RESTful API kickoff reading

Question

1. How to call a REST web service API from Javascript button Handler?
2. Build Node.js RESTful APIs in 10 Minutes
3. Using fetch to get data from an API
4. The XMLHttpRequest Object
5. jQuery.getJSON() – Load JSON-encoded data from the server using a GET HTTP request.
6. Get JSON data
7. A Beginner’s Guide To jQuery-Based JSON API Clients
8. Using AJAX & API’s (jQuery)
9. These methods perform the more common types of Ajax requests in less code.