css - 为什么这个 CSS 动画在 IE10 中不起作用？

Question

This JSFiddle包含一个 CSS 动画，适用于 Chrome、Firefox 和 Safari，但不适用于 IE 10。我知道 IE 10 doesn't need -ms- 前缀，所以不可能。我看不出有什么问题:

@keyframes snapVertical {
  0% { background-position: 0 0; }
  16% { background-position: 0 0; }
  21% { background-position: 0 -136px; }
  37% { background-position: 0 -136px; }
  42% { background-position: 0 -272px; }
  58% { background-position: 0 -272px; }
  63% { background-position: 0 -136px; }
  79% { background-position: 0 -136px; }
  84% { background-position: 0 0; }
  100% { background-position: 0 0; }
}
.animation-snap-vertical {
  animation: snapVertical 4s cubic-bezier(0.165, 0.840, 0.440, 1.000) 0s infinite;
}

为什么这在 IE 10 中不起作用？

编辑

为什么水平的有效，而垂直的无效(fiddle)？

横向动画:

@keyframes snapHorizontal {
  0% { background-position: 0 0; }
  16% { background-position: 0 0; }
  21% { background-position: -176px 0; }
  37% { background-position: -176px 0; }
  42% { background-position: -352px 0; }
  58% { background-position: -352px 0; }
  63% { background-position: -176px 0; }
  79% { background-position: -176px 0;}
  84% { background-position: 0 0; }
  100% { background-position: 0 0; }
}
.animation-snap-horizontal {
  animation: snapHorizontal 4s cubic-bezier(0.165, 0.840, 0.440, 1.000) 0s infinite;
}

Answer 1

它看起来像是 IE 中的错误(请参阅 similar SO question)。为了解决这个问题，我只是将初始和最终偏移量更改为 0.1px 而不是 0。这似乎已经解决了问题。解决方案代码(jsfiddle):

@keyframes snapVertical {
  0% { background-position: 0 0.1px; }
  16% { background-position: 0 0.1px; }
  21% { background-position: 0 -136px; }
  37% { background-position: 0 -136px; }
  42% { background-position: 0 -272px; }
  58% { background-position: 0 -272px; }
  63% { background-position: 0 -136px; }
  79% { background-position: 0 -136px; }
  84% { background-position: 0 0.1px; }
  100% { background-position: 0 0.1px; }
}
.animation-snap-vertical {
  animation: snapVertical 4s cubic-bezier(0.165, 0.840, 0.440, 1.000) 0s infinite;
}