NUXT_FRONTEND/plugins/timeago.js

import Vue from 'vue'
import TimeAgo from 'javascript-time-ago'
import ru from 'javascript-time-ago/locale/ru'

export default ({ app }, inject) => {
    const convertDate = (date) => {
        TimeAgo.addLocale(ru)
  
        const timeAgo = new TimeAgo('ru-RU')
        if ((date + (24*3600))* 1000 > Date.now()) {
          return timeAgo.format(date * 1000)
        } else {
          return timeAgo.format(date * 1000, 'twitter')
        }
      }
    inject('convertDate', convertDate)
}