javascript-time-ago/commonjs/locale.js

Localized relative date/time formatting

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = chooseLocale;
exports.intlDateTimeFormatSupported = intlDateTimeFormatSupported;
exports.intlDateTimeFormatSupportedLocale = intlDateTimeFormatSupportedLocale;
function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
function _createForOfIteratorHelperLoose(r, e) { var t = "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"]; if (t) return (t = t.call(r)).next.bind(t); if (Array.isArray(r) || (t = _unsupportedIterableToArray(r)) || e && r && "number" == typeof r.length) { t && (r = t); var o = 0; return function () { return o >= r.length ? { done: !0 } : { done: !1, value: r[o++] }; }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(r, a) { if (r) { if ("string" == typeof r) return _arrayLikeToArray(r, a); var t = {}.toString.call(r).slice(8, -1); return "Object" === t && r.constructor && (t = r.constructor.name), "Map" === t || "Set" === t ? Array.from(r) : "Arguments" === t || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(t) ? _arrayLikeToArray(r, a) : void 0; } }
function _arrayLikeToArray(r, a) { (null == a || a > r.length) && (a = r.length); for (var e = 0, n = Array(a); e < a; e++) { n[e] = r[e]; } return n; }
/**
 * Chooses the most appropriate locale
 * (one of the registered ones)
 * based on the list of preferred `locales` supplied by the user.
 *
 * @param {string[]} locales - the list of preferable locales (in [IETF format](https://en.wikipedia.org/wiki/IETF_language_tag)).
 * @param {Function} isLocaleDataAvailable - tests if a locale is available.
 *
 * @returns {string} The most suitable locale.
 *
 * @example
 * // Returns 'en'
 * chooseLocale(['en-US'], undefined, (locale) => locale === 'ru' || locale === 'en')
 */
function chooseLocale(locales, isLocaleDataAvailable) {
  // This is not an intelligent algorithm,
  // but it will do for this library's case.
  // `sr-Cyrl-BA` -> `sr-Cyrl` -> `sr`.
  for (var _iterator = _createForOfIteratorHelperLoose(locales), _step; !(_step = _iterator()).done;) {
    var locale = _step.value;
    if (isLocaleDataAvailable(locale)) {
      return locale;
    }
    var parts = locale.split('-');
    while (parts.length > 1) {
      parts.pop();
      locale = parts.join('-');
      if (isLocaleDataAvailable(locale)) {
        return locale;
      }
    }
  }
  throw new Error("No locale data has been registered for any of the locales: ".concat(locales.join(', ')));
}

/**
 * Whether can use `Intl.DateTimeFormat` for these `locales`.
 * Returns the first suitable one.
 * @param  {(string|string[])} locales
 * @return {?string} The first locale that can be used.
 */
function intlDateTimeFormatSupportedLocale(locales) {
  /* istanbul ignore else */
  if (intlDateTimeFormatSupported()) {
    return Intl.DateTimeFormat.supportedLocalesOf(locales)[0];
  }
}

/**
 * Whether can use `Intl.DateTimeFormat`.
 * @return {boolean}
 */
function intlDateTimeFormatSupported() {
  // Babel transforms `typeof` into some "branches"
  // so istanbul will show this as "branch not covered".
  /* istanbul ignore next */
  var isIntlAvailable = (typeof Intl === "undefined" ? "undefined" : _typeof(Intl)) === 'object';
  return isIntlAvailable && typeof Intl.DateTimeFormat === 'function';
}
//# sourceMappingURL=locale.js.map