first-letter-contributed-to-ancestor.html (351B)
1 <!DOCTYPE html> 2 <link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1495811"> 3 <style> 4 math { 5 display: inline-block; 6 } 7 math::first-letter { 8 background-color: blue; 9 } 10 </style> 11 <math> 12 <mo id="mo">%</mo> 13 </math> 14 <script> 15 mo.appendChild(document.createTextNode("A")); 16 document.body.innerText += ""; 17 </script>