let timestamp = Date.parse(new Date());
let date = new Date(timestamp);
let Y =date.getFullYear();
let M = (date.getMonth() + 1 < 10 ? '0' + (date.getMonth() + 1) : date.getMonth() + 1);
let D = date.getDate() < 10 ? '0' + date.getDate() : date.getDate();
let now=Y+'-'+M+'-'+D