title: Avoid bundled jquery in Yii
body: <p>I read a book called "Yii Application development cookbook" which has a chapter that includes these lines: </p>
  
  <blockquote>
    <p>"Sometimes, you need to suppress including a bundled jQuery. For
    example, if your project code relies on version specific
    functionality. ..."</p>
  </blockquote>
  
  <p>Can you help me understand the two questions below:</p>
  
  <ol>
  <li><p>What exactly is "bundled jQuery" (My first understanding is that it's just some javascript code using jQuery framework. I'm not sure whether I'm right or not)</p></li>
  <li><p>What is the author's purpose when he writes "relies on version specific functionality", does he mean to force Yii application to use only one version of jQuery and not upgrade to the most latest if it becomes obsolete?</p></li>
  </ol>
  
  <p>Many thanks!</p>