JSFiddle - React, Tailwind, and code Playground
HTML
<script src="https://cdnjs.cloudflare.com/ajax/libs/rxjs/6.2.2/rxjs.umd.js"></script>
JavaScript
var subject = new rxjs.Subject();
subject.next(0);
subject.next(1);
var subscription = subject.subscribe(x => console.log(x));
subject.next(2);
subject.next(3);
subscription.unsubscribe();
subject.next(4);
subject.next(5);