How to detect if a site loads React

I recently needed a way to figure out if React was being loaded on various different pages of a site. The first script I found didn't work, which basically looked to see if React was attached to the window object.

However, I did find this script that does work.

if (
  Array.from(document.querySelectorAll("*")).some(
    (e) => e._reactRootContainer !== undefined
  )
) {
  console.log("React.js");
}

What it can't determine is if there are multiple versions of React running on a page, which is something I would like to be able to detect, if that makes sense. Is that possible?