index.js

const todoList = () => {
    all = [];
    const add = (todoItem) => {
      all.push(todoItem);
    };
    const markAsComplete = (index) => {
      all[index].completed = true;
    };
 
    const overdue = () => {
      let dateToday = new Date();
      const today = formattedDate(dateToday);
      return all.filter((todo) => {
        return todo.dueDate < today;
      });
    };
 
    const dueToday = () => {
      let dateToday = new Date();
      const today = formattedDate(dateToday);
      return all.filter((todo) => {
        return todo.dueDate === today;
      });
    };
 
    const dueLater = () => {
      let dateToday = new Date();
      const today = formattedDate(dateToday);
      return all.filter((todo) => {
        return todo.dueDate > today;
      });
    };
 
    const toDisplayableList = (list) => {
      let dateToday = new Date();
      const today = formattedDate(dateToday);
      return list
        .map((todo) => {
          return `[${todo.completed ? "x" : " "}] ${todo.title} ${
            todo.dueDate !== today ? todo.dueDate : " "
          }`;
        })
        .join("\n");
    };
 
    return {
      all,
      add,
      markAsComplete,
      overdue,
      dueToday,
      dueLater,
      toDisplayableList,
    };
  };
 
  // ####################################### #
  // DO NOT CHANGE ANYTHING BELOW THIS LINE. #
  // ####################################### #
 
  const todos = todoList();
 
  const formattedDate = (d) => {
    return d.toISOString().split("T")[0];
  };
 
  var dateToday = new Date();
  const today = formattedDate(dateToday);
  const yesterday = formattedDate(
    new Date(new Date().setDate(dateToday.getDate() - 1))
  );
  const tomorrow = formattedDate(
    new Date(new Date().setDate(dateToday.getDate() + 1))
  );
 
  todos.add({ title: "Submit assignment", dueDate: yesterday, completed: false });
  todos.add({ title: "Pay rent", dueDate: today, completed: true });
  todos.add({ title: "Service Vehicle", dueDate: today, completed: false });
  todos.add({ title: "File taxes", dueDate: tomorrow, completed: false });
  todos.add({ title: "Pay electric bill", dueDate: tomorrow, completed: false });
 
  console.log("My Todo-list\n\n");
 
  console.log("Overdue");
  var overdues = todos.overdue();
  var formattedOverdues = todos.toDisplayableList(overdues);
  console.log(formattedOverdues);
  console.log("\n\n");
 
  console.log("Due Today");
  let itemsDueToday = todos.dueToday();
  let formattedItemsDueToday = todos.toDisplayableList(itemsDueToday);
  console.log(formattedItemsDueToday);
  console.log("\n\n");
 
  console.log("Due Later");
  let itemsDueLater = todos.dueLater();
  let formattedItemsDueLater = todos.toDisplayableList(itemsDueLater);
  console.log(formattedItemsDueLater);
  console.log("\n\n");