这是
实验性技术
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浏览器兼容性表格
要小心谨慎在生产中使用这之前。
草案
此页面不完整。
注意： This feature is not supported by any user agent and its specifics are subject to change.
prefers-reduced-data
CSS
media feature
is used to detect if the user has requested the web content that consumes less internet traffic.
no-preference
Indicates that the user has made no preference known to the system. This keyword value evaluates as false in the boolean context.
reduce
Indicates that user has expressed the preference for lightweight alternate content.
Currently no user agent implements this feature, although various operating systems do support such preferences and if this media query is ever implemented user agents will likely rely on the settings provided by the operating system.
注意： No browser currently implements this feature so the following example will not work.
In this example the
montserrat-regular.woff2
font file will neither be preloaded nor downloaded if the user prefers reduced data, in this case the "
system font stack
" will serve as the fallback font:
<head> <link rel="preload" href="fonts/montserrat-regular.woff2" as="font" media="(prefers-reduced-data: no-preference)" crossorigin> <link rel="stylesheet" href="style.css"> </head>
@media (prefers-reduced-data: no-preference) {
@font-face {
font-family: Montserrat;
font-style: normal;
font-weight: 400;
font-display: swap;
/* latin */
src: local('Montserrat Regular'), local('Montserrat-Regular'), url('fonts/montserrat-regular.woff2') format('woff2');
unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
}
body {
font-family: Montserrat, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "Microsoft YaHei", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}
| 规范 | 状态 | 注释 |
|---|---|---|
|
Media Queries Level 5
The definition of 'reduced-data' in that specification. |
编者草案 | 初始定义。 |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
prefers-reduced-data
media feature
Experimental
|
Chrome
完整支持
85
注意事项
Disabled
|
Edge
完整支持
85
注意事项
Disabled
|
Firefox 不支持 No | IE 不支持 No | Opera 不支持 No | Safari 不支持 No |
WebView Android
不支持
No
注意事项
|
Chrome Android
完整支持
85
注意事项
Disabled
|
Firefox Android 不支持 No | Opera Android 不支持 No | Safari iOS 不支持 No | Samsung Internet Android 不支持 No |
完整支持
不支持
实验。期望将来行为有所改变。
见实现注意事项。
用户必须明确启用此特征。
Save-Data
HTTP header