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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 - [Fetch API] Fetching a Blob has empty type"
   href="https://bugs.webkit.org/show_bug.cgi?id=161600">161600</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[Fetch API] Fetching a Blob has empty type
          </td>
        </tr>

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

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

        <tr>
          <th>Version</th>
          <td>Safari Technology Preview
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Macintosh
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>OS X 10.11
          </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>WebCore Misc.
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>me&#64;bowlingx.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>I'm not sure if this is a possible duplicate with 161228, but found in Safari Technology Preview v 12.
When trying to fetch a blob with the fetch API, the content type is empty:

Test-Case: <a href="https://jsfiddle.net/LL5trcfz/3/">https://jsfiddle.net/LL5trcfz/3/</a></pre>
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