bug#47488: Treatment of # in js.el

[Dmitry Gutov]

On 08.05.2021 15:43, Lars Ingebrigtsen wrote:
> Yeah, that doesn't seem correct for Javascript.  I've just removed that
> line in Emacs 28, and that seems to fix the issue for me.

I have just done a search, and there are still a fair number of lines like

#ifdef XP_UNIX
  #ifndef XP_MACOSX
    #define UNIX_BUT_NOT_MAC
  #endif
#endif

...

#ifdef UNIX_BUT_NOT_MAC
  pref("general.autoScroll", false);
#else
  pref("general.autoScroll", true);
#endif

in JS files in gecko-dev.

(The above is from browser/app/profile/firefox.js).

And they also have pieces like this.#m?.x; (mostly in test examples).

So ideally we would support both.