layout/reftests/first-line/insertion-in-first-line-12.html

   1 <!DOCTYPE html>
   2 <style>
   3   div { color: red; }
   4   div::first-line { color: green }
   5   #y { display: inline-block; }
   6 </style>
   7 <div id="x"><span id="y">green</span></div>
   8 <script>
   9   x.offsetWidth;
  10   var span = document.createElement('span');
  11   span.textContent = 'This should be ';
  12   y.insertBefore(span, y.firstChild);
  13 </script>