nodejs 模块moment格式化时间，获取当前时间的前一天时间

var moment = require('moment');

 moment.locale('zh-cn');
  var today = {};
  var _today = moment();
  today.year = _today.format('yyyy'); /*现在的年*/
  today.date = _today.format('YYYY-MM-DD'); /*现在的时间*/
  today.yesterday = _today.subtract(1, 'days').format('YYYY-MM-DD'); /*前一天的时间*/

  var formatDate = moment(12345678977).format('YYYY-MM-DD HH:mm:ss'); /*格式化时间*/