Stripe hosts the whole checkout page with this. So, you generate a link in the js client library and then redirect to it.

I've been neglecting the maintenance of the package "react-stripe-checkout" for a while and though this would be a good time to finally bring it up to date, but it appears the new version of checkout was created with a very different use case in mind. Single page, JS rendered apps don't really fit the model, and should probably use legacy Checkout or Stripe Elements.