W3C home > Mailing lists > Public > www-style@w3.org > January 2015

Re: Shadow tree style isolation primitive

From: Ryosuke Niwa <rniwa@apple.com>
Date: Mon, 12 Jan 2015 13:57:40 -0800
Cc: Anne van Kesteren <annevk@annevk.nl>, "www-style@w3.org" <www-style@w3.org>, WebApps WG <public-webapps@w3.org>
Message-id: <3DEDB6CB-DD72-4EB5-81FC-758397C5F35E@apple.com>
To: chaals@yandex-team.ru

> On Jan 12, 2015, at 4:13 AM, chaals@yandex-team.ru wrote:
> 09.01.2015, 16:42, "Anne van Kesteren" <annevk@annevk.nl>:
>> I'm wondering if it's feasible to provide developers with the
>> primitive that the combination of Shadow DOM and CSS Scoping provides.
>> Namely a way to isolate a subtree from selector matching (of document
>> stylesheets, not necessarily user and user agent stylesheets) and
>> requiring a special selector, such as >>>, to pierce through the
>> boundary.
> Sounds like a reasonable, and perhaps feasible thing to do, but the obvious question is "why?"
> The use cases I can think of are to provide the sort of thing we do with BEM today. Is the effort worth it, or are there other things I didn't think of (quite likely, given I spent multiple seconds on the question)?

The benefit of this approach is that all the styling information will be in one place.  CSS cascading rules is already complicated, and having to consult the markup to know where the selector boundary is will be yet another cognitive stress.

- R. Niwa
Received on Monday, 12 January 2015 21:58:31 UTC

This archive was generated by hypermail 2.4.0 : Friday, 25 March 2022 10:08:50 UTC