example: Add Stripe embedded Checkout example

examples/with-stripe-typescript/app/actions/stripe.ts

@@ -2,14 +2,21 @@
 
 import type { Stripe } from "stripe";
 
-import { redirect } from "next/navigation";
 import { headers } from "next/headers";
 
 import { CURRENCY } from "@/config";
 import { formatAmountForStripe } from "@/utils/stripe-helpers";
 import { stripe } from "@/lib/stripe";
 
-export async function createCheckoutSession(data: FormData): Promise<void> {
+export async function createCheckoutSession(
+  data: FormData,
+): Promise<{ client_secret: string | null; url: string | null }> {
+  const ui_mode = data.get(
+    "uiMode",
+  ) as Stripe.Checkout.SessionCreateParams.UiMode;
+
+  const origin: string = headers().get("origin") as string;
+
   const checkoutSession: Stripe.Checkout.Session =
     await stripe.checkout.sessions.create({
       mode: "payment",
@@ -29,13 +36,20 @@ export async function createCheckoutSession(data: FormData): Promise<void> {
           },
         },
       ],
-      success_url: `${headers().get(
-        "origin",
-      )}/donate-with-checkout/result?session_id={CHECKOUT_SESSION_ID}`,
-      cancel_url: `${headers().get("origin")}/donate-with-checkout`,
+      ...(ui_mode === "hosted" && {
+        success_url: `${origin}/donate-with-checkout/result?session_id={CHECKOUT_SESSION_ID}`,
+        cancel_url: `${origin}/donate-with-checkout`,
+      }),
+      ...(ui_mode === "embedded" && {
+        return_url: `${origin}/donate-with-embedded-checkout/result?session_id={CHECKOUT_SESSION_ID}`,
+      }),
+      ui_mode,
     });
 
-  redirect(checkoutSession.url as string);
+  return {
+    client_secret: checkoutSession.client_secret,
+    url: checkoutSession.url,
+  };
 }
 
 export async function createPaymentIntent(

examples/with-stripe-typescript/app/components/CheckoutForm.tsx

@@ -1,5 +1,7 @@
 "use client";
 
+import type Stripe from "stripe";
+
 import React, { useState } from "react";
 
 import CustomDonationInput from "@/components/CustomDonationInput";
@@ -8,12 +10,22 @@ import StripeTestCards from "@/components/StripeTestCards";
 import { formatAmountForDisplay } from "@/utils/stripe-helpers";
 import * as config from "@/config";
 import { createCheckoutSession } from "@/actions/stripe";
+import getStripe from "@/utils/get-stripejs";
+import {
+  EmbeddedCheckout,
+  EmbeddedCheckoutProvider,
+} from "@stripe/react-stripe-js";
+
+interface CheckoutFormProps {
+  uiMode: Stripe.Checkout.SessionCreateParams.UiMode;
+}
 
-export default function CheckoutForm(): JSX.Element {
+export default function CheckoutForm(props: CheckoutFormProps): JSX.Element {
   const [loading] = useState<boolean>(false);
   const [input, setInput] = useState<{ customDonation: number }>({
     customDonation: Math.round(config.MAX_AMOUNT / config.AMOUNT_STEP),
   });
+  const [clientSecret, setClientSecret] = useState<string | null>(null);
 
   const handleInputChange: React.ChangeEventHandler<HTMLInputElement> = (
     e,
@@ -23,26 +35,48 @@ export default function CheckoutForm(): JSX.Element {
       [e.currentTarget.name]: e.currentTarget.value,
     });
 
+  const formAction = async (data: FormData): Promise<void> => {
+    const uiMode = data.get(
+      "uiMode",
+    ) as Stripe.Checkout.SessionCreateParams.UiMode;
+    const { client_secret, url } = await createCheckoutSession(data);
+
+    if (uiMode === "embedded") return setClientSecret(client_secret);
+
+    window.location.assign(url as string);
+  };
+
   return (
-    <form action={createCheckoutSession}>
-      <CustomDonationInput
-        className="checkout-style"
-        name="customDonation"
-        min={config.MIN_AMOUNT}
-        max={config.MAX_AMOUNT}
-        step={config.AMOUNT_STEP}
-        currency={config.CURRENCY}
-        onChange={handleInputChange}
-        value={input.customDonation}
-      />
-      <StripeTestCards />
-      <button
-        className="checkout-style-background"
-        type="submit"
-        disabled={loading}
-      >
-        Donate {formatAmountForDisplay(input.customDonation, config.CURRENCY)}
-      </button>
-    </form>
+    <React.Fragment>
+      <form action={formAction}>
+        <input type="hidden" name="uiMode" value={props.uiMode} />
+        <CustomDonationInput
+          className="checkout-style"
+          name="customDonation"
+          min={config.MIN_AMOUNT}
+          max={config.MAX_AMOUNT}
+          step={config.AMOUNT_STEP}
+          currency={config.CURRENCY}
+          onChange={handleInputChange}
+          value={input.customDonation}
+        />
+        <StripeTestCards />
+        <button
+          className="checkout-style-background"
+          type="submit"
+          disabled={loading}
+        >
+          Donate {formatAmountForDisplay(input.customDonation, config.CURRENCY)}
+        </button>
+      </form>
+      {clientSecret ? (
+        <EmbeddedCheckoutProvider
+          stripe={getStripe()}
+          options={{ clientSecret }}
+        >
+          <EmbeddedCheckout />
+        </EmbeddedCheckoutProvider>
+      ) : null}
+    </React.Fragment>
   );
 }

examples/with-stripe-typescript/app/donate-with-checkout/page.tsx

@@ -3,15 +3,15 @@ import type { Metadata } from "next";
 import CheckoutForm from "@/components/CheckoutForm";
 
 export const metadata: Metadata = {
-  title: "Donate with Checkout | Next.js + TypeScript Example",
+  title: "Donate with hosted Checkout | Next.js + TypeScript Example",
 };
 
 export default function DonatePage(): JSX.Element {
   return (
     <div className="page-container">
-      <h1>Donate with Checkout</h1>
+      <h1>Donate with hosted Checkout</h1>
       <p>Donate to our project 💖</p>
-      <CheckoutForm />
+      <CheckoutForm uiMode="hosted" />
     </div>
   );
 }

examples/with-stripe-typescript/app/donate-with-embedded-checkout/page.tsx

@@ -0,0 +1,17 @@
+import type { Metadata } from "next";
+
+import CheckoutForm from "@/components/CheckoutForm";
+
+export const metadata: Metadata = {
+  title: "Donate with embedded Checkout | Next.js + TypeScript Example",
+};
+
+export default function DonatePage(): JSX.Element {
+  return (
+    <div className="page-container">
+      <h1>Donate with embedded Checkout</h1>
+      <p>Donate to our project 💖</p>
+      <CheckoutForm uiMode="embedded" />
+    </div>
+  );
+}

examples/with-stripe-typescript/app/donate-with-embedded-checkout/result/error.tsx

@@ -0,0 +1,5 @@
+"use client";
+
+export default function Error({ error }: { error: Error }) {
+  return <h2>{error.message}</h2>;
+}

examples/with-stripe-typescript/app/donate-with-embedded-checkout/result/layout.tsx

@@ -0,0 +1,18 @@
+import type { Metadata } from "next";
+
+export const metadata: Metadata = {
+  title: "Checkout Session Result",
+};
+
+export default function ResultLayout({
+  children,
+}: {
+  children: React.ReactNode;
+}): JSX.Element {
+  return (
+    <div className="page-container">
+      <h1>Checkout Session Result</h1>
+      {children}
+    </div>
+  );
+}

examples/with-stripe-typescript/app/donate-with-embedded-checkout/result/page.tsx

@@ -0,0 +1,28 @@
+import type { Stripe } from "stripe";
+
+import PrintObject from "@/components/PrintObject";
+import { stripe } from "@/lib/stripe";
+
+export default async function ResultPage({
+  searchParams,
+}: {
+  searchParams: { session_id: string };
+}): Promise<JSX.Element> {
+  if (!searchParams.session_id)
+    throw new Error("Please provide a valid session_id (`cs_test_...`)");
+
+  const checkoutSession: Stripe.Checkout.Session =
+    await stripe.checkout.sessions.retrieve(searchParams.session_id, {
+      expand: ["line_items", "payment_intent"],
+    });
+
+  const paymentIntent = checkoutSession.payment_intent as Stripe.PaymentIntent;
+
+  return (
+    <>
+      <h2>Status: {paymentIntent.status}</h2>
+      <h3>Checkout Session response:</h3>
+      <PrintObject content={checkoutSession} />
+    </>
+  );
+}

examples/with-stripe-typescript/app/page.tsx

@@ -9,12 +9,21 @@ export const metadata: Metadata = {
 export default function IndexPage(): JSX.Element {
   return (
     <ul className="card-list">
+      <li>
+        <Link
+          href="/donate-with-embedded-checkout"
+          className="card checkout-style-background"
+        >
+          <h2 className="bottom">Donate with embedded Checkout</h2>
+          <img src="/checkout-one-time-payments.svg" />
+        </Link>
+      </li>
       <li>
         <Link
           href="/donate-with-checkout"
           className="card checkout-style-background"
         >
-          <h2 className="bottom">Donate with Checkout</h2>
+          <h2 className="bottom">Donate with hosted Checkout</h2>
           <img src="/checkout-one-time-payments.svg" />
         </Link>
       </li>

examples/with-stripe-typescript/package.json

@@ -6,13 +6,13 @@
     "start": "next start"
   },
   "dependencies": {
-    "@stripe/react-stripe-js": "2.1.1",
-    "@stripe/stripe-js": "1.54.1",
+    "@stripe/react-stripe-js": "2.4.0",
+    "@stripe/stripe-js": "2.2.2",
     "next": "latest",
     "react": "18.2.0",
     "react-dom": "18.2.0",
     "server-only": "0.0.1",
-    "stripe": "12.14.0"
+    "stripe": "14.8.0"
   },
   "devDependencies": {
     "@types/node": "20.4.6",