State Management MobX

MobX is a state management library for React and other JavaScript frameworks that is based on the concept of observables. With MobX, you can create observables that automatically update your application state whenever their values change. This makes it easy to manage complex application state in a simple and predictable way.

Here’s an example of how to use MobX in a React application:

jsx
import React from "react";
import { makeObservable, observable, action } from "mobx";
import { observer } from "mobx-react";

class CounterStore {
  count = 0;

  constructor() {
    makeObservable(this, {
      count: observable,
      increment: action,
      decrement: action,
    });
  }

  increment() {
    this.count++;
  }

  decrement() {
    this.count--;
  }
}

const counterStore = new CounterStore();

const Counter = observer(() => {
  return (
    

      
Count: {counterStore.count}
      +
      -
    
  );
});

function App() {
  return (
    

      
    
  );
}

export default App;

In this example, we’re creating a `CounterStore` class that manages the counter state. We’re using the `makeObservable` function from MobX to make the `count` property observable, and to define the `increment` and `decrement` actions.

We’re also creating a `counterStore` instance of the `CounterStore` class, which we can use to manage the counter state in our application.

We’re using the `observer` function from MobX-React to create a `Counter` component that automatically updates whenever the `count` observable changes. This ensures that the component always displays the correct count value, and that it re-renders only when necessary.

By using MobX, we can manage complex application state in a simple and predictable way. We can create observables that automatically update our application state whenever their values change, and we can use the `observer` function to create reactive components that update automatically whenever the state changes.

Overall, MobX is a powerful and flexible state management library that can be used to manage state in React and other JavaScript frameworks. By using MobX, we can create scalable and maintainable applications that are easy to reason about and debug.