Simple example of js formatting time

Date.prototype.format = function(format) { //author: meizz
 let o = {
 "M+": this.getMonth() + 1, //月份
 "d+": this.getDate(), //日
 "H+": this.getHours(), //小时
 "m+": this.getMinutes(), //分
 "s+": this.getSeconds(), //秒
 "q+": Math.floor((this.getMonth() + 3) / 3), //季度
 "f+": this.getMilliseconds() //毫秒
 };
 if (/(y+)/.test(format))
 format = format.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
 for (let k in o)
 if (new RegExp("(" + k + ")").test(format))
  format = format.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
 return format;
};
var d=new Date();
d.format('yyyy/MM/dd HH:mm');
//"2016/11/25 10:01"