Q:

How do we subscribe to the currently shown data in Angular Material Tables

I need to know when the currently shown data inside material table changes and I need to subscribe to that change.  If paginator is present, I need to get only the current page data. 
How do we do that? 

A:

You can subscribe to datasource.connect() in order to get currently shown data changes.  It only provides currently rendered data. 
this.dataSource.connect().subscribe(d => console.log(d));

