[csswg-drafts] [css-pseudo-elements] There is nothing in the spec about where pseudo-elements inherit style from, in general

bzbarsky has just created a new issue for 
https://github.com/w3c/csswg-drafts:

== [css-pseudo-elements] There is nothing in the spec about where 
pseudo-elements inherit style from, in general ==
There's something about not having decided how it works for 
::selection, and ::before/::after/::first-lettter/::first-line have 
their weirdnesses that are defined in other specs.  But for others 
it's simple not defined. 

For example, does ::placeholder inherit from its originating element?
  From nothing?  Something else?

I would think the default should be to inherit from the originating 
element unless specified otherwise.  The other option is to have every
 pseudo-element defined in this spec and other specs explicitly say 
where it inherits from.

Please view or discuss this issue at 
https://github.com/w3c/csswg-drafts/issues/953 using your GitHub 
account