W3C home > Mailing lists > Public > www-style@w3.org > December 2018

Re: Better handling of unknown selectors in a css rule

From: Florian Rivoal <florian@rivoal.net>
Date: Mon, 17 Dec 2018 15:49:12 +0900
Message-Id: <09FEA5A8-FF64-4CCD-B073-9AEEA6B1C664@rivoal.net>
Cc: www-style <www-style@w3.org>
To: saeed serpooshan <saeedserpooshan@gmail.com>

> On Dec 16, 2018, at 20:43, saeed serpooshan <saeedserpooshan@gmail.com> wrote:
> According to https://drafts.csswg.org/css-syntax/#css-stylesheets ,
> invalid CSS selectors causes the whole rule to be dropped!
>> ... If any style rule is invalid, or any at-rule is not recognized or is invalid according to its grammar or context, it’s a parse error. Discard that rule.
> But there are many many situations we need to include some new selector in our
> rule set, and it is reasonable that browser ignore only those
> selectors that doesn't support it.


Thanks for reporting this. Unfortunately, this is a known problem that we cannot fix. The reason why is documented in here:

https://wiki.csswg.org/faq#error-handling-in-selectors-aka-breaking-pages-by-making-them-work <https://wiki.csswg.org/faq#error-handling-in-selectors-aka-breaking-pages-by-making-them-work>

Best regards,
Received on Monday, 17 December 2018 06:49:38 UTC

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