Widget:ProjectLabel

<script> function appStart(){ if(pageParams["page"]){ mw.loader.using(['mediawiki.api', 'jquery']).then(()=>{ new mw.Api().get({

   action: 'query',
   prop: 'revisions',
   rvprop: 'content',
   titles: pageParams["page"],
   format: 'json'

}).done(function (pageData) {

   var pageId = Object.keys(pageData.query.pages)[0];
   var content = pageData.query.pages[pageId].revisions[0]['*'];
   var pageUrl = mw.util.getUrl(pageParams["page"]);

   const regex = /\[\[Category:(.*?)\]\]/gi;
   let cats = content.match(regex);
   cats.map(match => /\[\[Category:(.*?)\]\]/i.exec(match));
   console.log(cats);

}); }); } }

if(!window.widgets) window.widgets = []; window.widgets.push(appStart); </script>