vue 回车登录功能

created() {
        let _self = this;
        document.onkeydown = function(e) {
            let key = window.event.keyCode;
            if (key == 13 || key == 100) {
                if (_self.activeName == "login") {
                    _self.submitLogin();   //登录方法
                } else {
                    _self.submitRegister();  //注册方法
                }
            }
        };
},