Re: [css4-ui]/[css4-selectors] Pseudo-class for selecting broken images & other external resources

On 12/28/11 5:57 PM, Lea Verou wrote:
> Ideally, with separate pseudoclasses for HTTP errors and
> broken data.

I don't think that's necessarily terribly realistic.  The two can't be 
told apart reliably, for one thing: lots of servers return random HTML 
with a 200 response on HTTP errors.

> If the same concept is applied to linked scripts and CSS
> files, it's even more important that they are separate, as most CSS
> files these days intentionally contain errors ("progressive
> enhancement") so it would be useless otherwise.

There is no such thing as a "parse error" from the point of view of CSS, 
yeah.  But there are non-HTTP-level fatal errors (e.g. inability to find 
a decoder for the declared encoding, security policies blocking the 
load, etc, etc).

-Boris