CSS animation do not work for svg in

问题

I am trying to animate an SVG in image/object tag but it is not working

svg {
  width: 100%;
  height: 200px;
}

.rotate-45 {
  transform-origin: center;
  transform: rotate(45deg);
}

.rotate {
  transform-origin: center;
  animation: rotate 1s ease-in-out infinite;
}

.rotate-back {
  transform-origin: center;
  animation: rotate 1s ease-in-out infinite;
  animation-direction: alternate;
}

.left {
  animation: move 1s ease-in-out infinite;
}

.right {
  animation: move 1s ease-in-out infinite;
}

@keyframes rotate {
  100% {
    transform: rotate(calc(90deg + 45deg));
  }
}

@keyframes move {
  50% {
    transform: translate(-30px, -30px);
  }
}

 <svg width="100%" height="100%" viewBox="0 0 1000 1000" xmlns="http://www.w3.org/2000/svg" version="1.1" xmlns:xlink="http://www.w3.org/1999/xlink">
    <g transform="translate(500,500)">
      <rect class="rotate-45 rotate-back" x="-5" y="-5" width="10" height="10" stroke="#00a99d" stroke-width="20" fill="none" />
      <rect class="rotate-45 rotate" x="-50" y="-50" width="100" height="100" stroke="#00a99d" stroke-width="20" stroke-linejoin="bevel" fill="none" />
      <g transform="translate(-50,0) rotate(-45)">
        <polyline class="left" points="40,-40 50,-50 -40,-50 -50,-40 -50,50 -40,40" stroke="#00a99d" stroke-width="20" fill="none" />
      </g>
      <g transform="translate(50,0) rotate(135)">
        <polyline class="right" points="40,-40 50,-50 -40,-50 -50,-40 -50,50 -40,40" stroke="#00a99d" stroke-width="20" fill="none" />
      </g>
      <text y="-140" text-anchor="middle" font-weight="bold" font-size="3em" font-family="sans-serif">loading data...</text>
    </g>
  </svg>

How to animate the SVG inside the image tag along side with CSS

Here is a plunker for that code https://plnkr.co/edit/TdfR7cpVaQArtcUs0Hro?p=preview

回答1:

You can't animate the internals of an <img> from the outside. Even if it is an SVG. There are two reasons for this:

CSS doesn't apply across document boundaries, and
Images referenced via an <img> must be self contained.

Animations should work if you put the CSS inside the external SVG (in a <style> element as normal).

Note also that you will need to change the way you do transform-origin. The way it works in Chrome is convenient, but it is wrong according to the current spec. It won't work on other browsers like Firefox.

<svg width="100%" height="100%" viewBox="0 0 1000 1000" xmlns="http://www.w3.org/2000/svg" version="1.1" xmlns:xlink="http://www.w3.org/1999/xlink">
  <style>
.rotate-45 {
  transform-origin: 0px 0px;
  transform: rotate(45deg);
}

.rotate {
  transform-origin: 0px 0px;
  animation: rotate 1s ease-in-out infinite;
}

.rotate-back {
  transform-origin: 0px 0px;
  animation: rotate 1s ease-in-out infinite;
  animation-direction: alternate;
}

.left {
  animation: move 1s ease-in-out infinite;
}

.right {
  animation: move 1s ease-in-out infinite;
}

@keyframes rotate {
  100% {
    transform: rotate(135deg);
  }
}

@keyframes move {
  50% {
    transform: translate(-30px, -30px);
  }
}
  </style>
  <g transform="translate(500,500)">
    <rect class="rotate-45 rotate-back" x="-5" y="-5" width="10" height="10" stroke="#00a99d" stroke-width="20" fill="none"/>
    <rect class="rotate-45 rotate" x="-50" y="-50" width="100" height="100" stroke="#00a99d" stroke-width="20" stroke-linejoin="bevel" fill="none"/>
    <g transform="translate(-50,0) rotate(-45)"><polyline class="left" points="40,-40 50,-50 -40,-50 -50,-40 -50,50 -40,40" stroke="#00a99d" stroke-width="20" fill="none"/></g>
    <g transform="translate(50,0) rotate(135)"><polyline class="right" points="40,-40 50,-50 -40,-50 -50,-40 -50,50 -40,40" stroke="#00a99d" stroke-width="20" fill="none"/></g>
    <text y="-140" text-anchor="middle" font-weight="bold" font-size="3em" font-family="sans-serif">loading data...</text>
  </g>
</svg>

回答2:

You can use <?xml-stylesheet href="style.css" type="text/css"?> if you dont want to have to embed it for img tags to work. The above code will work in an object tag

If you want img tags to work do what Kaiido suggested and embed it.

来源：https://stackoverflow.com/questions/46050871/css-animation-do-not-work-for-svg-in-img

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