给自己的网站加一个复制弹窗（水印）

代码如下 👇

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/layui/2.6.8/layui.min.js"></script>
<script type="text/javascript">
/**复制自动添加版权声明*/
$(document).on("copy", function(e) {
  var selected = window.getSelection();
  var selectedText = selected.toString().replace(/\n/g, "<br>");
  var copyFooter =
      "<br>-----------------------<br>著作权归作者所有。<br>" +
      "商业转载请联系作者获得授权，非商业转载请注明出处。<br>" +
      "作者：CC-star<br> 源地址：" +
      document.location.href +
      "<br>来源：星鹿语<br>© 版权声明：本文为博主原创文章，转载请务必保留原文链接！";
  if (document.location.pathname === "/") {
    var copyFooter =
        "<br>-----------------------<br>" +
        "来源：星鹿语<br> 源地址：" +
        document.location.href +
        "<br>© 版权声明：商业转载请联系作者获得授权，非商业转载请注明出处。<br>";
  }
  var msgContent =
      '<span style="font-weight: 700;margin: 0 !important;">【星鹿语(tdcat.cn)】<br>复制成功，若要转载请务必保留原文链接</span>' + copyFooter;
  layer.msg(msgContent, {
    time: 2000,
    shift: 2,
    shade: 0.3,
    skin: "wiiuii-layer-mode"
  });
  var copyHolder = $("<div>", {
    id: "temp",
    html: selectedText + copyFooter,
    style: {
      position: "absolute",
      left: "-99999px"
    }
  });
  $("body").append(copyHolder);
  selected.selectAllChildren(copyHolder[0]);
  window.setTimeout(function() {
    copyHolder.remove();
  }, 0);
});
</script>