首先在moment中引入moment时间插件

在main.ts里面 
import moment from 'moment';
Vue.prototype.moment = moment;

然后在写过滤文件中引入moment

import moment from 'moment';
//多久之前
export const timeTransform = dateTimeStamp => {
  const minute = 1000 * 60;
  const hour = minute * 60;
  const day = hour * 24;
  const month = day * 30;
  const now = new Date().getTime();
  const diffValue = now - dateTimeStamp;
  if (diffValue < 0) {
    return;
  }

  const monthC = diffValue / month;
  const weekC = diffValue / (7 * day);
  const dayC = diffValue / day;
  const hourC = diffValue / hour;
  const minC = diffValue / minute;

  if (monthC >= 1) {
    return '' + Math.floor(monthC) + '月前';
  } else if (weekC >= 1) {
    return '' + Math.floor(weekC) + '周前';
  } else if (dayC >= 1) {
    return '' + Math.floor(dayC) + '天前';
  } else if (hourC >= 1) {
    return '' + Math.floor(hourC) + '小时前';
  } else if (minC >= 1) {
    return '' + Math.floor(minC) + '分钟前';
  } else {
    return '刚刚';
  }
};


//转换时间格式
export const dateStrToFormat = (dataStr, format = 'YYYY-MM-DD HH:mm:ss') => {
  if (!dataStr) {
    return '';
  }
  return moment(dataStr).format(format);

};


//剩余时长
export const filterRemaining = (data) => {
  const timer = new Date().getTime();
  if (!data) {
    return '';
  }
  const dayNum: number =  Math.floor ((data.disableDate - timer) / 86400000 ) ;
  let value ;
  if ( dayNum > 364) {
    value = '1年以上';
  } else {
    value = dayNum + '天' ;
  }
  // tslint:disable-next-line: radix
  return '剩余' + value + '到期';
};