docs: nextjs class app (#251)

Author: maxprilutskiy

demo/next-classic-app/.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+.yarn/install-state.gz
+
+# 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

demo/next-classic-app/README.md

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+This is a [Next.js](https://nextjs.org) project bootstrapped with [`create-next-app`](https://nextjs.org/docs/app/api-reference/cli/create-next-app).
+
+## Getting Started
+
+First, run the development server:
+
+```bash
+npm run dev
+# or
+yarn dev
+# or
+pnpm dev
+# or
+bun dev
+```
+
+Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
+
+You can start editing the page by modifying `app/page.tsx`. The page auto-updates as you edit the file.
+
+This project uses [`next/font`](https://nextjs.org/docs/app/building-your-application/optimizing/fonts) to automatically optimize and load [Geist](https://vercel.com/font), a new font family for Vercel.
+
+## Learn More
+
+To learn more about Next.js, take a look at the following resources:
+
+- [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API.
+- [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial.
+
+You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js) - your feedback and contributions are welcome!
+
+## Deploy on Vercel
+
+The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
+
+Check out our [Next.js deployment documentation](https://nextjs.org/docs/app/building-your-application/deploying) for more details.

demo/next-classic-app/i18n.json

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+{
+  "version": 1.2,
+  "locale": {
+    "source": "en",
+    "targets": [
+      "es"
+    ]
+  },
+  "buckets": {
+    "json": {
+      "include": [
+        "src/locales/[locale].json"
+      ]
+    }
+  }
+}

demo/next-classic-app/i18n.lock

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+version: 1
+checksums:
+  63f4c97e43b1d06779a7f553869f769a:
+    home.title: aa72464a366b091aa6f2037ca869c09c
+    counter.title: 8a1e7a9e646c72c2259e67556795eca4
+    counter.decrement: ccc26acd514d8f23f4874a17f57c26c9
+    counter.increment: 2286b28fa37112af76d6f5952c4b928e

demo/next-classic-app/next.config.mjs

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+/** @type {import('next').NextConfig} */
+const nextConfig = {};
+
+export default nextConfig;

demo/next-classic-app/package.json

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+{
+  "name": "next-classic-app",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "i18n": "npx replexica@latest i18n"
+  },
+  "dependencies": {
+    "@formatjs/intl": "^2.10.8",
+    "@formatjs/intl-localematcher": "^0.5.5",
+    "negotiator": "^0.6.3",
+    "next": "14.2.15",
+    "react": "^18",
+    "react-dom": "^18",
+    "react-intl": "^6.8.0"
+  },
+  "devDependencies": {
+    "@types/negotiator": "^0.6.3",
+    "@types/node": "^20",
+    "@types/react": "^18",
+    "@types/react-dom": "^18",
+    "postcss": "^8",
+    "tailwindcss": "^3.4.1",
+    "typescript": "^5"
+  }
+}

demo/next-classic-app/postcss.config.mjs

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+/** @type {import('postcss-load-config').Config} */
+const config = {
+  plugins: {
+    tailwindcss: {},
+  },
+};
+
+export default config;

demo/next-classic-app/src/app/[locale]/counter.tsx

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+'use client';
+
+import { useState } from 'react';
+import { useIntl, FormattedMessage } from 'react-intl';
+
+// Example of a client component
+export default function Counter() {
+  const intl = useIntl();
+
+  const [count, setCount] = useState(0);
+
+  const increment = () => setCount(count + 1);
+  const decrement = () => setCount(count - 1);
+
+  return (
+    <div>
+      <h2>
+        <FormattedMessage id="counter.title" values={{ count }} />
+      </h2>
+      <button onClick={decrement}>
+        {intl.formatMessage({id: 'counter.decrement'})} {/* Example of using the intl object */}
+      </button>
+      <button onClick={increment}>
+        <FormattedMessage id="counter.increment" /> {/* Example of using the FormattedMessage component */}
+      </button>
+    </div>
+  );
+}

demo/next-classic-app/src/app/[locale]/globals.css

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+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+:root {
+  --background: #ffffff;
+  --foreground: #171717;
+}
+
+@media (prefers-color-scheme: dark) {
+  :root {
+    --background: #0a0a0a;
+    --foreground: #ededed;
+  }
+}
+
+body {
+  color: var(--foreground);
+  background: var(--background);
+  font-family: Arial, Helvetica, sans-serif;
+}
+
+@layer utilities {
+  .text-balance {
+    text-wrap: balance;
+  }
+}

demo/next-classic-app/src/app/[locale]/layout.tsx

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+import type { Metadata } from "next";
+import "./globals.css";
+import loadIntl from "@/i18n/server";
+import { IntlProvider } from "@/i18n/client";
+export const metadata: Metadata = {
+  title: "Create Next App",
+  description: "Generated by create next app",
+};
+
+export default async function RootLayout(props: any) {
+  const intl = await loadIntl(props.params.locale);
+
+  return (
+    <IntlProvider locale={intl.locale} messages={intl.messages}>
+      <html lang={intl.locale}>
+        <body className="">
+          {props.children}
+        </body>
+      </html>
+    </IntlProvider>
+  );
+}