text: export const timeDifference = (current, previous) => {
      var msPerMinute = 60 * 1000;
      var msPerHour = msPerMinute * 60;
      var msPerDay = msPerHour * 24;
      var msPerMonth = msPerDay * 30;
      var msPerYear = msPerDay * 365;
  
      var elapsed = current - previous;
  
      if (elapsed < msPerMinute) {
          return Math.round(elapsed/1000) + ' seconds ago';   
      }
      else if (elapsed < msPerHour) {
          return Math.round(elapsed/msPerMinute) + ' minutes ago';   
      }
      else if (elapsed < msPerDay ) {
          return Math.round(elapsed/msPerHour ) + ' hours ago';   
      }
      else if (elapsed < msPerMonth) {
          return Math.round(elapsed/msPerDay) + ' days ago';   
      }
      else if (elapsed < msPerYear) {
          return Math.round(elapsed/msPerMonth) + ' months ago';   
      }
      else {
          return 'approximately ' + Math.round(elapsed/msPerYear ) + ' years ago';   
      }
  };