code: function unhide_(element) {
      if (element.hidden) {
        element.hidden = false;
        element.style.visibility = 'visible';
        element.style.height = null;
        element.style.width = null;
  
        /**
         * Dispatch unhide even if URL's fragment matches with a route
         * and router.hidden = false
         *
         * @event MaterialRouter3#unhide
         * @type {CustomEvent}
         * @property {HTMLElement} router - The router that dispatches
         *   this event
         */
        element.dispatchEvent(new CustomEvent('unhide', {
          detail: {
            router: element
          }
        }));
      }
      return true;
    }
docs: Unhide element and dispatch unhide event
  
  @param {HTMLElement} element - The element
  @private