Search middleware to retain search params

retainSearchParams is a search middleware that allows to keep search params.

retainSearchParams props

The retainSearchParams either accepts true or a list of keys of those search params that shall be retained. If true is passed in, all search params will be retained.

Examples

tsx

import { z } from 'zod'
import { createRootRoute, retainSearchParams } from '@tanstack/react-router'

const searchSchema = z.object({
  rootValue: z.string().optional(),
})

export const Route = createRootRoute({
  // Use the schema directly for Zod v4
  validateSearch: searchSchema,
  search: {
    middlewares: [retainSearchParams(['rootValue'])],
  },
})

tsx

import { z } from 'zod'
import { createFileRoute, retainSearchParams } from '@tanstack/react-router'

const searchSchema = z.object({
  one: z.string().optional(),
  two: z.string().optional(),
})

export const Route = createFileRoute('/')({
  // Use the schema directly for Zod v4
  validateSearch: searchSchema,
  search: {
    middlewares: [retainSearchParams(true)],
  },
})