What's the difference between JS and REST API?

Question

RESTful API

Restful apis of most different services have a JS and REST section.
example:
backendless.com/documentation/data/js/data_basic_s...
backendless.com/documentation/data/rest/data_basic...
What is the difference between JS and REST? In the case of the JS API, it is proposed to download a small js file, which contains methods for accessing the service API. So this file is just a replacement for superagent ? Those. js methods do the same GET, POST, etc. requests?
If so, what is the point of such an approach? Why can't you just always use REST with a library like superagent?

Answer 1

In this case, they just wrapped HTTP requests in a library for you. You can use this abstraction, or you can work with the HTTP API using the same superagent directly, as you prefer.