React MobX: Simplifying State Management in React Applications

MobX is a formidable solution to the complicated issue of state management in web applications created using React. As one of the most favored JavaScript libraries, React provides users with powerful tools to create interfaces that are fast, efficient, and intercommunicative. Nevertheless, the more intricate an application grows, the more arduous the management of its state can become.

In this composition, we will scrutinize the ins and outs of MobX, its workings, and its ability to simplify state management in React applications.

What is MobX?

MobX is a simple, yet powerful state management library that was specifically designed for use with React applications. It provides a way to efficiently manage the state of your application, making it easy to build complex, highly interactive user interfaces.

At its core, MobX is all about keeping your application state in sync with your user interface. When you make a change to the state of your application, MobX automatically updates yor user interface to reflect those changes. This means you can focus on building your application, without having to worry about managing state yourself.


How does MobX work?

At a higher echelon, MobX operates via the use of observables and reactions. Observables refer to values that can be observed for alterations, whereas reactions are functions that are automatically re-executed each time an observable value changes. This simplifies the process of keeping your application state synchronized with your user interface, without having to write an excess of boilerplate code.

To utilize MobX in your React application, you simply need to define your state as observables. Doing so instructs MobX to keep track of changes to that state and update any aspects of your user interface that rely on that state automatically. You can then use reactions to carry out side effects based on modifications to your observables.


Getting started with MobX

To get started with MobX, you’ll need to install the library and set up a few basic components. First, you’ll need to install the mobx and mobx-react packages:

npm install mobx mobx-react --save

Next, you’ll need to set up your MobX store. This is where you’ll define your application state as observables. Here’s an example of what your store might look like:

import { observable, action } from 'mobx';

class TodoStore {
  @observable todos = [];

  @action addTodo = (title) => {
    this.todos.push({ title });

  @action removeTodo = (index) => {
    this.todos.splice(index, 1);

const store = new TodoStore();

export default store;

In this example, we’re defining a TodoStore class that contains a single observable value, todos. We’re also defining two actions, addTodo and removeTodo, which modify the todos array. When these actions are executed, MobX automatically updates any parts of our user interface that depend on the todos value.

Using MobX with React

Now that we’ve set up our MobX store, we can start using it in our React components. To do this, we’ll need to wrap our components in a Provider component, which provides our MobX store to all child components. Here’s an example of what that might look like:

import React from 'react';
import { Provider } from 'mobx-react';
import TodoList from './TodoList';
import store from './store';

const App = () => {
  return (
    <Provider store={store}>
      <TodoList />

export default App;

In this example, we’re wrapping our TodoList component in a Provider component, which provides access to our MobX store through the store prop. This allows us to access and modify our observables from within our components.

Now, let’s take a look at how we might use our MobX store in a simple TodoList component:

import React from 'react';
import { observer, inject } from 'mobx-react';

const TodoList = inject('store')(observer(({ store }) => {
  const { todos } = store;

  const handleSubmit = (event) => {
    const title =;
    store.addTodo(title); = '';

  return (
      <form onSubmit={handleSubmit}>
        <input type="text" name="title" placeholder="Add todo" />
        <button type="submit">Add</button>
        {, index) => (
          <li key={index}>
            {todo.title} <button onClick={() => store.removeTodo(index)}>x</button>

export default TodoList;

In this example, we’re using the inject and observer higher-order components provided by mobx-react to inject our MobX store into our TodoList component, and automatically update the component whenever the todos observable changes.

We’re also defining a handleSubmit function that adds a new todo to our store when the form is submitted. Finally, we’re rendering a list of todos, along with a button that removes each todo when clicked.


Advantages of using MobX with React

There are several advantages to using MobX with React. Here are just a few:


1. Simplified state management

MobX provides a simple, declarative way to manage state in your React application. By defining your state as observables, MobX automatically keeps track of changes to that state and updates any parts of your user interface that depend on it.


2. Increased performance

MobX is highly optimized for performance. By using observables and reactions, MobX is able to efficiently update your user interface only when necessary, resulting in faster, more responsive applications.


3. Easier to reason about

As MobX affords a simple, declarative mechanism for managing state, it becomes more straightforward to comprehend how your application is operating. There is no need to concern yourself with managing state manually or monitoring intricate state transitions. MobX shoulders the responsibility of performing those tasks for you.


4. Integration with React

MobX was specifically designed to work with React, and provides a number of useful tools and utilities for integrating with React components. This makes it easy to use MobX alongside other React libraries and frameworks.





What other libraries can I use with MobX?

MobX works well with a wide range of other libraries and frameworks, including React, Vue, and Angular.


Is MobX difficult to learn?

Not at all. MobX is designed to be simple and easy to use. There are plenty of resources available online to help you get started.


Can I use MobX with TypeScript?

Yes, MobX has excellent support for TypeScript.


Are there any downs or disadvantages of using MobX?

One potential downside of using MobX is that it can sometimes be difficult to understand how it works under the hood. This can make it more challenging to debug issues that arise in your code.


Is MobX suitable for large-scale applications?

Yes, MobX is suitable for large-scale applications. In fact, MobX was designed specifically for use in large-scale applications, and provides a number of features and utilities that make it well-suited to this use case.


As a whole, MobX embodies a powerful tool for managing state within your React applications. Through its provision of a straightforward, declarative approach to state management, MobX can aid in simplifying your code, making your applications more performant and more easily comprehensible. When constructing a complex, extremely interactive React application, MobX should certainly be among the options that you give careful consideration to.



To summarize, MobX stands as a potent state management library capable of streamlining state management in your React applications. With its utilization of observables and reactions, MobX supplies a straightforward, declarative mode of state management that is remarkably optimized for performance. If you’re constructing a complicated, extremely interactive React application, it is undeniably prudent to give serious consideration to MobX.


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