Have you worked with RxJS?

Yes, I have worked with RxJS. It is a library for reactive programming using Observables, which allows convenient handling of asynchronous data streams, events, and operations on them.

For example, in frontend development, RxJS is often used for processing user events, AJAX requests, timers, and other asynchronous operations using operators such as map, filter, debounceTime, etc.

An example of using RxJS to handle user input with a delay:

import { fromEvent } from 'rxjs';
import { debounceTime, map } from 'rxjs/operators';

const input = document.getElementById('search') as HTMLInputElement;

fromEvent(input, 'input')
  .pipe(
    debounceTime(300), // wait 300 ms after the last input
    map(event => (event.target as HTMLInputElement).value)
  )
  .subscribe(value => {
    console.log('Search:', value);
    // Here you can make an API request
  });

RxJS helps write cleaner and more declarative code for complex asynchronous scenarios.