Angular JS time-ago.filter.js

time-ago.filter.js

  angular.module('app')
    .filter('timeAgo', function() {
      return function(input) {
        var res = '',
          day = 24 * 60 * 60 * 1000,
          hour = 60 * 60 * 1000,
          minute = 60 * 1000,
          second = 1000,
          difference = new Date() - new Date(input);

        if (difference > day) {
          res = Math.floor(difference / day);
          res = res + ' ' + (res > 1 ? 'days' : 'day');
        } else if (difference > hour) {
          res = Math.floor(difference / hour);
          res = res + ' ' + (res > 1 ? 'hours' : 'hour');
        } else if (difference > minute) {
          res = Math.floor(difference / minute);
          res = res + ' ' + (res > 1 ? 'minutes' : 'minute');
        } else {
          res = Math.floor(difference / second);
          res = res + ' ' + (res > 1 ? 'seconds' : 'second');
        }

        return res + ' ago';
      };
    });