Method send

src/lib/EventHandler.js:226–240

* Like emit but receiver can send response * @param {String} event The event descriptor * @param {Object} options (optional) Data to be sent in the event * @param {Object} port (optional) The port to be used. If * not specified, the main port is u

(event, options = {})

   * @return {Promise}
   */
  send(event, options = {}) {
    return new Promise((resolve, reject) => {
      if (!event || typeof event !== 'string') {
        return reject(new Error('Invalid event!'));
      }
      this.#checkConnection();
      if (!this.#reply) {
        this.#reply = new Map();
      }
      options.event = event;
      options._reply = ++this.#replyCount;
      this.#reply.set(options._reply, {resolve, reject});
      this._port.postMessage(options);
    });
  }
}