This project is building a stateful class component. It allows users to add their to-do things, mark completed things and remove them.

• Default: there are two default to-do, it's removable
• Add todo: an input box at right bar allows you add things, hit "Add Todo", you can see your todo shows at the center
• Completed: click the todo card you just created, you'll see the the card was been marked with a line
• Clear: you can clear your completed todo by clicking "Clear Completed" at right bar

• You can check my deployment Here.(https://react-todo-j9x5od9yq.now.sh/).