js--re-search-backward

js--re-search-backward is a compiled Lisp function in `js.el'.

(js--re-search-backward REGEXP &optional BOUND NOERROR COUNT)

Search backward, ignoring strings, preprocessor macros, and comments.

This function invokes `re-search-backward' but treats the buffer
as if strings, preprocessor macros, and comments have been
removed.

If invoked while inside a macro, treat the macro as normal text.