Source mediaProperty

Source 对象参考手册Source Object

Examples

Returns what media/device the specified file is optimized for:

var x = document.getElementById("mySource").media;

xThe output result is:

screen and (min-width:320px)

Try it yourself »

Definition and Usage

The media property sets or returns the value of the media attribute in <source>.

The media attribute specifies the type of media resource (what media/device the file is optimized for).

The browser uses the media attribute to determine whether it can play the file. If it cannot, it may choose not to download the file.

Note:The <source> element is new in HTML5.


Browser Support

Internet ExplorerFirefoxOperaGoogle ChromeSafari

All major browsers support the media property.

Note:Almost all major browsers do not support the media attribute.


Syntax

Return the media property:

sourceObject.media

Set the media property:

sourceObject.media=value

Note:This property can accept multiple values.

Possible Operators

Value Description
and Specifies an AND operator.
not Specifies a NOT operator.
, Specifies an OR operator.

Devices

Value Description
all Default. Applies to all devices.
aural Speech synthesizers.
braille Braille feedback devices.
handheld Handheld devices (small screens, limited bandwidth).
projection Projectors.
print Print preview mode / printed pages.
screen Computer screens.
tty Teletypewriters and similar media that use monospaced character grids.
tv Television-type devices (low resolution, limited scrolling capability).

Value

Value Description
width Specifies the width of the target display area.
The "min-" and "max-" prefixes can be used.
Example: media="screen and (min-width:500px)"
height Specifies the height of the target display area.
The "min-" and "max-" prefixes can be used.
Example: media="screen and (max-height:700px)"
device-width Specifies the width of the target display/paper.
The "min-" and "max-" prefixes can be used.
Example: media="screen and (device-width:500px)"
device-height Specifies the height of the target display/paper.
The "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 target display area.
The "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.
The "min-" and "max-" prefixes can be used.
Example: media="screen and (aspect-ratio:16/9)"
color Specifies the bits/color of the target display.
The "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.
The "min-" and "max-" prefixes can be used.
Example: media="screen and (min-color-index:256)"
monochrome Specifies the bits/pixel in a monochrome frame buffer.
The "min-" and "max-" prefixes can be used.
Example: media="screen and (monochrome:2)"
resolution Specifies the pixel density of the target display/paper (dpi or dpcm).
The "min-" and "max-" prefixes can be used.
Example: media="print and (resolution:300dpi)"
scan Specifies the scanning method of tv displays.
Possible values: "progressive" and "interlace".
Example: media="tv and (scan:interlace)"
grid Specifies whether the output device is a grid or bitmap.
Possible values: "1" for grid, otherwise "0".
Example: media="handheld and (grid:1)"

Technical Details

Return value: A string representing the type of media resource.


Related Articles

HTML Reference Manual:HTML <source> media attribute


Source 对象参考手册Source Object

Other Extensions