What happens when filter is passed in pipe?

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Can someone help me to understand why below subscription is not working.

  isLoggedIn1$:Observable<boolean> = of(false) // on subscribing it I get value as false

  isLoggedIn2$:Observable<boolean> = of(false).pipe(filter(value => Boolean(value))) // this one is not giving any value even it looks like subscribe is not getting called for this

Is there any documentation for this particular behavior?

as I understand it is being treated equivalent to EMPTY. but then why I am not getting type error for second one

Source: Angular Questions

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Categorized as angular, rxjs Tagged ,

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