bug#10512: Please support pseudo-elements in CSS syntax

[Lennart Borgman]

On Mon, Jan 16, 2012 at 17:04, Stefan Monnier <monnier@iro.umontreal.ca> wrote:
>> Should not this be supported in CSS files?
>
> Maybe it should.  I've written a fair part of css-mode.el and might be
> considered as its maintainer, but I know next to nothing about CSS :-(
>
>> span:nth-of-type(2) {
>>     color: black;
>> }
>
> Could you explain to me which part of the above example corresponds to
> the use of "pseudo-elements", and maybe also explain (very briefly) what
> are pseudo-elements?

It is ":nth-of-type(2)", i e it starts with a colon. (Maybe it is
called "pseudo-classes", not sure.)

Standard is here:
http://www.w3.org/TR/selectors/#pseudo-classes

More readable version here:
http://www.w3schools.com/cssref/css_selectors.asp