Have you ever used libraries for application state management?

Yes, I have used libraries for managing application state, especially in the context of frontend development and server-side applications on Node.js.

For example, for the frontend, Redux or MobX are often used, which help centrally store and manage the application's state.

In server-side applications on Node.js, you can use tools such as:

• EventEmitter for managing events and state.
• Caching libraries, such as Redis, for storing state between requests.

Example of using EventEmitter:

const EventEmitter = require('events');
const stateManager = new EventEmitter();

let state = { count: 0 };

stateManager.on('increment', () => {
  state.count += 1;
  console.log('Count:', state.count);
});

stateManager.emit('increment');