app/views/stripe/_elements.html.erb
<%= stylesheet_link_tag css_path, media: 'all' %>
<div>
<div id="card-errors">
</div>
<%= form_tag submit_path, id: "stripe-form" do %>
<% if local_assigns[:block] %>
<div id="stripe-rails-form-fields">
<%= capture(&local_assigns[:block]) %>
</div>
<% end %>
<%= label_tag :card_element, label_text %>
<div id="card-element"><!-- A Stripe Element will be inserted here. --></div>
<%= submit_tag submit_button_text %>
<% end %>
</div>
<script>
window.stripe_publishable_key = '<%= Rails.application.config.stripe.publishable_key %>'
</script>
<%= javascript_include_tag js_path, id: "stripe_elements_js" %>