gistfile1.js

import scriptjs from 'scriptjs';
const scripts = {};
const withScript = (script, Comp) => {
  class WithScript extends React.Component {
    state = {
      ready: !!scripts[script]
    };

    componentDidMount() {
      if (!this.state.ready) {
        scriptsjs.get(script, () => {
          this.setState({ready: true});
        });
      }
    }

    render () {
      return <Comp ready={this.state.ready} {...this.props} />;
    }
  }
};

// Usage
const StripeComponent = (
  '/path/to/stripe.js',
  (props) => props.ready ? <CheckoutForm /> : <span>Loading Stripe.js</span>
);

render(<StripeComponent />, document.body);