参考地址：https://segmentfault.com/a/11...
demo地址：http://codepen.io/JimmyVV/pen...
单独访问没问题，只要放进项目，第一次报错，复制不成功，第二次之后就可以了

// 复制链接地址并关闭分享且提醒
    var aEle = document.querySelector('#copy');
        aEle.addEventListener('click',function(){
            var copyDOM = document.querySelector('#selector');
            var range = document.createRange();  
              range.selectNode(copyDOM);
              window.getSelection().addRange(range);
              var successful = document.execCommand('copy');  
              try {  
                // Now that we've selected the anchor text, execute the copy command  
                
                var msg = successful ? 'successful' : 'unsuccessful';  
                console.log('Copy email command was ' + msg);  
              } catch(err) {  
                console.log('Oops, unable to copy');  
              }

              // Remove the selections - NOTE: Should use
              // removeRange(range) when it is supported  
              window.getSelection().removeAllRanges();  
        },false);