In this episode, we build a five-star review system with Angular and the Firestore NoSQL document database. Learn how to model data relationships and manage them from an Angular service. https://angularfirebase.com/lessons/star-ratings-system-with-firestore/
CodePen CSS Stars: https://codepen.io/jamesbarnett/pen/vlpkh
Firestore Data Model: https://firebase.google.com/docs/firestore/data-model