title: Resizing SVG Circle Radius Using CSS Animation
body: <p>I'm trying to animate an SVG circle's radius attribute with CSS. Whilst (using the Firefox Inspect Element tool) I can see that the animation itself is setup and running correctly, the size of the ".innerCircle" doesn't visibly change.</p>
  
  <p>If you can spot anything that I've obviously missed, or help in any way I'd be greatly appreciative. I'm rather new to this, so if I have gone about this wrong, please be kind!</p>
  
  <p>I've pasted my files underneath for reference.</p>
  
  <p>Thanks again.</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>@keyframes buttonTransition {
    from {
      r: 5%;
    }
    to {
      r: 25%;
    }
  }
  
  .innerCircle {
    animation-duration: 1s;
    animation-iteration-count: infinite;
    animation-name: buttonTransition;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;html&gt;
    &lt;head&gt;
      &lt;link href = "styling.css" rel = "stylesheet" type = "text/css"&gt;&lt;/link&gt;
    &lt;/head&gt;
    &lt;body&gt;
      &lt;svg class = "button" expanded = "true" height = "100px" width = "100px"&gt;
        &lt;circle cx = "50%" cy = "50%" r = "35%" stroke = "#000000" stroke-width = "10%" fill = "none"/&gt;
        &lt;circle class = "innerCircle" cx = "50%" cy = "50%" r = "25%" fill = "#000000"/&gt;
      &lt;/svg&gt;
    &lt;/body&gt;
  &lt;/html&gt;</code></pre>
  </div>
  </div>
  </p>