gistfile1.txt

# in template

  <%= form_tag subscription_path, id: 'payment-form' %>
  <script>
    $(function() {
      var handler = StripeCheckout.configure({
        key: "<%= Rails.configuration.stripe[:publishable_key] %>",
        token: function(token, args) {
          var form = $("#payment-form");
          form.append("<input type='hidden' name='stripe_token' value='" + JSON.stringify(token) + "'/>");
          form.get(0).submit();
        }
      });

      $('.paymentButton').click(function(e) {
        // Open Checkout with further options
        handler.open({
          name: 'Subscription',
          description: 'Starter Plan ($20.00)',
          amount: 2000
        });
        e.preventDefault();
      });
    })
  </script>

# in controller

Stripe::Customer.create(
  card: JSON.parse(params[:stripe_token]),
  plan: :starter,
  email: current_user.email
)