time-ago.js

const RESOLUTIONS = [
  {text: 'year',    short: 'y',   get: (d) => d.getFullYear(),  set: (d, v) => d.setFullYear(v) },
  {text: 'month',   short: 'm',   get: (d) => d.getMonth(),     set: (d, v) => d.setMonth(v)    },
  {text: 'day',     short: 'd',   get: (d) => d.getDate(),      set: (d, v) => d.setDate(v)     },
  {text: 'hour',    short: 'h',   get: (d) => d.getHours(),     set: (d, v) => d.setHours(v)    },
  {text: 'minute',  short: 'mi',  get: (d) => d.getMinutes(),   set: (d, v) => d.setMinutes(v)  }
];
class DateHelper {

  timeAgoInWords(date1, {brief, skip, limit} = {}) {
    const d2 = new Date(); // now
    const d1 = new Date(date1);
    const hi = new Date(Math.max(d1, d2));
    const lo = new Date(Math.min(d1, d2));
    if(!Array.isArray(skip)){
      skip = [skip];
    }
    const res = RESOLUTIONS.reduce(({r, rest}, curr) => {
      if(skip.includes(curr.text) || skip.includes(curr.short)) {
        return {r, rest};
      }
      let diff = curr.get(rest) - curr.get(lo);
      if(diff > 0) {
        r.push(diff + (!!brief ? curr.short : curr.text));
      }
      curr.set(rest, curr.get(lo));
      console.debug(curr.text, r, rest);
      return {r, rest: rest};
    },{r: [], rest: hi});

    if(limit > 0) {
      if(limit < res.r.length) {
        return '~' + res.r.slice(0, limit).join(!!brief ? '': ' ')
      } else {
        return res.r.slice(0, limit).join(!!brief ? '': ' ')
      }
    } else {
      return res.r.join(!!brief ? '': ' ');
    }
  }


}

const dateHelper = new DateHelper();
export default dateHelper;