I'm only interested in when and on what devices the 'screen' attribute is applied to. For example this:
1) @media (max-width:632px)
2) @media screen and (max-width:632px)
I know that according to this source , 'screen' in #2 means that it applies to devices that support a screen mode, e.g. my PC would display #1 and #2 the same way.
But on what other devices would #2 also apply to? According to w3.org it says:
"Screen: intended primarily for color computer screens.".
Does this apply to handheld too? Because they've got also a screen (a small screen). w3.org even says that handhelds have 'screen' too. What about smart watches? They also got a (tiny) screen, right?
I just wonder which computer devices don't have a 'screen' and that needs CSS for formatting content. I mean visuals can only be displayed on a 'screen'. It makes the attribute seem a little bit redundant.
CSS2.1 actually has a defined handheld media type, however, it's been deprecated in Media Queries Level 4 (despite it being a draft, its use should be avoided for future compatibility). If you take a look at the way screen is defined in Level 4, it states:
'screen': Matches all devices that aren't matched by 'print' or 'speech'.
So I think internally, the drafters realize previous definitions of the types have left a lot of ambiguity as to what the media types actually apply to.