bug#47488: Treatment of # in js.el

[Lars Ingebrigtsen]

Dmitry Gutov <dgutov@yandex.ru> writes:

> We could add a custom var that disables this behavior, of
> course. js2-mode has one, but it only affects the parser, not the
> indentation behavior.

If we could avoid having a user option, that's be nice...

> Maybe check against a specific list of preprocessor instructions, such
> as #define, #ifdef, etc.

I think that sounds like a good solution.  Grepping around a bit,
perhaps `cpp-font-lock-keywords-source-directives' in font-lock.el would
be a good source to use here?

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