stripe-ssr.js

class App extends React.Component {
  constructor() {
    super();
    this.state = {stripe: null};
  }
  componentDidMount() {
    // Create Stripe instance in componentDidMount
    // (componentDidMount only fires in browser/DOM environment)
    this.setState({stripe: window.Stripe('pk_test_12345')});
  }
  render() {
    return (
      <StripeProvider stripe={this.state.stripe}>
        <Elements>
          <InjectedCheckoutForm />
        </Elements>
      </StripeProvider>
    );
  }
}