Is there an official style guide or naming convention for React based projects?

I'm setting up a React project with my team that will use mobX as state manager, plus TypeScript.

I've seen a common pattern in the casing and naming patterns in React Projects:

1. Non-React Folders and Files: camelCase or kebab-case
2. React (inside components folder): PascalCase

Is there a formal convention for folder/file naming in react? If not, is there a style guide on which this pattern is based? Or a reason why this one is used most of the times?

from Is there an official style guide or naming convention for React based projects?