title: how to get content of all <li> tags in one page using jquery
body: <p>I have an html list something like this:</p>
  
  <pre><code>&lt;li id="tag"&gt;red&lt;/li&gt;
  &lt;li id="tag"&gt;yellow&lt;/li&gt;
  &lt;li id="tag"&gt;blue&lt;/li&gt;
  </code></pre>
  
  <p>How can I get the content of these li tags using jQuery?</p>
  
  <p>For example;</p>
  
  <pre><code>$tags = red, yellow, blue
  </code></pre>