where has the client-side javascript jsdoc gone?

[iblanco]

There used to be some JSDoc for Alfresco Share's javascript libraries in the share-extras web page but now I can't find them anymore.

I've tried following the links in the doc but no luck: Alfresco Share JavaScript API reference | Alfresco Documentation 

Has those been deleted?

[afaust]

I don't know if Will Abson‌ is active on this platform, but he may be the best to answer that question since it was the Share Extras project hosting the JSDoc. You could also try and look in the commit history to find when (and mabe why) the JSDoc have been removed.