docs: function hide_(element) {
      if (!element.hidden) {
        element.hidden = true;
        element.style.visibility = 'hidden';
        element.style.height = '0px';
        element.style.width = '0px';
  
        /**
         * Dispatch hide event if URL's fragment matches with a route
         * and router.hidden = true
         *
         * @event MaterialRouter3#hide
         * @type {CustomEvent}
         * @property {HTMLElement} router - The router that dispatches
         *   this event
         */
        element.dispatchEvent(new CustomEvent('hide', {
          detail: {
            router: element
          }
        }));
      }
      return true;
    }