animation-timing-function:指定动画速度曲线。
速度曲线定义动画从一套 CSS 样式变为另一套所用的时间。
速度曲线用于使变化更为平滑。
默认值: | ease |
---|---|
继承: | no |
版本: | CSS3 |
JavaScript 语法: | object object.style.animationTimingFunction="linear" |
animation-timing-function: linear|ease|ease-in|ease-out|cubic-bezier(n,n,n,n);
值 | 描述 | 测试 |
---|---|---|
linear | 动画从开始到结束具有相同的速度。 | 测试 |
ease | 动画有一个缓慢的开始,然后快,结束慢。 | 测试 |
ease-in | 动画有一个缓慢的开始。 | 测试 |
ease-out | 动画结束缓慢。 | 测试 |
ease-in-out | 动画具有缓慢的开始和慢的结束。 | 测试 |
cubic-bezier(n,n,n,n) | 在立方贝塞尔函数中定义速度函数。 可能的值是从0到1的数字值。 |
提示: 请试着在下面的"尝试一下"功能中使用不同的值。
从开始到结束以相同的速度播放动画:
animation-timing-function:linear;
-webkit-animation-timing-function:linear; /* Safari and Chrome */
在此页底部有更多的例子。
为了更好地理解不同的定时函数值,这里提供了设置五个不同值的五个不同的 div 元素:
/* W3C and Opera: */
#div1 {animation-timing-function: linear;}
#div2 {animation-timing-function: ease;}
#div3 {animation-timing-function: ease-in;}
#div4 {animation-timing-function: ease-out;}
#div5 {animation-timing-function: ease-in-out;}
/* Firefox: */
#div1 {-moz-animation-timing-function: linear;}
#div2 {-moz-animation-timing-function: ease;}
#div3 {-moz-animation-timing-function: ease-in;}
#div4 {-moz-animation-timing-function: ease-out;}
#div5 {-moz-animation-timing-function: ease-in-out;}
/* Safari and Chrome: */
#div1 {-webkit-animation-timing-function: linear;}
#div2 {-webkit-animation-timing-function: ease;}
#div3 {-webkit-animation-timing-function: ease-in;}
#div4 {-webkit-animation-timing-function: ease-out;}
#div5 {-webkit-animation-timing-function: ease-in-out;}
与上例相同,但是通过 cubic-bezier 函数来定义速度曲线:
/* W3C and Opera: */
#div1 {animation-timing-function: cubic-bezier(0,0,1,1;}
#div2 {animation-timing-function: cubic-bezier(0.25,0.1,0.25,1);}
#div3 {animation-timing-function: cubic-bezier(0.42,0,1,1);}
#div4 {animation-timing-function: cubic-bezier(0,0,0.58,1);}
#div5 {animation-timing-function: cubic-bezier(0.42,0,0.58,1);}
/* Firefox: */
#div1 {-moz-animation-timing-function: cubic-bezier(0,0,1,1;}
#div2 {-moz-animation-timing-function: cubic-bezier(0.25,0.1,0.25,1);}
#div3 {-moz-animation-timing-function: cubic-bezier(0.42,0,1,1);}
#div4 {-moz-animation-timing-function: cubic-bezier(0,0,0.58,1);}
#div5 {-moz-animation-timing-function: cubic-bezier(0.42,0,0.58,1);}
/* Safari and Chrome: */
#div1 {-webkit-animation-timing-function: cubic-bezier(0,0,1,1;}
#div2 {-webkit-animation-timing-function: cubic-bezier(0.25,0.1,0.25,1);}
#div3 {-webkit-animation-timing-function: cubic-bezier(0.42,0,1,1);}
#div4 {-webkit-animation-timing-function: cubic-bezier(0,0,0.58,1);}
#div5 {-webkit-animation-timing-function: cubic-bezier(0.42,0,0.58,1);}
属性 | |||||
---|---|---|---|---|---|
animation-timing-function | 43.0 4.0 -webkit- | 10.0 | 16.0 5.0 -moz- | 9.0 4.0 -webkit- | 30.0 15.0 -webkit- 12.0 -o- |
CSS3 tutorial: CSS3 动画
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