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

The share operator is used to share a single source of data among multiple subscribers. It allows the source to be subscribed only once, and then multicast the data to all subscribers. This can be useful for preventing the source from being subscribed multiple times, such as in the case of expensive API calls.

Here's an example of how to use the share operator with RxJS in JavaScript:

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

const source = of('Hello World').pipe(share());

// Subscriber 1
source.subscribe(val => console.log(`Subscriber 1: ${val}`));

// Subscriber 2
source.subscribe(val => console.log(`Subscriber 2: ${val}`));
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In this example, we first import the of function from RxJS to create a new observable with a value of 'Hello World'. We then use the pipe method, along with the share operator to share this observable among multiple subscribers.

The two subscribers each receive the same value from the source observable, but the source is only subscribed once. You can try running this code yourself to see how it works!