That works for me in the latest Canary (35.0.1895.0). For polyfill support,
you still need to add the equivalent polyfill-next-selector {} rule. This
should work in Canary (with flags) and stable:

http://jsbin.com/gacogeda/3/edit


On Fri, Mar 14, 2014 at 6:43 PM, Jan Miksovsky <[email protected]> wrote:

> Ah, thanks. I'd seen discussion of /shadow/ and /shadow-deep/, but not
> /content/.
>
> Should /content/ work right now? The updated jsbin at
> http://jsbin.com/gacogeda/2/edit still doesn't seem to work. Or are we in
> some place where ::content no longer works, but /content/ doesn't work yet?
>
>
> On Friday, March 14, 2014 5:41:47 PM UTC-7, Steve Orvell wrote:
>
>> Yes, it was changed to match the spec here: http://dev.w3.org/csswg/
>> shadow-styling/.
>>
>> The ::content pseudo-element was removed. The /content/ combinator was
>> added. So your rule could be:
>>
>> content /content/ * { color: red; }
>>
>> Note, a combinator must have some selector to the left of it.
>>
>> In addition the ^ and ^^ combinators were renamed to /shadow/ and
>> /shadow-deep/.
>>
>> Hope that helps.
>>
>>
>> On Fri, Mar 14, 2014 at 5:08 PM, Jan Miksovsky <[email protected]> wrote:
>>
>>> I just upgraded Canary to 35.0.1892.2, and CSS rules with ::content CSS
>>> selectors no longer seem to be applied as expected. I'm wondering if the
>>> ::content syntax changed recently.
>>>
>>> As far as I know, the syntax for ::content looks like:
>>>
>>> ::content * {
>>>   color: red;
>>> }
>>>
>>> This is what's shown in the Guide to Styling article on the Polymer
>>> site, for example.
>>>
>>> Repro: http://jsbin.com/gacogeda/1/edit. This jsbin works in an older
>>> Canary (35.0.1887.0), but not in the latest Canary.
>>>
>>> I also happened to notice a recent Polymer checkin that used a different
>>> content syntax like:
>>>
>>> ::content(*) {
>>> }
>>>
>>> But I haven't seen a breaking change announcement anywhere -- did I miss
>>> it?
>>>
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>>
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