title: Aggressive Caching: Do All Browsers Support URL Parameter for Updating?
body: <p>When aggressively caching CSS and other files, you can force the user to update to the latest version of the stylesheet by renaming the file and linking to the new copy (eg, <strong>style.123.css</strong> renamed to <strong>style.124.css</strong>). A different method often used instead of renaming the file is to pass a URL parameter, (eg, <strong>style.css?ver=123</strong> which is later changed to <strong>style.css?ver=124</strong>).</p>
  
  <p>Do all browsers support the latter method for downloading a new copy of the stylesheet? Are there any disadvantages to using the URL parameter over renaming the file?</p>