Javascript Programming Tutorials, Guides & Best Practices

• Dynamically switch between translated URLs
• Support SEO-friendly, localized routing
• Scale to additional languages easily

• Add 404 fallbacks for non-matching paths
• Integrate i18next-http-backend to load translations from a CMS
• Use language subdomains (e.g., fr.site.com) for region-specific experiences

const formatCurrency = (value, lng) => {
  const currency = lng === 'ar' ? 'EGP' : 'USD';
  return new Intl.NumberFormat(lng, {
    style: 'currency',
    currency
  }).format(value);
};

Languages like Arabic and Hebrew need RTL layouts. Use CSS:

npx create-react-app react-i18n-demo
cd react-i18n-demo

Install the required dependencies:

Update src/bootstrap.js:

import('./App');

   import create from 'zustand';

   const useStore = create((set) => ({
     count: 0,
     increase: () => set((state) => ({ count: state.count + 1 })),
     decrease: () => set((state) => ({ count: state.count - 1 })),
   }));

   import React from 'react';
   import useStore from './store';

   function Counter() {
     const { count, increase, decrease } = useStore();
     return (
       <div>
         <h1>{count}</h1>
         <button onClick={increase}>Increase</button>
         <button onClick={decrease}>Decrease</button>
       </div>
     );
   }

   export default Counter;