Bind array Asynchronously

Can someone do my help. I want to show while elements are pushing to the array. Means Asyc list.
It takes 10 seconds to fetch data from json and then show to front end end in list. JSON data is very large like 10000-50000 lines. Any way to show even if it fetched 50 lines like simultaneous side by side fetching and showing. Or any other way?

You can you use ionic infiniteScroll to paginate the list just follow the documentation here