@winstrike/next-i18next-koa

Version:

The easiest way to translate your NextJs apps. With Koa support only. Forked from 'next-i18next'.

29 lines (24 loc) • 710 B

JavaScript

export default ((initialLng, fallbackLng) => {
  const languages = [];

  if (initialLng) {
    languages.push(initialLng);
  }

  if (fallbackLng) {
    if (typeof fallbackLng === 'string' && fallbackLng !== initialLng) {
      languages.push(fallbackLng);
    }

    if (Array.isArray(fallbackLng)) {
      languages.push(...fallbackLng);
    } else if (initialLng) {
      if (typeof fallbackLng[initialLng] === 'string') {
        languages.push(fallbackLng[initialLng]);
      } else if (Array.isArray(fallbackLng[initialLng])) {
        languages.push(...fallbackLng[initialLng]);
      }
    }

    if (fallbackLng.default) {
      languages.push(fallbackLng.default);
    }
  }

  return languages;
});