选择所有使用target="_blank"的a元素 - 在线编辑器

          <!DOCTYPE html>
<html>
<head>
  <style>
    a[target=_blank] {
      background-color: yellow;
    }
  </style>
</head>
<body>

  <p>The link with target="_blank" gets a yellow background:</p>

  <a href="https://www.mifengjc.com">mifengjc.com</a>
  <a href="http://www.disney.com" target="_blank">disney.com</a>
  <a href="http://www.wikipedia.org" target="_top">wikipedia.org</a>

  <p><b>Note:</b> For [<i>attribute</i>] to work in IE8 and earlier, a DOCTYPE must be declared.</p>
</body>
</html>
        