• Thinking about the UI\
• Functionality\
  • Add a TODO\
  • Delete a TODO\
  • check task\
  • total items count\
• Data
  • tasks - an array
  • task - {done, text, id}
• Functions (in code)\
  • addTodo\
  • deleteTodo\
  • checkTodo\
  • renderTodosList\
  • showNotification\