<p dir="auto">Gives an error while trying to add checked to first radio and checkbox<br>
Syntax error, unrecognized expression<br>
Syntax error, unrecognized expression</p>
<p dir="auto">code for form</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="&lt;form action=&quot;/submit-cat-photo&quot;&gt;
  &lt;label&gt;&lt;input type='radio' name='indoor-outdoor' checked&gt; Indoor&lt;/label&gt;
  &lt;label&gt;&lt;input type='radio' name='indoor-outdoor'&gt; Outdoor&lt;/label&gt;
  &lt;br&gt;
  &lt;label&gt;&lt;input type='checkbox' name='personality' checked&gt; Loving&lt;/label&gt;
  &lt;label&gt;&lt;input type='checkbox' name='personality'&gt; Lazy&lt;/label&gt;
  &lt;label&gt;&lt;input type='checkbox' name='personality'&gt; Crazy&lt;/label&gt;
  &lt;br&gt;
  &lt;input type='text' placeholder='cat photo URL' required&gt;
  &lt;button type='submit'&gt;Submit&lt;/button&gt;
&lt;/form&gt;"><pre class="notranslate"><code class="notranslate">&lt;form action="/submit-cat-photo"&gt;
  &lt;label&gt;&lt;input type='radio' name='indoor-outdoor' checked&gt; Indoor&lt;/label&gt;
  &lt;label&gt;&lt;input type='radio' name='indoor-outdoor'&gt; Outdoor&lt;/label&gt;
  &lt;br&gt;
  &lt;label&gt;&lt;input type='checkbox' name='personality' checked&gt; Loving&lt;/label&gt;
  &lt;label&gt;&lt;input type='checkbox' name='personality'&gt; Lazy&lt;/label&gt;
  &lt;label&gt;&lt;input type='checkbox' name='personality'&gt; Crazy&lt;/label&gt;
  &lt;br&gt;
  &lt;input type='text' placeholder='cat photo URL' required&gt;
  &lt;button type='submit'&gt;Submit&lt;/button&gt;
&lt;/form&gt;
</code></pre></div>
<p dir="auto">This issue is to track Syntax error popping up in the challenges.</p>