js 获取当前时间

            getNow(){
                let date = new Date();
                let y = date.getFullYear();
                let m = date.getMonth() + 1;
                let d = date.getDate();
                let H = date.getHours();
                let mm = date.getMinutes();
                let s = date.getSeconds()
                    m = m < 10 ? "0" + m : m;
                    d = d < 10 ? "0" + d : d;
                    H = H < 10 ? "0" + H : H;
                    mm = mm < 10 ? "0" + mm : mm;
                    s = s < 10 ? "0" + s : s;

                let day = y + "-" + m + "-" + d;
                let time = H + ":" + mm+":"+s;
                this.day = day;
                this.time = time;
            },