Listing 6-49: Filtering the Reminders List

function filterList(reminders,selectedFilter){
      if (selectedFilter === "all"){
          return reminders;
      } else {

      let numberOfDays;

      switch(selectedFilter){
            case "2day":
              numberOfDays = 2;
              break;
            case "1week":
              numberOfDays = 7;
              break;
            case "30days":
              numberOfDays = 30;
              break;
            default:
              numberOfDays = 0;
              break;
      }

      const result = reminders.filter(reminder=>{
          const todaysDate = new Date().toISOString().substr(0,10);
          const todayTime = new Date(todaysDate).getTime();
          const dueTime = new Date(reminder.dueDate).getTime();
          return dueTime < (todayTime + (numberOfDays * 86400000));
      });
      return result;
    }
  }