Game Card contains Card, Deck, CardStack and CardPile components for creating card games using Vaadin 10+. Card represents a single playing card that can be front or back side up. To avoid cheating the card information is not sent to the browser if the back side is up. Deck contains a collection of cards and the top card can be drawn. CardStack contains 0..N cards that are placed below each other so the value of all cards (which are not backside up) can be seen. A CardPile represents a pile of cards on top of each other. Can also be empty. Nothing but the top card can be shown.