Get Remaining date

RemainingDate.js

      var rem = new Date('2020-05-05') - new Date();
      var days = Math.floor(rem / 86400000);
      var hour = Math.floor((rem % 86400000)/3600000);
      var min =  Math.floor(((rem % 86400000) % 3600000) / 60000);
      var second = Math.round((((rem % 86400000) % 3600000) / 60000)/1000);

      var remaining = days + ' days ' + hour + ' hour ' + min + ' Minute ' + second + ' second.';