Make ToDoList using vanillaJS

1. 12hour-clock to 24hour-clock toggle menu.
2. Different greeting message based on current time.
3. User login function.
4. Todolist.
5. Todolist drag-and-drop function.
6. Font color and background color custumizizing.
   

• Consecutive empty-username login submits make error. Input value doesn't change into empty string. And typing something after empty-username login submit, error message occurs.
  

  • Issue solved: By using keydown eventListener

• When setting only one color among font-color and background-color, the other color value is saved as undefined.
  

  • Issue solved: By saving current font-color and background-color, if those color aren't saved when setting colors.

• When deleting todo after drag-and-drop, deleting todo doesn't work. After drag-and-drop, delete event listener moves from delete button to input time tooltip
  

  • Issue solved: By setting event listener to delete button on drag end event.