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      <base href="https://bugs.webkit.org/" />
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Multiple selectors break keyframes animation"
   href="https://bugs.webkit.org/show_bug.cgi?id=158199">158199</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Multiple selectors break keyframes animation
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>Other
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>iOS 9.3
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>CSS
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>matthew&#64;salsitasoft.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>I am using CSS code like the following:

&#64;keyframes foo {
  0% {
    transform: scale(0.3);
    opacity: 1;
  }
  50% {
    transform: scale(1);
    opacity: 0;
  }
  100% {
    transform: scale(2);
    opacity: 0;
  }
}

This works fine, but when run through css-nano, some selectors are combined as so:

&#64;keyframes foo {
  0% {
    transform: scale(0.3);
    opacity: 1;
  }
  50% {
    transform: scale(1);
  }
  50%,to {
    opacity: 0;
  }
  to {
    transform: scale(2);
  }
}

Looks like in this case the opacity rule is applied to 50% but not to 100%. This appears to work fine in other browsers I tested.</pre>
        </div>
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