title: regular expression except pattern
body: <p>Lets say I have multiple css files.</p>
  
  <pre><code>bear.css
  cat.css
  styles.css
  colors.css
  ... multiptle different css files 
  </code></pre>
  
  <p>I would like to select all the files except the bear.css and cat.css
  Look around operation might be work but I could not make it work</p>
  
  <p>Condition is like if((pattern != bear.css &amp;&amp; pattern != cat.css) &amp;&amp; .css))</p>
  
  <p>I need to add the regex to   test: /.css$/, which is webpack css loader config </p>