SOURCE

console 命令行工具 X clear 

                    

                        
>

                        
                    

                

            

            
console

            
alertify
  .closeLogOnClick(true)
  .log("单击关闭");

            
<script src="http://cdn.bootcss.com/alertifyjs-alertify.js/1.0.10/js/alertify.js"></script>