This is sample React application from React tutorial.
Install the latest version of NodeJS to create a new project. Delete all files in the "src" and "public" folders and replace with source files from this project. Run the server locally on port 3000. Execute the following commands via terminal:
npm install -g create-react-app
create-react-app tictactoe
cd tictactoe
npm start
Visit http://localhost:3000/ in your browser or check out the demo.