js 时间类型格式化

注：非原著  属于借鉴

Date.prototype.format = function(format) {
        var date = {
          "M+": this.getMonth() + 1,
          "d+": this.getDate(),
          "h+": this.getHours(),
          "m+": this.getMinutes(),
          "s+": this.getSeconds(),
          "q+": Math.floor((this.getMonth() + 3) / 3),
          "S+": this.getMilliseconds()
        };
        if (/(y+)/i.test(format)) {
          format = format.replace(RegExp.$1, (this.getFullYear() + '').substr(4 - RegExp.$1.length));
        }
        for (var k in date) {
          if (new RegExp("(" + k + ")").test(format)) {
            format = format.replace(RegExp.$1, RegExp.$1.length == 1 ? date[k] : ("00" + date[k]).substr(("" + date[k]).length));
          }
        }
        return format;
      }

 var time =new Date().format('yyyy-MM-dd hh:ss:mm');
time ：2019-09-06 16:57:38