MediaWiki:Gadget-purgetab.js

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Note - After saving, you may have to bypass your browser's cache to see the changes. Mozilla / Firefox / Safari: hold Shift while clicking Reload, or press either Ctrl-F5 or Ctrl-R (Command-R on a Macintosh); Konqueror: click Reload or press F5; Opera: clear the cache in Tools → Preferences; Internet Explorer: hold Ctrl while clicking Refresh, or press Ctrl-F5.

/* 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', '*');
});
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