I want to get all collection names in my project. Is it posible to get all collection names from angular Firebase project.
I saw this question and it not provide answer for angular firestore. Fetching all collections in Firestore
so this is not a duplicate question. thanks
As explained in the SO question/answer you refer to in your question (Fetching all collections in Firestore) there is no client API (Android, iOS, web) to list collections (top collections or sub-collections).
Since, if I am not mistaking, with angular (and angularfire2) you are building a "client" app (that use the web API under the hood) you will not find any API for that.
You may maintain a list of collections in specific Firestore document(s), i.e. when you create a collection programmatically you update this list.