vue achieve copy function

vue achieve copy function

Copy () {
　　var _Input = document.createElement ( "INPUT"); // build directly INPUT 
　　_input.value = this.egc_token; // set content 
　　document.body.appendChild (_input); // add temporary instance 
　　_input.select (); // select examples of content 
　　document.execCommand ( "copy"); // perform replication 
　　alert ( 'copied successfully') 
　　document.body.removeChild (_Input); // delete temporary instance 
}