update
CSS
media feature
can be used to test how frequently (if at all) the output device is able to modify the appearance of content.
update
feature is specified as a single keyword value chosen from the list below.
none
Once it has been rendered, the layout can no longer be updated. Example: documents printed on paper.
slow
The layout may change dynamically according to the usual rules of CSS, but the output device is not able to render or display changes quickly enough for them to be perceived as a smooth animation. Examples: e-book readers or severely underpowered devices.
fast
<p>If this text animates for you, you are using a fast-updating device.</p>
@keyframes jiggle {
from {
transform: translateY(0);
}
to {
transform: translateY(25px);
}
}
@media (update: fast) {
p {
animation: 1s jiggle linear alternate infinite;
}
}
| 规范 | 状态 | 注释 |
|---|---|---|
|
Media Queries Level 4
The definition of 'update' in that specification. |
候选推荐 | 初始定义。 |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
update
media feature
|
Chrome 不支持 No | Edge 不支持 No | 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 | Chrome Android 不支持 No | 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 |
不支持