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One, media type
1, link method introduced
<rel=type=href=media="print"/>
2, the introduction of XML method
<?xml-stylesheet rel= "stylesheet" media= "screen" href= "Css/style.css"? >
3. Introduction of @import method
@import introduced in two ways, one is to call a style file through @import in the style file, and the other way is to introduce it in <style>...</style> in
Another style file is called in the style file:
@url ("css/reset.css") screen; @URL ("css/print.css") print; Called in <style>...</style> in
<head> <type="text/css" >@url (</</head>
4, @media introduced
This type of introduction is the same as @import, and there are two ways:
Used in style files:
@Media screen{ selector { Property: property value; } } Called in <style>...</style> in
<head> <type="text/css" >@Media screen{selector </</Head > The above methods have their own pros and cons, in practical applications I suggest using the first and fourth, because these two methods are commonly used in project production methods.
Second, media features (medium Query)
As mentioned earlier, media query is an enhanced version of media type CSS3, in fact, you can think of media query as a media type (judging condition) +CSS (conditional style rules), commonly used features are listed in 13. Refer to: Media features for more details. To get a better understanding of media Query, we go back to the previous instance:
<rel=media=href="small.css"/>
The syntax for converting to CSS is:
@600px) { { attribute: property value; } } In fact, the style in the Small.css file is placed in the @media Srceen and (max-width;600px) {...} Curly braces. In the statement structure above the statement, you can see that the media query and CSS Properties collection are similar, the main differences are:
1, Media query accepts only a single logical expression as its value, or no value;
2, CSS property is used to declare how to represent the information of the page, while media query is an expression used to determine whether the output device satisfies a certain condition;
3. Media query Most of these accept the Min/max prefix, which is used to represent their logical relationship, and to indicate a condition that is greater than or equal to or less than or equal to a value
4, CSS properties require that property values must be, Media query can have no value, because its expression returns only true or False two
Common Media Query is shown in the following table:
Compatible Browsers:
One, max width max
<rel=media=href=type="text/css"/>
The above indicates that when the screen is less than or equal to 600px, the Web page is rendered in the Small.css style.
Second, min width min
<rel=media=href=type="text/css"/>
The above indicates that when the screen is greater than or equal to 900px, the Web page is rendered in the Big.css style.
Three, multiple media queries use
<rel=media=href=type="text/css"/>
Media query can combine multiple media queries, in other words, a media query can contain between 0 and more expressions, and the expression can contain between 0 and more keywords, as well as a media Type. As it says above, when the screen is between 600px-900px, the STYLE.CSS style is used to render the Web page.
Iv. output width of device screen
<rel=media=href=type="text/css"/>
The above code refers to the IPHONE.CSS style for the maximum device width of 480px, such as the display on the iphone, where Max-device-width refers to the actual resolution of the device, that is, the visual area resolution
Wu, IPhone4
<rel=media=type=href="iphone4.css"/>
The above style is written specifically for IPhone4 mobile devices.
VI. IPad
<rel=media=href=type=<rel=media=href=type="Text/css"/ >
In the case of large numbers, the mobile device on the ipad is the same as on the iphone, but the difference is that the ipad declares a different direction, such as the above example, in Portrait (portrait) Use PORTRAIT.CSS to render the page, and use LANDSCAPE.CSS to render the page in landscape (landscape).
Vii. Android
Width of/*240px */<LinkRel="Stylesheet"Media="Only screen and (max-device-width:240px)"href="Android240.css"type= "Text/css"/>/*360px width */< link rel= "stylesheet" Media= "only screen and (min-device-width:241px) and (max-device-width:360px)" href=" android360.css "type=" Text/css "/>/*480px Width */<link rel= "stylesheet" media= "only screen and ( min-device-width:361px) and (max-device-width:480px) "href=" Android480.css "type=" Text/css "/>
We can use media query to provide specific styles for Android phones at different resolutions, so that the screen resolution can be resolved differently for Android phone page refactoring issues.
Eight, not keyword
<rel=media=href=type="text/css"/>
The NOT keyword is used to exclude a certain type of media, in other words, to exclude devices that match an expression.
Nine, only keyword
<rel=media=href=type="text/css"/>
Only used to set a specific media type that can be used to exclude browsers that do not support media queries. In fact, only many times it is used to hide style sheets for devices that do not support media query but support media type. The main features are: devices that support media Queries, the normal invocation style, when only does not exist, and for devices that do not support media features (media Queries) but that support the medium type, which will not read the style, Because its first reads only instead of screen, and the browser does not support media qqueries, the style will not be adopted, whether or not it supports only.
X. Other
If media Type is not explicitly specified in media query, it defaults to all, such as:
<rel=media=href=type="text/css"/>
There is also a comma (,) that is used to denote a juxtaposition or representation or, as follows
<rel=type=href=media="handheld and (max-width:480px), screen and (min-width:960px) "/>
The style.css style in the code above is used on a handheld device with a width less than or equal to 480px, or on a device with a screen width greater than or equal to 960px.
The section on the use of Media query is described here, and in the end the overall regulation of its function, the personal think is a word:Media queries can use different styles under different conditions, use the page to achieve different rendering effect.
Reprinted from: Http://www.w3cplus.com/content/css3-media-queries
css3-Media Type
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