[db48x]

I don't work at Facebook, but I don't think that's intended primarily as an obfuscation step. Instead it's a _compilation_ step. It ensures that css rules for widget X can't accidentally apply to and therefore break break widget Y.

But yes, it is effectively obfuscated, and it would be foolish to try to reverse-engineer it every time the identifiers change, since they're effectively random.

[stratenjine]

Actually, I've built a side project/POC, to check if the concept works, 6 months ago.

Recently I picked it up and continued. Selectors still valid.

Just sayin :)