获取系统时间，放到html里

let myDate = new Date(); //获得当前时间let h = myDate.getHours();h < 10 ? h = '0' + h : h = h;let m = myDate.getMinutes();m < 10 ? m = '0' + m : m = m;let s = myDate.getSeconds();s < 10 ? s = '0' + s : s = s;$(".msgtime:first").html(h + ':' + m + ':' + s); //放到html里