Javascript如何获取带有字体系列的选定文本

var selectedText = window.getSelection();

var range = selectedText.getRangeAt(0);

var tempDiv = document.createElement('div');
tempDiv.appendChild(range.cloneContents());

var font = window.getComputedStyle(tempDiv).fontFamily;

function getSelectedTextFont() {
  var selectedText = window.getSelection();
  var range = selectedText.getRangeAt(0);
  var tempDiv = document.createElement('div');
  tempDiv.appendChild(range.cloneContents());
  var font = window.getComputedStyle(tempDiv).fontFamily;
  return font;
}

var selectedFont = getSelectedTextFont();
console.log(selectedFont);