/**
 * Get locale from browser
 *
 * @returns {string} browser locale, i.e. `en`, `en-US`, `fr`, ...
 */
export const getNavigatorLocale = () =>
  navigator.language || navigator.userLanguage || navigator.browserLanguage || navigator.systemLanguage;

/**
 * normalize locale to dashes
 *
 * @param {string} locale
 * @returns {string} locale
 */
export const normalizeLocale = locale => (locale || '').replace('_', '-');

/**
 * extract the language code from a normalized locale
 *
 * @param {string} locale normalized locale: i.e. `en-US`, `de-CH`
 * @returns {string} language code, i.e. `en`, `de`
 */
export const getLanguageCodeFromLocale = locale => (locale || '').split('-')[0];