This project is an e-commerce application using Angular 8 and Angular Material. This project contains the following

1. How to mock a REST API server that uses fake data from a JSON file
2. How to consume the REST API from our Angular 8 application using Httplient
3. How to handle HTTP errors using the RxJS throwError() and catchError() operators
4. How to retry failed HTTP requests in poor network conditions and cancel pending requests using the RxJS retry() and takeUntil() operators
5. How to create and make use of Angular components and services
6. How to set up routing and Angular Material in our project and create a professional-looking UI with Material Design components

source : https://www.freecodecamp.org/news/angular-8-tutorial-in-easy-steps/