Web Development Programming Tutorials, Guides & Best Practices

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:

Then load them like:

resources: {
  en: {
    home: require('./locales/en/home.json'),
    dashboard: require('./locales/en/dashboard.json'),
  },
  fr: {
    home: require('./locales/fr/home.json'),
    dashboard: require('./locales/fr/dashboard.json'),
  },
},
ns: ['home', 'dashboard'],
defaultNS: 'home',

Then start the host app (React):

cd app-shell
npx webpack serve

const count = useStore((state) => state.count);

By selecting only the necessary state slices, you can optimize component rendering and improve performance.

   const value = useMemo(() => ({ user, setUser }), [user]);

   const increment = useCallback(() => setCount(c => c + 1), []);