Angular9Tutorial. Let's create two separate projects for this Angular 9 tutorial. One is for Angular Frontend, and one is for Node.js backend. That means one is for the frontend, and one is for the backend. We will create a backend API using node and mongodb, which deals with saving, modifying, and removing the form values from Database, and the frontend will consume that API; for example, it shows the data from the backend and post the data to node server and store the values in the database.