How can I integrate react with ruby on rails 3.22 version?

I want to convert some of my rails views to react. I have tried with react on rails gem and it says it supports rails 3.x version but it uses webpacker which supports only rails 4.2+ version. I also checked react-rails but that also use webpacker gem. So cant use that as well.

Please let me know if you require any more info from my side.