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

From: Boris Zbarsky <bzbarsky@MIT.EDU>
Date: Wed, 28 Dec 2011 18:12:51 -0500
Message-ID: <4EFBA273.3070609@mit.edu>
To: Lea Verou <leaverou@gmail.com>
CC: Brian Kardell <bkardell@gmail.com>, www-style@w3.org
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).

Received on Wednesday, 28 December 2011 23:13:29 UTC

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