This project builds on create-react-app framework.

Update

Add onClick to the button in TodoForm.js

Merge TodoList and DoneList into List

Change the way state updated:

this.setState(preState => ({
    todoItems: ...
    doneItems: ...
}))

Function

Type your task and enter (or click Add), your task will hang in "Scheduled".

Click a task in "Scheduled" and it will be moved to "Completed".

Click a task in "Completed" then it will be removed.

TodoApp
    TodoForm 
    TodoList
        ListItem 1
        ListItem 2
        ...
    DoneList
        ListItem 3
        ListItem 4
        ...