export default ({ app }) => {
  app.router.beforeEach((to, from, next) => {
    // keep the graphql api url variable on all navigation,
    // if it is actually present.
    let target;

    if (!to.query.graph && from.query.graph) {
      target = {
        path: to.path,
        query: { ...to.query, graph: from.query.graph },
      };
    }
    next(target);
  });
}