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.
if ((mw.config.get('wgAction') == 'view' || mw.config.get('wgAction') == 'purge') && mw.config.get('wgNamespaceNumber') >=0)
addOnloadHook(function edittop_hook(){
 var h2s = document.getElementsByTagName('H2');
 var h2 = h2s[0];
 if (!h2) return;
 if (h2.parentNode.id == 'toctitle') h2 = h2s[1];
 if (!h2) return;
 var span = h2.firstChild;
 if (!span || span.className != 'editsection') return;
 var zero = span.cloneNode(true);
 if (document.getElementById('featured-star')) zero.style.marginRight = '25px';
 if (document.getElementById('spoken-icon')) zero.style.marginRight = '45px';
 if (document.getElementById('protected-icon') && zero.style.marginRight) zero.style.marginRight = '70px';
 var parent = document.getElementsByTagName('H1')[0];
 parent.insertBefore(zero, parent.firstChild);
 var a = zero.getElementsByTagName('A')[0];
 if (a.href.indexOf('&section=T') == -1){
   a.title = a.title.replace(/:.*$/,': 0')
   a.setAttribute('href', a.href.replace(/&section=\d+/,'&section=0'));
 }else{//transcluded
   a.title = 'Edit section: 0'
   a.setAttribute('href', mw.config.get('wgScript')+'?title='+encodeURIComponent(mw.config.get('wgPageName'))+'&action=edit&section=0')
 }
})