// 样式:2021-06-30 18:15:50
function getNowTime() {
let t = new Date();
let fn1 = (d) => ('0'+d).substr(-2);
let date = t.getFullYear()+'-'+fn1(t.getMonth()+1)+'-'+fn1(t.getDate()); //2021-06-30
let time = t.toLocaleTimeString('chinese', { hour12: false }); //18:15:50
return date + " " + time
}