CRUD application in JS with AJAX Request to a third-party resource, ideas?

Question

JavaScript

Good afternoon forum users. The situation is this, I transferred to another faculty and in the academic difference I have the subject of Web programming. The teacher said to write a CRUD application in JS with an AJAX Request to a third-party resource . But I don't even know what it could be. Can anyone share ideas or tips?
Ps Classmates can not help - they had a different teacher and assignment.

Answer 1

CRUD is about reading, adding, editing and deleting records. For example, CRUD for a book table means that you can read the list of books, add a new one, edit one, and delete it if necessary.
It remains only to deal with JS and Ajax - Google is here to help, there are a lot of examples for every taste.
Here is an example
True, it uses not native JS, but Jquery. But your question title is a little contradictory to the tags that you indicated, so this example may be suitable, unless of course you need to do it on Node.js + MongoDB