HTML+JS实现简单点击复制文字（含多行）功能

点击复制单行文字

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>

<body>
<span id="biao1">这里是被复制的内容</span>
        <input type="button" onClick="copyUrl2()" value="点击复制"  class="btn btn-success btn-sm"/>
</body>
<script type="text/javascript">
    
    function copyUrl2()
        {
            var Url2=document.getElementById("biao1").innerText;
            var oInput = document.createElement('input');
            oInput.value = Url2;
            document.body.appendChild(oInput);
            oInput.select(); // 选择对象
            document.execCommand("Copy"); // 执行浏览器复制命令
            oInput.className = 'oInput';
            oInput.style.display='none';
            alert('复制成功');
            window.location.href="weixin://";//打开微信
        }
    </script>
</html>

点击复制多行

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>

<body>
        <a href="javascript:void(0);" onClick="copyContent()"  class="btn btn-success btn-sm"/>点击复制</a>
</body>
<script type="text/javascript">
function copyContent() {
      var name = '标题：南京大学在职本科、学历/学位2021春季班招生'  + " n";
      var url = '原文链接：http://www.baidu.com/html/zsxx/2020/1126/670.html'  + " n";
      var form = '出处：学友圈'  + " n";
      var content = name.concat(url, form); 
      // 使用textarea支持换行，使用input不支持换行
      const textarea = document.createElement('textarea');
      textarea.value = content;
      document.body.appendChild(textarea);
 
      textarea.select();
      if (document.execCommand('copy')) {
        document.execCommand('copy');
        //alert(content);
		alert("复制成功");
      }
      document.body.removeChild(textarea);
    }
</script>	
</html>

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