Template:ExportCSV

<button onclick="(function(btn){

 var container = btn.parentElement;
 var tbl = container.nextElementSibling;
 while(tbl && tbl.tagName !== 'TABLE') tbl = tbl.nextElementSibling;
 if(!tbl){ alert('Table not found'); return; }
 var rows = tbl.querySelectorAll('tr');
 var csv = [];
 rows.forEach(function(row){
   var cells = row.querySelectorAll('th, td');
   var line = [];
   cells.forEach(function(cell){
     var txt = cell.innerText.replace(/

/g,' ').trim();

     if(txt.indexOf(',') !== -1 || txt.indexOf('"') !== -1) txt = '"' + txt.replace(/"/g,'""') + '"';
     line.push(txt);
   });
   if(line.length) csv.push(line.join(','));
 });
 var blob = new Blob([csv.join('

')], {type:'text/csv'});

 var a = document.createElement('a');
 a.href = URL.createObjectURL(blob);
 a.download = (document.title.replace(/ - .*/,).trim().replace(/ /g,'_') || 'export') + '.csv';
 document.body.appendChild(a); a.click(); document.body.removeChild(a);

})(this)" style="cursor:pointer; background:#2a2a2a; color:#e07000; border:1px solid #e07000; border-radius:4px; padding:4px 12px; font-size:0.85em; font-weight:bold;">⬇ Export CSV</button>

Usage

Place {{ExportCSV}} immediately before any wikitable to add a CSV export button above it.

The button reads the next <table> element in the DOM and downloads it as a .csv file named after the page title.