MediaWiki:Gadget-purgetab.js

Note: After saving, you have to bypass your browser's cache to see the changes. Google Chrome, Firefox, Microsoft Edge and Safari: Hold down the ⇧ Shift key and click the Reload toolbar button. For details and instructions about other browsers, see Wikipedia:Bypass your cache.

/* Purge caption button */
addOnloadHook(function () {
   var hist; var url;
   if (!(hist = document.getElementById('ca-history') )) return;
   if (!(url = hist.getElementsByTagName('a')[0] )) return;
   if (!(url = url.href )) return;
   addPortletLink('p-cactions', url.replace(/([?&]action=)history([&#]|$)/, '$1purge$2'),
                  '*', 'ca-purge', 'Purge cache', '*');
});