Method getFallback

packages/runtime/src/messages.mjs:194–202

* Get the list of fallback locales * @param {string} [lc] If empty or undefined, defaults to `this.locale` * @returns {string[]}

(lc)

   * @returns {string[]}
   */
  getFallback(lc) {
    if (!lc) lc = this.locale;
    return (
      this._fallback[lc] ||
      (lc === this.defaultLocale || !this.defaultLocale
        ? []
        : [this.defaultLocale])
    );
  }

  /**
   * Set the fallback locale or locales for `lc`