I created a mini app which shows the Continent & the Country selections.
just to practice RxJS concepts.
(You can checkout to ng-conf/learn-rxjs-01 branch on https://stackblitz.com/edit/stackblitz-starters-hvcdxw to experience the app).
I believe that I refactored the entire app to its best. But I still want to know if there is anything that I could enhance in the app [index.html, AppComponent - View & Model, models.ts files] to provide an optimal app performance & developer experience?