This is a test to check which of the CSS
are supported by the browser.
The modes should be mutually exclusive: in compliant browsers, only one of the media types should be supported at one time. It is interesting to try "print preview" mode.
handheld media type is rare these days, and deprecated.
It has been supported by several browsers on smart phones.
It was part of the 2012 CSS3 spec:
It looks like it is set to be deprecated:
Media Queries Level 4: W3C Working Draft (but it also says all the media
types will eventually be deprecated.)
Here is another set of tests:
Test of support for CSS Media types.
Opera Mobile 11.10 has 2 modes "single column" or the default.
In single column mode, it supports only
handheld, otherwise only
Checked in Android.
Opera Mini v. 6 – 22 has a mode: "Mobile view", on or off.
If this mode is on,
handheld is supported,
Checked in Symbian and Android.
The browser distributed with Nokia Symbian phones always supports
handheld only, although in that mode it also supports CSS2
The default Android browser (the Google browser) reacts well to the
HandheldFriendly meta-tag in HTML. If it has the content "true",