Internet Explorer 11 wobbly CSS3 animation

Question

Please refer to this fiddle: http://jsfiddle.net/eQegA/3/

<div class="spinner"></div>

.spinner {
    width: 100px;
    height: 100px;
    border: 50px solid blue;
    /*border-top-color: #fff;
    border-bottom-color: #fff;*/ /* commented out to see the wobble better */
    border-radius: 200px;    

    -webkit-animation: application-loading-rotate 1s;
    animation: application-loading-rotate 1s;
    -webkit-animation-iteration-count: infinite;
    animation-iteration-count: infinite;
    -webkit-animation-timing-function: linear;
    animation-timing-function: linear;
}

@-webkit-keyframes application-loading-rotate {
  from {
    -webkit-transform: rotate(0deg);
  }
  to {
    -webkit-transform: rotate(360deg);
  }
}
@keyframes application-loading-rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

In Google Chrome the rotation is stable, however for some reason in IE11 there is a noticable "wobble" of the circle as it rotates.

Any ideas why it wobbles so? Is there any way to fix it in IE11?

Answer 1

For what it's worth, it also occurs on other browsers. It has to do, how the border is drawn, it's not a perfect round. As far as I know, there isn't a quick fix for this. However you can draw the border as a background image.

.spinner {
display:block;
    width: 200px;
    height: 200px;
    border-radius: 100%;
    background-image:url(http://www.clipartbest.com/cliparts/9iR/RyK/9iRRyKLie.png);
    background-size:100%;

    -webkit-animation: application-loading-rotate 1s;
    animation: application-loading-rotate 1s;
    -webkit-animation-iteration-count: infinite;
    animation-iteration-count: infinite;
    -webkit-animation-timing-function: linear;
    animation-timing-function: linear;
}

@-webkit-keyframes application-loading-rotate {
  from {
    -webkit-transform: rotate(0deg);
  }
  to {
    -webkit-transform: rotate(360deg);
  }
}
@keyframes application-loading-rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

See: http://jsfiddle.net/eQegA/26/