chore: add vercel example

.prettierignore

@@ -6,3 +6,5 @@ node_modules/
 docs/
 .yarn
 coverage
+.next
+.vscode

package.json

@@ -7,7 +7,8 @@
     "packages/sdk/server-node",
     "packages/sdk/cloudflare",
     "packages/sdk/cloudflare/example",
-    "packages/sdk/vercel"
+    "packages/sdk/vercel",
+    "packages/sdk/example-vercel"
   ],
   "private": true,
   "scripts": {

packages/sdk/vercel/example-vercel/.gitignore

@@ -0,0 +1,36 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# local env files
+.env*.local
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts
+.vscode

packages/sdk/vercel/example-vercel/README.md

@@ -0,0 +1,30 @@
+# Example test app for Vercel LaunchDarkly SDK
+
+This is an example test app to showcase the usage of the Vercel LaunchDarkly
+SDK. This is a [Next.js](https://nextjs.org/) project bootstrapped with [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app).
+
+## Prerequisites
+
+A node environment of version 16 and yarn are required to develop in this repository.
+You will also need the vercel cli installed and a Vercel account to setup
+the test data required by this example. See the [Vercel docs](https://vercel.com/docs/storage/edge-config/get-started) on how to setup your edge config store.
+
+## Usage
+
+1. Follow the [Vercel docs](https://vercel.com/docs/storage/edge-config/get-started) to insert [testData.json](https://github.com/launchdarkly/js-core/blob/main/packages/sdk/vercel/testData.json) to your edge config store.
+
+2. After completing the guide above, you should have linked this example app to your Vercel project and created an `.env.development.local`.
+
+3. At the root of the js-core repo:
+
+```shell
+yarn && yarn build
+```
+
+4. Then back in this example folder:
+
+```shell
+yarn dev
+```
+
+5. Open [http://localhost:3000/api/hello](http://localhost:3000/api/hello).

packages/sdk/vercel/example-vercel/next.config.js

@@ -0,0 +1,8 @@
+/** @type {import('next').NextConfig} */
+const nextConfig = {
+  experimental: {
+    appDir: true,
+  },
+};
+
+module.exports = nextConfig;

packages/sdk/vercel/example-vercel/package.json

@@ -0,0 +1,27 @@
+{
+  "name": "example-vercel",
+  "version": "0.0.0",
+  "packageManager": "yarn@3.4.1",
+  "scripts": {
+    "dev": "next dev",
+    "build": "tsc",
+    "start": "next start",
+    "lint": "next lint"
+  },
+  "dependencies": {
+    "@launchdarkly/vercel-server-sdk": "0.2.2",
+    "@vercel/edge-config": "^0.1.8",
+    "next": "13.3.1",
+    "react": "18.2.0",
+    "react-dom": "18.2.0"
+  },
+  "devDependencies": {
+    "@types/node": "18.16.2",
+    "@types/react": "18.2.0",
+    "@types/react-dom": "18.2.1",
+    "autoprefixer": "10.4.14",
+    "postcss": "8.4.23",
+    "tailwindcss": "3.3.2",
+    "typescript": "5.0.4"
+  }
+}

packages/sdk/vercel/example-vercel/postcss.config.js

@@ -0,0 +1,6 @@
+module.exports = {
+  plugins: {
+    tailwindcss: {},
+    autoprefixer: {},
+  },
+};

packages/sdk/vercel/example-vercel/src/app/api/hello/route.ts

@@ -0,0 +1,37 @@
+import { NextResponse } from 'next/server';
+import { createClient } from '@vercel/edge-config';
+import { init as initLD } from '@launchdarkly/vercel-server-sdk';
+
+export const config = {
+  runtime: 'edge',
+};
+
+export async function GET() {
+  const sdkKey = 'test-sdk-key';
+  const flagKey = 'testFlag1';
+
+  // default fallthrough evaluates to true
+  const contextFallthrough = { kind: 'user', key: 'test-user-key-1' };
+
+  // matches email targeting rule evaluates to false
+  const contextEmailRule = { kind: 'user', key: 'test-user-key-1', email: 'test@gmail.com' };
+
+  const vercelClient = createClient(process.env.EDGE_CONFIG);
+
+  // start using ld
+  const client = initLD(sdkKey, vercelClient);
+  await client.waitForInitialization();
+  const fallthrough = await client.variation(flagKey, contextFallthrough, false);
+  const emailRule = await client.variation(flagKey, contextEmailRule, false);
+  const flagDetail = await client.variationDetail(flagKey, contextEmailRule, false);
+  const allFlags = await client.allFlagsState(contextEmailRule);
+
+  return NextResponse.json({
+    flagKey: `${flagKey}`,
+    contextKey: `${contextFallthrough.key}`,
+    fallthrough,
+    emailRule,
+    emailRuleDetail: `${JSON.stringify(flagDetail)}`,
+    allFlags: `${JSON.stringify(allFlags)}`,
+  });
+}

packages/sdk/vercel/example-vercel/src/app/globals.css

@@ -0,0 +1,23 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+:root {
+  --foreground-rgb: 0, 0, 0;
+  --background-start-rgb: 214, 219, 220;
+  --background-end-rgb: 255, 255, 255;
+}
+
+@media (prefers-color-scheme: dark) {
+  :root {
+    --foreground-rgb: 255, 255, 255;
+    --background-start-rgb: 0, 0, 0;
+    --background-end-rgb: 0, 0, 0;
+  }
+}
+
+body {
+  color: rgb(var(--foreground-rgb));
+  background: linear-gradient(to bottom, transparent, rgb(var(--background-end-rgb)))
+    rgb(var(--background-start-rgb));
+}

packages/sdk/vercel/example-vercel/src/app/layout.tsx

@@ -0,0 +1,17 @@
+import './globals.css';
+import { Inter } from 'next/font/google';
+
+const inter = Inter({ subsets: ['latin'] });
+
+export const metadata = {
+  title: 'Create Next App',
+  description: 'Generated by create next app',
+};
+
+export default function RootLayout({ children }: { children: React.ReactNode }) {
+  return (
+    <html lang="en">
+      <body className={inter.className}>{children}</body>
+    </html>
+  );
+}

packages/sdk/vercel/example-vercel/src/app/page.tsx

@@ -0,0 +1,116 @@
+import Image from 'next/image';
+import { Inter } from 'next/font/google';
+
+const inter = Inter({ subsets: ['latin'] });
+
+export default function Home() {
+  return (
+    <main className="flex min-h-screen flex-col items-center justify-between p-24">
+      <div className="z-10 w-full max-w-5xl items-center justify-between font-mono text-sm lg:flex">
+        <p className="fixed left-0 top-0 flex w-full justify-center border-b border-gray-300 bg-gradient-to-b from-zinc-200 pb-6 pt-8 backdrop-blur-2xl dark:border-neutral-800 dark:bg-zinc-800/30 dark:from-inherit lg:static lg:w-auto  lg:rounded-xl lg:border lg:bg-gray-200 lg:p-4 lg:dark:bg-zinc-800/30">
+          Get started by editing&nbsp;
+          <code className="font-mono font-bold">src/app/page.tsx</code>
+        </p>
+        <div className="fixed bottom-0 left-0 flex h-48 w-full items-end justify-center bg-gradient-to-t from-white via-white dark:from-black dark:via-black lg:static lg:h-auto lg:w-auto lg:bg-none">
+          <a
+            className="pointer-events-none flex place-items-center gap-2 p-8 lg:pointer-events-auto lg:p-0"
+            href="https://vercel.com?utm_source=create-next-app&utm_medium=appdir-template&utm_campaign=create-next-app"
+            target="_blank"
+            rel="noopener noreferrer"
+          >
+            By{' '}
+            <Image
+              src="/vercel.svg"
+              alt="Vercel Logo"
+              className="dark:invert"
+              width={100}
+              height={24}
+              priority
+            />
+          </a>
+        </div>
+      </div>
+
+      <div className="relative flex place-items-center before:absolute before:h-[300px] before:w-[480px] before:-translate-x-1/2 before:rounded-full before:bg-gradient-radial before:from-white before:to-transparent before:blur-2xl before:content-[''] after:absolute after:-z-20 after:h-[180px] after:w-[240px] after:translate-x-1/3 after:bg-gradient-conic after:from-sky-200 after:via-blue-200 after:blur-2xl after:content-[''] before:dark:bg-gradient-to-br before:dark:from-transparent before:dark:to-blue-700 before:dark:opacity-10 after:dark:from-sky-900 after:dark:via-[#0141ff] after:dark:opacity-40 before:lg:h-[360px]">
+        <Image
+          className="relative dark:drop-shadow-[0_0_0.3rem_#ffffff70] dark:invert"
+          src="/next.svg"
+          alt="Next.js Logo"
+          width={180}
+          height={37}
+          priority
+        />
+      </div>
+
+      <div className="mb-32 grid text-center lg:mb-0 lg:grid-cols-4 lg:text-left">
+        <a
+          href="https://beta.nextjs.org/docs?utm_source=create-next-app&utm_medium=appdir-template&utm_campaign=create-next-app"
+          className="group rounded-lg border border-transparent px-5 py-4 transition-colors hover:border-gray-300 hover:bg-gray-100 hover:dark:border-neutral-700 hover:dark:bg-neutral-800/30"
+          target="_blank"
+          rel="noopener noreferrer"
+        >
+          <h2 className={`mb-3 text-2xl font-semibold`}>
+            Docs{' '}
+            <span className="inline-block transition-transform group-hover:translate-x-1 motion-reduce:transform-none">
+              -&gt;
+            </span>
+          </h2>
+          <p className={`m-0 max-w-[30ch] text-sm opacity-50`}>
+            Find in-depth information about Next.js features and API.
+          </p>
+        </a>
+
+        <a
+          href="https://nextjs.org/learn?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
+          className="group rounded-lg border border-transparent px-5 py-4 transition-colors hover:border-gray-300 hover:bg-gray-100 hover:dark:border-neutral-700 hover:dark:bg-neutral-800 hover:dark:bg-opacity-30"
+          target="_blank"
+          rel="noopener noreferrer"
+        >
+          <h2 className={`mb-3 text-2xl font-semibold`}>
+            Learn{' '}
+            <span className="inline-block transition-transform group-hover:translate-x-1 motion-reduce:transform-none">
+              -&gt;
+            </span>
+          </h2>
+          <p className={`m-0 max-w-[30ch] text-sm opacity-50`}>
+            Learn about Next.js in an interactive course with&nbsp;quizzes!
+          </p>
+        </a>
+
+        <a
+          href="https://vercel.com/templates?framework=next.js&utm_source=create-next-app&utm_medium=appdir-template&utm_campaign=create-next-app"
+          className="group rounded-lg border border-transparent px-5 py-4 transition-colors hover:border-gray-300 hover:bg-gray-100 hover:dark:border-neutral-700 hover:dark:bg-neutral-800/30"
+          target="_blank"
+          rel="noopener noreferrer"
+        >
+          <h2 className={`mb-3 text-2xl font-semibold`}>
+            Templates{' '}
+            <span className="inline-block transition-transform group-hover:translate-x-1 motion-reduce:transform-none">
+              -&gt;
+            </span>
+          </h2>
+          <p className={`m-0 max-w-[30ch] text-sm opacity-50`}>
+            Explore the Next.js 13 playground.
+          </p>
+        </a>
+
+        <a
+          href="https://vercel.com/new?utm_source=create-next-app&utm_medium=appdir-template&utm_campaign=create-next-app"
+          className="group rounded-lg border border-transparent px-5 py-4 transition-colors hover:border-gray-300 hover:bg-gray-100 hover:dark:border-neutral-700 hover:dark:bg-neutral-800/30"
+          target="_blank"
+          rel="noopener noreferrer"
+        >
+          <h2 className={`mb-3 text-2xl font-semibold`}>
+            Deploy{' '}
+            <span className="inline-block transition-transform group-hover:translate-x-1 motion-reduce:transform-none">
+              -&gt;
+            </span>
+          </h2>
+          <p className={`m-0 max-w-[30ch] text-sm opacity-50`}>
+            Instantly deploy your Next.js site to a shareable URL with Vercel.
+          </p>
+        </a>
+      </div>
+    </main>
+  );
+}

packages/sdk/vercel/example-vercel/tailwind.config.js

@@ -0,0 +1,17 @@
+/** @type {import('tailwindcss').Config} */
+module.exports = {
+  content: [
+    './src/pages/**/*.{js,ts,jsx,tsx,mdx}',
+    './src/components/**/*.{js,ts,jsx,tsx,mdx}',
+    './src/app/**/*.{js,ts,jsx,tsx,mdx}',
+  ],
+  theme: {
+    extend: {
+      backgroundImage: {
+        'gradient-radial': 'radial-gradient(var(--tw-gradient-stops))',
+        'gradient-conic': 'conic-gradient(from 180deg at 50% 50%, var(--tw-gradient-stops))',
+      },
+    },
+  },
+  plugins: [],
+};