I have been running a command to turn .jsx files into .js files one at a time:

npx babel App.jsx --out-file App.js --plugins=@babel/plugin-transform-react-jsx

I want to do it for everything in a directory. I read through the help command's options and it seems like I should be able to do this

npx babel -d mydirectory -x .jsx  --plugins=@babel/plugin-transform-react-jsx

But that says it requires filenames, despite providing a directory.

What's the right syntax to get this to work?