This project was generated with Angular CLI version 10.2.3.

https://www.youtube.com/watch?v=pIPyikqkFYE

Reacting to this special request, the server sends back a response header. This header contains an Access-Control-Allow-Origin key, to specify which origins can access the server’s resources. The key will have one of two values:

One: the server can be really strict, and specify that only one origin can access it:

Access-Control-Allow-Origin: http://localhost:3000

Two: the server can let the gates go wide open, and specify the wildcard value to allow all domains to access its resources:

Access-Control-Allow-Origin: *