概述
CSS animation-timing-function属性定义CSS动画在每一动画周期中执行的节奏。
可能值为一或多个 <timing-function>
。
对于关键帧动画来说,timing function作用于一个关键帧周期而非整个动画周期,即从关键帧开始开始,到关键帧结束结束。
定义于一个关键帧区块的缓动函数(animation timing function)应用到改关键帧;另外,若该关键帧没有定义缓动函数,则使用定义于整个动画的缓动函数。
/* Keyword values */
animation-timing-function: ease;
animation-timing-function: ease-in;
animation-timing-function: ease-out;
animation-timing-function: ease-in-out;
animation-timing-function: linear;
animation-timing-function: step-start;
animation-timing-function: step-end;
/* Function values */
animation-timing-function: cubic-bezier(0.1, 0.7, 1.0, 0.1);
animation-timing-function: steps(4, end);
animation-timing-function: frames(10);
/* Multiple animations */
animation-timing-function: ease, step-start, cubic-bezier(0.1, 0.7, 1.0, 0.1);
/* Global values */
animation-timing-function: inherit;
animation-timing-function: initial;
animation-timing-function: unset;
通常用animation
简写定义整个动画属性更为方便。
初始值 | ease |
---|---|
适用元素 | all elements, ::before and ::after pseudo-elements |
是否是继承属性 | 否 |
适用媒体 | visual |
计算值 | as specified |
Animation type | discrete |
正规顺序 | the unique non-ambiguous order defined by the formal grammar |
语法
值
<timingfunction>
- 每个
<timing-function>
代表了应用于动画的timing function,定义于animation-property
.
正式语法
<timing-function>#where
<timing-function> = linear | <cubic-bezier-timing-function> | <step-timing-function>
where
<cubic-bezier-timing-function> = ease | ease-in | ease-out | ease-in-out | cubic-bezier(<number>, <number>, <number>, <number>)
<step-timing-function> = step-start | step-end | steps(<integer>[, <step-position>]?)where
<step-position> = jump-start | jump-end | jump-none | jump-both | start | end
示例
规范
规范 | 状态 | 备注 |
---|---|---|
CSS Animations animation-timing-function |
Working Draft |
浏览器兼容性
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
animation-timing-function | Chrome
Full support
43
| Edge
Full support
12
| Firefox
Full support
16
| IE Full support 10 | Opera
Full support
30
| Safari
Full support
9
| WebView Android
Full support
43
| Chrome Android
Full support
43
| Firefox Android
Full support
16
| Opera Android
Full support
30
| Safari iOS
Full support
9
| Samsung Internet Android
Full support
4.0
|
jump- keywords for steps() | Chrome Full support 77 | Edge No support No | Firefox Full support 65 | IE No support No | Opera No support No | Safari No support No | WebView Android Full support 77 | Chrome Android Full support 77 | Firefox Android Full support 65 | Opera Android No support No | Safari iOS No support No | Samsung Internet Android No support No |
Legend
- Full support
- Full support
- No support
- No support
- User must explicitly enable this feature.
- User must explicitly enable this feature.
- Requires a vendor prefix or different name for use.
- Requires a vendor prefix or different name for use.