Calling SageMath functions from Javascript

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I ask the question and I have to admit that I'm a bit confused on the way to be precise to ask the question... Sorry for that!

Anyhow, I'm using from time to time SageMath on a local machine. I have seen that SageMath is also offering access from a server Sage Cell Server. If I understand well this is a way to access SageMath interpreter from a web browser.

But this doesn't provide access to the "base functions" of SageMath from JavaScript. That would be a kind of "wrapping" of SageMath basic functions in JavaScript calling a server. Is that possible?

Note: I also asked the question on StackOverflow