routeList(returnHash) {
    if (returnHash === true)
      return this.routeIds.map((r) => returnHash === true ? `#${r.id}` : r.id);
    return this.routeIds;
  }
Return an array of route ids (to facilitate creation of menus)
@param {boolean} returnHash If true, returns id's with leading `#` to apply to href attributes else returns the id
@returns {string[]} Array of route id's or route url hashes