How can I get 'Total-Count' of resource from response header using visualize.js

Hi we are developing resources using visualize.js. 
For the pagination purpose I set the 'forceTotalCount' property to true and I am getting the total-count of the resources in the response header.
I am using “resourcesSearch “ property to get the list of resources in that I am not getting the response header . Someone please guide me how can I get the 'Total-Count' from the response header.
Also I wold like to know how can I integrate it with angualr6

Thanks,

Thushara