格式化日期‘年月日-时分秒’方法

    formatDate: function (value) {
      let date = new Date(value);
      let y = date.getFullYear();
      let MM = date.getMonth() + 1;
      MM = MM < 10 ? ('0' + MM) : MM;
      let d = date.getDate();
      d = d < 10 ? ('0' + d) : d;
      let h = date.getHours();
      h = h < 10 ? ('0' + h) : h;
      let m = date.getMinutes();
      m = m < 10 ? ('0' + m) : m;
      let s = date.getSeconds();
      s = s < 10 ? ('0' + s) : s;
      return y + '-' + MM + '-' + d + ' ' + h + ':' + m + ':' + s;
    }