添加微信

  <script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script>   
    <script src="https://cdn.jsdelivr.net/clipboard.js/1.5.12/clipboard.min.js"></script>  
        微信号：<span id="target">xyz2018</span>
        <button class="btn" data-clipboard-action="copy" data-clipboard-target="#target" id="copy_btn">    
            点击复制    
        </button> 
        <script>    
                $(document).ready(function(){       
                    var clipboard = new Clipboard('#copy_btn');    
                    clipboard.on('success', function(e) {    
                        alert("微信号复制成功",1500); 
                        window.location.href='weixin://';
                        e.clearSelection();    
                        console.log(e.clearSelection);    
                    });    
                });    
            </script>