how to use the combinelatestwith function from the rxjs library in javascript

combineLatestWith is a function that allows combining the latest emissions from multiple observables into a single observable. Here's how to use it:

index.tsx
import { of } from 'rxjs';
import { combineLatestWith } from 'rxjs/operators';

const obs1$ = of(1, 2, 3);
const obs2$ = of('A', 'B', 'C');

obs1$.pipe(combineLatestWith(obs2$)).subscribe(([num, char]) => {
  console.log(`${num}${char}`);
});

// Output:
// 3C
261 chars
13 lines

In the above example, we have two observables obs1$ and obs2$ emitting numbers and characters respectively. We use combineLatestWith to combine the latest emissions from both observables into a single observable. The subscribe function logs the latest emission from both observables, which in this case is the number 3 and the character C.

Note that the combineLatestWith function returns a new observable, which means the source observables (obs1$ and obs2$ in this case) are left unchanged.