title: JQuery get the rest of the element's class name that starts with string "whatever-"
body: <p>I have js that caches classes that's name starts with "whatever-",</p>
  
  <pre><code>$('[class^="whatever-"], [class*=" whatever-"]')
  </code></pre>
  
  <p>but what I want now to do is get the rest of the name, for example in case of "whatever-9" I want to get "9", I don't know how to do it, can you help me?</p>