Javascript [Electronic resources] : The Definitive Guide (4th Edition) نسخه متنی

Availability

DOM Level 2 StyleSheets

Properties

readonly unsigned long length

The length
of the array; the number of media types in the list.

String mediaText

A
comma-separated text representation of the complete media list.
Setting this property may throw a DOMException with a
code of SYNTAX_ERR if the new
value contains a syntax err, or a code of
NO_MODIFICATION_ALLOWED_EXCEPTION if the media
list is read-only.

Methods

appendMedium( )

Adds a new media type to the end of the list.

deleteMedium( )

Removes the specified media type from the list.

item( )

Returns the media type at the specified position in the list, or
null if the index is invalid. In JavaScript, you
can also treat the MediaList object as an array and index it using
normal square-bracket array notation instead of calling this method.

Description

This interface represents a list or array of media types for a style
sheet. length specifies the number of elements in
the list, and item( ) allows a specific media type
to be retrieved by position. appendMedium( ) and
deleteMedium( ) allow entries to be appended to
and deleted from the list. JavaScript allows a MediaList object to be
treated as an array, and you can use square-bracket notation instead
of calling item( ).

The HTML 4 standard defines the following media types (they are
case-sensitive, and must be written in lowercase letters):
screen, tty,
tv, projection,
handheld, print,
braile, aural, and
all. The screen type is most
relevant to documents being displayed in web browsers on desktop or
laptop computers. The print type is used for
styles intended for printed documents.

See Also

Type of

StyleSheet.media