selection-range-3

<!doctype html>
<body>
<p id="p">Example: <i>italic</i> and <b>bold</b></p>

<script>
  let range = new Range();

  range.setStart(p.firstChild, 2);
  range.setEnd(p.querySelector('b').firstChild, 3);

  alert(range); // ample: italic and bol

  // 使用此范围进行选择
  window.getSelection().addRange(range);
</script>
</body>