media

source - Media query of the resource's intended media; this should be used only in a <picture> element. style - This attribute defines which media the style should apply to. Its value is a media query, which defaults to all if the attribute is missing. link - This attribute specifies the media which the linked resource applies to. Its value must be a media query. This attribute is mainly useful when linking to external stylesheets by allowing the user agent to pick the best adapted one for the device it runs on.

Usage note:

• In HTML 4, this can only be a simple white-space-separated list of media description literals, i.e., media types and groups, where defined and allowed as values for this attribute, such as print, screen, aural, braille. HTML5 extended this to any kind of media queries, which are a superset of the allowed values of HTML 4.
• Browsers not supporting the CSS3 Media Queries won't necessarily recognize the adequate link; do not forget to set fallback links, the restricted set of media queries defined in HTML 4. area - A hint of the media for which the linked resource was designed, for example print and screen. If omitted, it defaults to all. Use this attribute only if the href attribute is present.