In the past week I've been working on a personnal project using Flutter and Firestore. In this post will show how I did match the BLoC pattern with Firestore

How can I setup CORS in Google Cloud Functions. How can I remove the error 'Access-Control-Allow-Origin'. You get this issue about CORS and you don't know what to do ? I finally fix it on my side and I want to show you how I deal with it.