Bron media Eiendom
Voorbeeld
Gee terug vir watter media/toestel 'n spesifieke lêer geoptimaliseer is:
var x = document.getElementById("mySource").media;
Definisie en gebruik
Die media-eienskap stel of gee die waarde van die media-kenmerk in 'n <bron>-element terug.
Die media-kenmerk spesifiseer die tipe mediahulpbron (vir watter media/toestel die lêer geoptimaliseer is).
Die blaaier kan die media-kenmerk gebruik om te bepaal of dit die lêer kan speel of nie. As dit nie kan nie, kan dit kies om dit nie af te laai nie.
Blaaierondersteuning
| Property | |||||
|---|---|---|---|---|---|
| media | Yes | Yes | Yes | Yes | Yes |
Let wel: Die HTML media-kenmerk word egter NIE in enige van die belangrikste blaaiers ondersteun nie.
Sintaksis
Gee die media-eiendom terug:
sourceObject.media
Stel die media-eienskap:
sourceObject.media = value
Let wel: Hierdie eiendom kan verskeie waardes aanvaar.
Moontlike operateurs
| Value | Description |
|---|---|
| and | Specifies an AND operator |
| not | Specifies a NOT operator |
| , | Specifies an OR operator |
Toestelle
| Value | Description |
|---|---|
| all | Suitable for all devices. This is default |
| 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) |
Waardes
| 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)" |
Tegniese besonderhede
| Terugkeerwaarde: | 'n String, wat die ingekeep tipe van die media hulpbron verteenwoordig |
|---|
Verwante bladsye
HTML-verwysing: HTML <bron> media-kenmerk
❮ Bronvoorwerp