how to use the empty function from the rxjs library in typescript

To use the empty function from the RxJS library in TypeScript, you will first need to install the library by running the command npm install rxjs in your project directory. Once you have installed it, you can import the empty function from the library using the following code:

index.ts
import { empty } from 'rxjs';

const subscription = empty().subscribe({
  complete: () => console.log('Observable completed')
});
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In this example, we create an observable using the empty function and then subscribe to it. The empty function returns an observable that immediately completes without emitting any values, so the complete callback function passed to the subscribe method will be called immediately, logging "Observable completed" to the console. The subscribe method returns a Subscription object, which can be used to unsubscribe from the observable if needed.