title: Add text before or after an HTML element
body: <p>If i have an HTML element like <code>&lt;div&gt;</code> with some text inside or another elements can I add before or after this div some text data without an html element, just plain text?</p>
  
  <p>I'd like to use only pure Javascript.</p>
  
  <p>Something like :</p>
  
  <pre><code>&lt;div id="parentDiv"&gt;
     my text must be added here
    &lt;div id="childDiv"&gt;&lt;/div&gt;
  &lt;/div&gt;
  </code></pre>