how to use the never function from the rxjs library in typescript

To use the never function from the rxjs library in TypeScript, first you need to import it as follows:

index.ts
import { never } from 'rxjs';
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The never function returns an Observable that never emits any values and never completes or errors out. This could be useful when you want to represent an empty stream that will not emit any values.

Here is an example of using the never function to create an empty Observable:

index.ts
import { never } from 'rxjs';

const empty$ = never();

empty$.subscribe(
  value => console.log(value),  // never called
  error => console.log(error),  // never called
  () => console.log('complete') // never called
);
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In this example, the empty$ Observable will never emit any values and will never complete or error out, so none of the subscribe callback functions will ever be called.