src/utils/moments.ts


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import moment from 'moment';

//A util that calculates the difference between a given time and current time
//Returns the difference in the largest possible unit of time (days > hours > minutes > seconds)

export const getTimePosted = (date_time: string) => {
  const datePosted = moment(date_time);
  const now = moment();
  var time = date_time;
  var difference = now.diff(datePosted, 'seconds');

  //Creating elapsedTime string to display to user
  // 0 to less than 1 minute
  if (difference < 60) {
    time = difference + ' seconds';
  }
  // 1 minute to less than 1 hour
  else if (difference >= 60 && difference < 60 * 60) {
    difference = now.diff(datePosted, 'minutes');
    time = difference + (difference === 1 ? ' minute' : ' minutes');
  }
  //1 hour to less than 1 day
  else if (difference >= 60 * 60 && difference < 24 * 60 * 60) {
    difference = now.diff(datePosted, 'hours');
    time = difference + (difference === 1 ? ' hour' : ' hours');
  }
  //Any number of days
  else if (difference >= 24 * 60 * 60) {
    difference = now.diff(datePosted, 'days');
    time = difference + (difference === 1 ? ' day' : ' days');
  }
  return time;
};