<script async
  src="https://js.stripe.com/v3/buy-button.js">
</script>

<stripe-buy-button
  buy-button-id="buy_btn_1Ng9YCFN5Pwa2jOw5xFswGrF"
  publishable-key="pk_live_sXJe4Ip0LDPUk7SSYHjVp4Hb"
>
</stripe-buy-button>