title: jQuery Select element if has specific content
body: <p>I need to select the list element that has the content "tree", this element can be in any position and the original list has a lot of results.</p>
  
  <pre><code>&lt;ul&gt;
     &lt;li&gt;House&lt;/li&gt;
     &lt;li&gt;Table&lt;/li&gt;
     &lt;li&gt;Tree&lt;/li&gt;
     &lt;li&gt;Boat&lt;/li&gt;
  &lt;/ul&gt;
  </code></pre>
  
  <p>How do I check with jquery if the <li> has the content of "tree"? If it does, I need to add a specific class to it. I know how to add the class, but I don't know how to check for the "content".</p>
  
  <p>Help?!</p>