What is ForkJoin in RxJS?

Can you explain what ForkJoin is in RxJS?

Sure! ForkJoin is an operator in RxJS that allows you to combine multiple observables and wait for all of them to complete before emitting a single array of their last emitted values.

How does ForkJoin differ from other operators like Merge or CombineLatest?

Unlike Merge or CombineLatest, ForkJoin only emits once all the provided observables have completed. Merge emits values as they come, and CombineLatest emits whenever any observable emits a new value.

Can you give me an example of using ForkJoin?

Absolutely! Here's a simple example:

import { forkJoin, of } from 'rxjs';

const obs1 = of('Hello');
const obs2 = of('World');

forkJoin([obs1, obs2]).subscribe(result => {
  console.log(result); // Output: ['Hello', 'World']
});