title: How to make the iframe block requests from certain domains?
body: <p>Is there an attribute for iframes that will make it block requests to certain domains? Something like the following:</p>
  <pre><code>&lt;iframe src=&quot;www.example.com&quot; block-domains=&quot;google.com&quot;&gt;&lt;/iframe&gt;
  </code></pre>
  <p>So if <code>block-domains</code> is that magical attribute I'm looking for, it's telling the iframe to block all requests to <code>google.com</code>.</p>