Hello, React.

% node -v                   
v15.5.0
% yarn -v
1.22.10
% npx -v
7.3.0

% npx create-react-app 0126 --typescript                                                                                                
                                                                                                                                                         
Creating a new React app in /Users/yorifuji/git/0126.                                                                                                    
                                                                                                                                                         
The --typescript option has been deprecated and will be removed in a future release.                                                                     
In future, please use --template typescript.                                                                                                             

We suggest that you begin by typing:

  cd 0126
  yarn start

Happy hacking!