import { fromEvent } from 'rxjs'; const el = document.getElementById('my-element'); // Create an Observable that will publish mouse movements const mouseMoves = fromEvent(el, 'mousemove'); // Subscribe to start listening for mouse-move events const subscription = mouseMoves.subscribe((evt: MouseEvent) => { // Log coords of mouse movements console.log(`Coords: ${evt.clientX} X ${evt.clientY}`); // When the mouse is over the upper-left of the screen, // unsubscribe to stop listening for mouse movements if (evt.clientX < 40 && evt.clientY < 40) { subscription.unsubscribe(); } });