title: Add input to form using JS
body: <p>It's possible to add inputs that are created dynamically by the user to a form?</p>
  
  <p>Let's say I have this when the page loads:</p>
  
  <pre><code>&lt;form id="my-form" xl-form&gt;
  ... // here the inputs
  &lt;/form&gt;
  </code></pre>
  
  <p>And after that, I create an input (after the page loads) </p>
  
  <pre><code>&lt;input type="input" class="integr_elements" placeholder="name" id="name"&gt;
  </code></pre>
  
  <p>How can I add it inside the form that has "my-form" as id?
  I need to add it inside because i want to use a GitHub plugin that will affect only the inputs that are inside the 
  form.</p>
  
  <p>Is this possible?</p>
  
  <p>Thanks!</p>
  
  <p>PS: Before posting this, searched on the forum but found 2013 post and seems there are some deprecated ways.</p>