title: What does the dot after dollar sign mean in jQuery when declaring variables?
body: <p>I see variables declared as:</p>
  
  <pre><code>$.root = $("body");
  </code></pre>
  
  <p>and</p>
  
  <pre><code>$root = $("body");
  </code></pre>
  
  <p>What is the difference between the two?</p>