If you create a React file but save it with `.js` extension, then GitHub code highlighting breaks when it reaches a single quote in text. Saving the same file in `.jsx` works fine.

See example on [this repo](https://github.com/ktalebian/react-highlighting-problem). Both file `correct-highlighting.jsx` and `incorrect-highlighting.js` have the same content. As you can, the `.js` has wrong syntax highlighting.

Is there anyway to fix this, while still using `.jx` extension?