locale()

locale(): string

locale(name: string): string

import { locale } from "@pyyupsk/fdu";

console.log(locale()); // 'en' (default)

import { fdu, locale } from "@pyyupsk/fdu";

// Set global locale to Spanish
locale("es");

// All new instances use Spanish
const date = fdu("2024-01-15");
date.format("MMMM"); // 'enero'

import { fdu, locale } from "@pyyupsk/fdu";

// Initially English
locale(); // 'en'

const date1 = fdu("2024-01-15");
date1.format("MMMM"); // 'January'

// Change to Spanish
locale("es");

const date2 = fdu("2024-01-15");
date2.format("MMMM"); // 'enero'

// Previous instances unchanged
date1.format("MMMM"); // 'January' (still English)

import { locale, registerLocale } from "@pyyupsk/fdu";
import { es } from "@pyyupsk/fdu/locale/es";
import { fr } from "@pyyupsk/fdu/locale/fr";

// Register all supported locales at startup
registerLocale("es", es);
registerLocale("fr", fr);

// Switch based on user preference
function setUserLanguage(lang: string) {
  locale(lang);
}

// User selects Spanish
setUserLanguage("es");

// All new dates use Spanish
const date = fdu();
date.format("dddd, MMMM D"); // 'lunes, enero 15'

function switchLanguage(newLocale: string) {
  const previousLocale = locale();
  locale(newLocale);

  console.log(`Switched from ${previousLocale} to ${newLocale}`);
  return previousLocale;
}

switchLanguage("es"); // 'Switched from en to es'

// app-init.ts
import { locale, registerLocale } from "@pyyupsk/fdu";
import { es } from "@pyyupsk/fdu/locale/es";
import { fr } from "@pyyupsk/fdu/locale/fr";
import { de } from "@pyyupsk/fdu/locale/de";

export function initializeLocales(userLocale: string = "en") {
  // Register all locales
  registerLocale("es", es);
  registerLocale("fr", fr);
  registerLocale("de", de);

  // Set user's preferred locale
  locale(userLocale);
}

// In your app entry point
initializeLocales(getUserPreferredLanguage());

import { locale, registerLocale } from "@pyyupsk/fdu";
import { es } from "@pyyupsk/fdu/locale/es";
import { fr } from "@pyyupsk/fdu/locale/fr";

// Register locales
registerLocale("es", es);
registerLocale("fr", fr);

// Detect browser language
const browserLang = navigator.language.split("-")[0]; // 'en', 'es', 'fr', etc.

// Set global locale based on browser
if (["es", "fr", "de"].includes(browserLang)) {
  locale(browserLang);
}

function withLocale<T>(localeName: string, fn: () => T): T {
  const previousLocale = locale();
  locale(localeName);

  try {
    return fn();
  } finally {
    locale(previousLocale);
  }
}

// Usage
const spanishDate = withLocale("es", () => {
  return fdu("2024-01-15").format("MMMM D, YYYY");
});
// 'enero 15, 2024'

// Global locale restored after function
locale(); // back to previous locale

// ✅ Good - set at application start
// main.ts
import { locale } from "@pyyupsk/fdu";

locale("es"); // Set once at startup

// ❌ Avoid - setting repeatedly
function formatDate(date: FduInstance) {
  locale("es"); // Don't do this on every call
  return date.format("YYYY-MM-DD");
}

import { locale, registerLocale } from "@pyyupsk/fdu";
import { es } from "@pyyupsk/fdu/locale/es";

function setAppLocale(localeName: string) {
  // Ensure locale is registered
  if (localeName === "es") {
    registerLocale("es", es);
  }

  locale(localeName);
}