HTML <a>メディア属性
例
メディア属性を持つリンク:
<a href="att_a_media.asp?output=print"
media="print and (resolution:300dpi)">
Open media attribute page for print.</a>
定義と使用法
このmedia
属性は、リンクされたドキュメントが最適化されるメディアまたはデバイスを指定します。
この属性は、ターゲットURLが特殊なデバイス(iPhoneなど)、音声、または印刷メディア用に設計されていることを指定するために使用されます。
この属性は、いくつかの値を受け入れることができます。
href
属性が存在する場合にのみ使用されます。
注:この属性は純粋に助言です。
ブラウザのサポート
Element | |||||
---|---|---|---|---|---|
media | Yes | Yes | Yes | Yes | Yes |
構文
<a media="value">
可能な演算子
Value | Description |
---|---|
and | Specifies an AND operator |
not | Specifies a NOT operator |
, | Specifies an OR operator |
デバイス
Value | Description |
---|---|
all | Default. Suitable for all devices |
aural | Speech synthesizers |
braille | Braille feedback devices |
handheld | Handheld devices (small screen, limited bandwidth) |
projection | Projectors |
Print preview mode/printed pages | |
screen | Computer screens |
tty | Teletypes and similar media using a fixed-pitch character grid |
tv | Television type devices (low resolution, limited scroll ability) |
値
Value | Description |
---|---|
width | Specifies the width of the targeted display area. "min-" and "max-" prefixes can be used. Example: media="screen and (min-width:500px)" |
height | Specifies the height of the targeted display area. "min-" and "max-" prefixes can be used. Example: media="screen and (max-height:700px)" |
device-width | Specifies the width of the target display/paper. "min-" and "max-" prefixes can be used. Example: media="screen and (device-width:500px)" |
device-height | Specifies the height of the target display/paper. "min-" and "max-" prefixes can be used. Example: media="screen and (device-height:500px)" |
orientation | Specifies the orientation of the target display/paper. Possible values: "portrait" or "landscape" Example: media="all and (orientation: landscape)" |
aspect-ratio | Specifies the width/height ratio of the targeted display area. "min-" and "max-" prefixes can be used. Example: media="screen and (aspect-ratio:16/9)" |
device-aspect-ratio | Specifies the device-width/device-height ratio of the target display/paper. "min-" and "max-" prefixes can be used. Example: media="screen and (aspect-ratio:16/9)" |
color | Specifies the bits per color of target display. "min-" and "max-" prefixes can be used. Example: media="screen and (color:3)" |
color-index | Specifies the number of colors the target display can handle. "min-" and "max-" prefixes can be used. Example: media="screen and (min-color-index:256)" |
monochrome | Specifies the bits per pixel in a monochrome frame buffer. "min-" and "max-" prefixes can be used. Example: media="screen and (monochrome:2)" |
resolution | Specifies the pixel density (dpi or dpcm) of the target display/paper. "min-" and "max-" prefixes can be used. Example: media="print and (resolution:300dpi)" |
scan | Specifies scanning method of a tv display. Possible values are "progressive" and "interlace". Example: media="tv and (scan:interlace)" |
grid | Specifies if the output device is grid or bitmap. Possible values are "1" for grid, and "0" otherwise. Example: media="handheld and (grid:1)" |
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