Website written using ReactJs is not working on Iphones

I developed a website which was build using ReactJs library. I tried deploying on Heroku when there was no logic only markup and css and everything was fine. But when all logic was completed website stopped working on Iphones for some reason(all the modern browsers). All I am getting is white, blank page. And there is no errors in Sentry. On the other hand site perfectly works on Android devices. Any help would help