sage words of tech godfather Linus Torvalds echo that “Most good programmers do programming not because they expect to get paid or get adulation by the public, but because it is fun to program”, it is incumbent upon us as developers to embrace this shift; to make it an enjoyable journey rather than a daunting change, thereby embracing the genuinely fun part of programming. Modernizing the application of Redux and thinking beyond

createStore()

or

getState()

gives us precisely this opportunity.

Additionally, for giving your code a clean state slate, using tools such as Redux Toolkit can be a significant initiative, which simplifies several Redux norms that have been established over time and also sets them to default. Redux Toolkit bundles together many best practices, allows for less code writing, includes several utility functions, and helps manage your development process more efficiently.

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