Is there any way to transform search parameters without changing the URL?

[Hoofoo-WHU]

I have a string representing a relative date, such as -1d meaning yesterday, -1w meaning last week. I want to convert these relative dates into a Date object but the URL remains unchanged.

This is how I am doing it now

export const Route = createFileRoute('/')({
  component: RouteComponent,
  validateSearch: z.object({
    date: z
      .custom<RelativeDate>()
      .transform((relativeDate) => {
        return transformRelativeDate(relativeDate);
      })
      .default(() => new Date())
      .catch(() => new Date()),
  }),
});

I got such a URL http://localhost:8080/?date=%222025-07-15T14%3A05%3A27.195Z%22

Can I only perform such a conversion after useSearch like below?

export const Route = createFileRoute('/')({
  component: RouteComponent,
  validateSearch: z.object({
    date: z.custom<RelativeDate>().default('now').catch('now'),
  }),
});
function RouteComponent(): ReactNode {
  const search = Route.useSearch();
  const date = transformRelativeDate(search.date);
  return <div>Hello {date}/</div>;
}

Is there a way to perform the conversion after validateSearch without having to manually convert each time useSearch is used?

I think it is roughly like this：

export const Route = createFileRoute('/')({
  component: RouteComponent,
  validateSearch: z.object({
    date: z.custom<RelativeDate>().default('now').catch('now'),
  }),
  transformSearch: (search) => {
    return {
      ...search,
      date: transformRelativeDate(search.date),
    };
  },
});

function RouteComponent(): ReactNode {
  const search = Route.useSearch();
  return <div>Hello {search.date}/</div>;
}

[schiller-manuel]

not possible (at least yet).