---
url: >-
  https://lit-ui-router.dev/reference/ui-router-server/url-config/interfaces/RouterUrlConfig.md
---
[ui-router-server](../../index.md) / [url-config](../index.md) / RouterUrlConfig

# Interface: RouterUrlConfig

Defined in: [url-config.ts:31](https://github.com/simshanith/lit-ui-router/blob/740888c2b2ba358c4dfa52a122e927df6a604b12/packages/ui-router-server/src/url-config.ts#L31)

The url options every `@uirouter/core` router takes through
`urlService.config`, and every mount takes through
[\`MountConfig.config\`](../../index/interfaces/MountConfig.md#config). An option left
undefined keeps core's default: strict, case-sensitive, no squash.

## Extends

* `Pick`<`UrlMatcherCompileConfig`, `"strict"` | `"caseInsensitive"`>

## Properties

| Property | Type | Description | Defined in |
| ------ | ------ | ------ | ------ |
|  `defaultSquashPolicy?` | `NonNullable`<`string` | `boolean` | `undefined`> | Squash policy for defaulted params that don't declare one (default false); value type pinned to core's UrlConfig.defaultSquashPolicy. | [url-config.ts:36](https://github.com/simshanith/lit-ui-router/blob/740888c2b2ba358c4dfa52a122e927df6a604b12/packages/ui-router-server/src/url-config.ts#L36) |
|  `trailingSlash?` | [`TrailingSlashPolicy`](../../index/interfaces/TrailingSlashPolicy.md) | Which spelling of a trailing slash is canonical, per kind of state; needs `strict: false`, so both spellings match first. A server mount answers the other spelling with a `308` redirect to the canonical one, and a router this config is applied to formats `href()` and the urls it pushes in the canonical spelling. **Example** `import type { RouterUrlConfig } from 'ui-router-server/url-config'; // pages at /releases/pkg/, response states at the url they were asked for export const urlConfig = { strict: false, trailingSlash: { pages: 'always' }, } satisfies RouterUrlConfig;` | [url-config.ts:57](https://github.com/simshanith/lit-ui-router/blob/740888c2b2ba358c4dfa52a122e927df6a604b12/packages/ui-router-server/src/url-config.ts#L57) |