js--get-all-known-symbols

js--get-all-known-symbols is a compiled Lisp function in `js.el'.

(js--get-all-known-symbols)

Return a hash table of all JavaScript symbols.
This searches all existing `js-mode' buffers. Each key is the
name of a symbol (possibly disambiguated with <N>, where N > 1),
and each value is a marker giving the location of that symbol.