- From: Tab Atkins Jr. <jackalmage@gmail.com>
- Date: Wed, 26 Jun 2013 10:18:21 -0700
- To: Simon Sapin <simon.sapin@exyr.org>
- Cc: Simon Pieters <simonp@opera.com>, Glenn Adams <glenn@skynav.com>, "www-style@w3.org" <www-style@w3.org>
On Wed, Jun 26, 2013 at 4:22 AM, Simon Sapin <simon.sapin@exyr.org> wrote: > Le 25/06/2013 18:42, Tab Atkins Jr. a écrit : >> Instead, we can directly address this by allowing the value of a >> custom MQ to be set to a MediaList, with the meaning being that it has >> the same truth value as the contained MQs: >> >> <script> >> document.css.customMedia.set("foo", new MediaList("(foo:bar) and >> (baz:qux)")); >> </script> >> <style> >> @media "foo" { >> ... >> } >> </style> > > Why is a constructor needed instead of just a string? > > document.css.customMedia.set("foo", "(foo:bar) and (baz:qux)"); Because a custom MQ should be settable to a string as well, so you can do ("foo": "bar"), similar to existing MQs that let you test for specific values. Basically, custom MQs should be settable to booleans, strings, or numbers. Setting them to another MQ is a special form of auto-updating boolean. ~TJ
Received on Wednesday, 26 June 2013 17:19:08 UTC