nuxt-i18n-micro/dist/runtime/utils/locale-detector.js

Nuxt I18n Micro is a lightweight, high-performance internationalization module for Nuxt, designed to handle multi-language support with minimal overhead, fast build times, and efficient runtime performance.

import { getQuery, getCookie, getRequestURL } from "h3";
export const detectCurrentLocale = (event, config, defaultLocale) => {
  const { fallbackLocale, defaultLocale: configDefaultLocale, locales } = config;
  if (event.context.params?.locale) {
    return event.context.params.locale.toString();
  }
  const queryLocale = getQuery(event)?.locale;
  if (queryLocale) {
    return queryLocale.toString();
  }
  if (locales && locales.length > 0) {
    const url = getRequestURL(event);
    const querySplit = url.pathname.split("?");
    const cleanPath = querySplit[0]?.split("#")[0];
    if (!cleanPath) return defaultLocale || "en";
    const pathSegments = cleanPath.split("/").filter(Boolean);
    const firstSegment = pathSegments[0] || "";
    if (firstSegment && locales.some((l) => l.code === firstSegment)) {
      return firstSegment;
    }
  }
  return (getCookie(event, "user-locale") || event.headers.get("accept-language")?.split(",")[0] || fallbackLocale || defaultLocale || configDefaultLocale || "en").toString();
};