throttle2.ts

import { fromEvent, interval } from 'rxjs';
import { tap, throttle } from 'rxjs/operators';

const clicks = fromEvent(document, 'click');
//const result = clicks.pipe(throttle(ev => interval(1000)));


const result = interval(2000).pipe(tap(x => console.log('v:', x)), throttle( i => clicks, {leading: true, trailing: true}));
result.subscribe(x => console.log(x));

// trailing true, so emit the latest value when mouse clicked.