HTML and CSS Reference
In-Depth Information
You may find the other types useful in niche projects. For example, if
you're designing slides for distribution on the Web after your presenta-
tion, then you may have a presentation specifically targeting projected
media (which is triggered in Opera's full-screen mode). For more on this
idea, as well as information on Opera's support of the
projection
media
type, read Till Halbach's article “Creating Presentations/Slideshows with
HTML & CSS” at
http://dev.opera.com/articles/view/html-css-slideshows/
.
You can specify the media type associated with a block of CSS rules in
three ways: through the
media
attribute on the HTML
<style>
or
<link>
element, as a parameter for the
@import
rule, or as a parameter on the
@media
rule.
media
HTML Attribute
The HTML
<link>
element and the
<style>
element have a
media
attri-
bute that accepts a comma-separated list of media types. The source file
linked to or the code in that
<style>
block will be ignored if the device
used to visit the page is of a type not listed as one of the values. In the
case of the
<link>
element, this means that the linked file may not be
downloaded, saving bandwidth.
<html>
<head>
<!-- stylesheets for all media -->
<link rel=”stylesheet” type=”text/css” src=”global1.css”>
<link rel=”stylesheet” type=”text/css”
media=”all”
➥
src=”global2.css”>
<style type=”text/css”>[...]</style>
<style type=”text/css”
media=”all”
>[...]</style>
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