<!DOCTYPE html>
<html>
<head>
<title>This tests that inline text selection can paint to subpixel position.</title>
<style>
  ::selection {
    background: rgba(255, 0, 0, 0.9);
  }

  div {
    font-size: 16px;
    width: 1px;
    height: 1px;
    position: fixed;
  }

</style>
</head>
<body>
<p id="container"></p>
<script>
  var container = document.getElementById("container");
  adjustment = 0.1;
  for (i = 0; i < 10; ++i) {
    adjustment+=0.1;
    for (j = 0; j < 10; ++j) {
      var e = document.createElement("div");
      e.style.top = (30 * i + j * adjustment) + "px";
      e.style.left = (30 * j + i * adjustment) + "px";
      e.innerHTML = "foo";
      container.appendChild(e);
    }
  }
  
  var range = document.createRange(); 
  range.selectNode(document.getElementById("container")); 
  window.getSelection().addRange(range);
</script>
</body>
</html>