Javascript Programming Tutorials, Guides & Best Practices

Create pages/About.js:

import { useTranslation } from 'react-i18next';

export default function About() {
  const { t } = useTranslation();
  return (
    <div>
      <h1>{t('routes.about')}</h1>
    </div>
  );
}

• Ensure localized content fits small screens
• Test RTL support on all breakpoints
• Use dynamic font scaling for languages like Arabic or Hindi
• Translate push notifications and in-app messages

In 2025, certain laws enforce localized data:

Edit src/index.js:

import React from 'react';
import ReactDOM from 'react-dom/client';
import './index.css';
import App from './App';
import './i18n'; // 👈 import i18n config

const root = ReactDOM.createRoot(document.getElementById('root'));
root.render(<App />);

Now let’s set up the main container app.

npx create-react-app app-shell
cd app-shell
npm install -D webpack webpack-cli webpack-dev-server html-webpack-plugin

You can persist state to localStorage or sessionStorage:

import create from 'zustand';
import { persist } from 'zustand/middleware';

const useStore = create(persist(
  (set) => ({
    count: 0,
    increase: () => set((state) => ({ count: state.count + 1 })),
  }),
  {
    name: 'counter-storage',
  }
));