Javascript private class features

Thank you rraghvani for your reply,

I had read the page but had not noted the title on "Unsupported Features".

As the page is formulated, I had not assimilated that one could take again all the functionality of the engine V8 version 5.8 except the information mentioned in the page.

Well... Apart from the solution of creating functions or variables specific to the script containing the exported class, I can't see any other way of doing the equivalent of private methods or properties.

If you have any other ideas, I'm not against it, so I'll leave the subject open for a while.

Thanks in any case,
Have a nice day!