title: How to add more value to existing class (wordpress)?
body: <p>I need to add 'wsqmylogin' to existing class.<br>
  I trired the following codes, but they all don't add it.<br>
  Would you please let me know how to solve this problem?<br><br>
  Existing Code (created by plugin YITH):<br></p>
  <pre><code>&lt;form id=&quot;yith-ywraq-default-form&quot;&gt;
       &lt;p class=&quot;form-row &quot; id=&quot;message_field&quot; data-priority=&quot;&quot;&gt;
            &lt;textarea name=&quot;message&quot; class=&quot;input-text &quot; id=&quot;message&quot; placeholder=&quot;&quot;&gt;&lt;/textarea&gt;
      &lt;/p&gt;
  &lt;/form&gt;
  </code></pre>
  <p><br>I tried:<br></p>
  <pre><code>jQuery('#yith-ywraq-default-form #message_field textarea[class=&quot;input-text&quot;]').each(function()
  { this.setAttribute('class', 'wsqmylogin'); });
  </code></pre>
  <br>
  <pre><code>jQuery(&quot;#yith-ywraq-default-form #message_field textarea&quot;).prop(&quot;classs&quot;,&quot;wsqmylogin&quot;);
  </code></pre>
  <br>
  <pre><code>jQuery(&quot;#yith-ywraq-default-form #message_field  .input-text&quot;).prop(&quot;wsqmylogin&quot;)
  </code></pre>
  <br>
  <p>Thank you.</p>