TanStackRouter v1
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类型工具

TanStack Router 暴露的大多数类型属于内部实现，可能包含破坏性变更且不易使用。因此，TanStack Router 专门提供了一组面向外部使用的易用类型。这些类型在类型层面复现了路由运行时的类型安全特性，并允许灵活选择类型检查的介入位置。

使用 ValidateLinkOptions 校验链接选项

ValidateLinkOptions 会对对象字面量进行类型检查，确保其符合 Link 选项的推断要求。例如，当您有一个通用 HeadingLink 组件同时接收 title 属性和 linkOptions 时，该组件就能复用于任何导航场景：

tsx
export interface HeaderLinkProps<
  TRouter extends RegisteredRouter = RegisteredRouter,
  TOptions = unknown,
> {
  title: string
  linkOptions: ValidateLinkOptions<TRouter, TOptions>
}

export function HeadingLink<TRouter extends RegisteredRouter, TOptions>(
  props: HeaderLinkProps<TRouter, TOptions>,
): React.ReactNode
export function HeadingLink(props: HeaderLinkProps): React.ReactNode {
  return (
    <>
      <h1>{props.title}</h1>
      <Link {...props.linkOptions} />
    </>
  )
}

export interface HeaderLinkProps<
  TRouter extends RegisteredRouter = RegisteredRouter,
  TOptions = unknown,
> {
  title: string
  linkOptions: ValidateLinkOptions<TRouter, TOptions>
}

export function HeadingLink<TRouter extends RegisteredRouter, TOptions>(
  props: HeaderLinkProps<TRouter, TOptions>,
): React.ReactNode
export function HeadingLink(props: HeaderLinkProps): React.ReactNode {
  return (
    <>
      <h1>{props.title}</h1>
      <Link {...props.linkOptions} />
    </>
  )
}

通过更宽松的重载签名可避免泛型实现中的类型断言。虽然所有类型参数都是可选的，但为了最佳 TypeScript 性能，公开签名应始终指定 TRouter，而推断点（如 HeadingLink）应使用 TOptions 来正确收窄 params 和 search 类型。

这使得以下用法能获得完全类型安全的 linkOptions：

tsx
<HeadingLink title="Posts" linkOptions={{ to: '/posts' }} />
<HeadingLink title="Post" linkOptions={{ to: '/posts/$postId', params: {postId: 'postId'} }} />

<HeadingLink title="Posts" linkOptions={{ to: '/posts' }} />
<HeadingLink title="Post" linkOptions={{ to: '/posts/$postId', params: {postId: 'postId'} }} />

使用 ValidateLinkOptionsArray 校验链接选项数组

所有导航类型工具都提供数组变体。ValidateLinkOptionsArray 可校验 Link 选项数组的类型。例如在通用 Menu 组件中，每个菜单项都是 Link：

tsx
export interface MenuProps<
  TRouter extends RegisteredRouter = RegisteredRouter,
  TItems extends ReadonlyArray<unknown> = ReadonlyArray<unknown>,
> {
  items: ValidateLinkOptionsArray<TRouter, TItems>
}

export function Menu<
  TRouter extends RegisteredRouter = RegisteredRouter,
  TItems extends ReadonlyArray<unknown>,
>(props: MenuProps<TRouter, TItems>): React.ReactNode
export function Menu(props: MenuProps): React.ReactNode {
  return (
    <ul>
      {props.items.map((item) => (
        <li>
          <Link {...item} />
        </li>
      ))}
    </ul>
  )
}

export interface MenuProps<
  TRouter extends RegisteredRouter = RegisteredRouter,
  TItems extends ReadonlyArray<unknown> = ReadonlyArray<unknown>,
> {
  items: ValidateLinkOptionsArray<TRouter, TItems>
}

export function Menu<
  TRouter extends RegisteredRouter = RegisteredRouter,
  TItems extends ReadonlyArray<unknown>,
>(props: MenuProps<TRouter, TItems>): React.ReactNode
export function Menu(props: MenuProps): React.ReactNode {
  return (
    <ul>
      {props.items.map((item) => (
        <li>
          <Link {...item} />
        </li>
      ))}
    </ul>
  )
}

这使得以下 items 属性完全类型安全：

tsx
<Menu
  items={[
    { to: '/posts' },
    { to: '/posts/$postId', params: { postId: 'postId' } },
  ]}
/>

<Menu
  items={[
    { to: '/posts' },
    { to: '/posts/$postId', params: { postId: 'postId' } },
  ]}
/>

还可以通过 ValidateFromPath 工具固定数组中每个 Link 的 from 基准路径：

tsx
export interface MenuProps<
  TRouter extends RegisteredRouter = RegisteredRouter,
  TItems extends ReadonlyArray<unknown> = ReadonlyArray<unknown>,
  TFrom extends string = string,
> {
  from: ValidateFromPath<TRouter, TFrom>
  items: ValidateLinkOptionsArray<TRouter, TItems, TFrom>
}

export function Menu<
  TRouter extends RegisteredRouter = RegisteredRouter,
  TItems extends ReadonlyArray<unknown>,
  TFrom extends string = string,
>(props: MenuProps<TRouter, TItems, TFrom>): React.ReactNode
export function Menu(props: MenuProps): React.ReactNode {
  return (
    <ul>
      {props.items.map((item) => (
        <li>
          <Link {...item} from={props.from} />
        </li>
      ))}
    </ul>
  )
}

export interface MenuProps<
  TRouter extends RegisteredRouter = RegisteredRouter,
  TItems extends ReadonlyArray<unknown> = ReadonlyArray<unknown>,
  TFrom extends string = string,
> {
  from: ValidateFromPath<TRouter, TFrom>
  items: ValidateLinkOptionsArray<TRouter, TItems, TFrom>
}

export function Menu<
  TRouter extends RegisteredRouter = RegisteredRouter,
  TItems extends ReadonlyArray<unknown>,
  TFrom extends string = string,
>(props: MenuProps<TRouter, TItems, TFrom>): React.ReactNode
export function Menu(props: MenuProps): React.ReactNode {
  return (
    <ul>
      {props.items.map((item) => (
        <li>
          <Link {...item} from={props.from} />
        </li>
      ))}
    </ul>
  )
}

最终实现相对于固定路径的类型安全导航：

tsx
<Menu
  from="/posts"
  items={[{ to: '.' }, { to: './$postId', params: { postId: 'postId' } }]}
/>

<Menu
  from="/posts"
  items={[{ to: '.' }, { to: './$postId', params: { postId: 'postId' } }]}
/>

使用 ValidateRedirectOptions 校验重定向选项

ValidateRedirectOptions 会校验对象字面量是否符合重定向选项要求。例如在通用 fetchOrRedirect 函数中，当请求失败时执行重定向：

tsx
export async function fetchOrRedirect<
  TRouter extends RegisteredRouter = RegisteredRouter,
  TOptions,
>(
  url: string,
  redirectOptions: ValidateRedirectOptions<TRouter, TOptions>,
): Promise<unknown>
export async function fetchOrRedirect(
  url: string,
  redirectOptions: ValidateRedirectOptions,
): Promise<unknown> {
  const response = await fetch(url)

  if (!response.ok && response.status === 401) {
    throw redirect(redirectOptions)
  }

  return await response.json()
}

export async function fetchOrRedirect<
  TRouter extends RegisteredRouter = RegisteredRouter,
  TOptions,
>(
  url: string,
  redirectOptions: ValidateRedirectOptions<TRouter, TOptions>,
): Promise<unknown>
export async function fetchOrRedirect(
  url: string,
  redirectOptions: ValidateRedirectOptions,
): Promise<unknown> {
  const response = await fetch(url)

  if (!response.ok && response.status === 401) {
    throw redirect(redirectOptions)
  }

  return await response.json()
}

这使得传入 fetchOrRedirect 的 redirectOptions 完全类型安全：

tsx
fetchOrRedirect('http://example.com/', { to: '/login' })

fetchOrRedirect('http://example.com/', { to: '/login' })

使用 ValidateNavigateOptions 校验导航选项

ValidateNavigateOptions 会校验对象字面量是否符合导航选项要求。例如在自定义 Hook 中实现条件导航：

tsx
export interface UseConditionalNavigateResult {
  enable: () => void
  disable: () => void
  navigate: () => void
}

export function useConditionalNavigate<
  TRouter extends RegisteredRouter = RegisteredRouter,
  TOptions,
>(
  navigateOptions: ValidateNavigateOptions<TRouter, TOptions>,
): UseConditionalNavigateResult
export function useConditionalNavigate(
  navigateOptions: ValidateNavigateOptions,
): UseConditionalNavigateResult {
  const [enabled, setEnabled] = useState(false)
  const navigate = useNavigate()
  return {
    enable: () => setEnabled(true),
    disable: () => setEnabled(false),
    navigate: () => {
      if (enabled) {
        navigate(navigateOptions)
      }
    },
  }
}

export interface UseConditionalNavigateResult {
  enable: () => void
  disable: () => void
  navigate: () => void
}

export function useConditionalNavigate<
  TRouter extends RegisteredRouter = RegisteredRouter,
  TOptions,
>(
  navigateOptions: ValidateNavigateOptions<TRouter, TOptions>,
): UseConditionalNavigateResult
export function useConditionalNavigate(
  navigateOptions: ValidateNavigateOptions,
): UseConditionalNavigateResult {
  const [enabled, setEnabled] = useState(false)
  const navigate = useNavigate()
  return {
    enable: () => setEnabled(true),
    disable: () => setEnabled(false),
    navigate: () => {
      if (enabled) {
        navigate(navigateOptions)
      }
    },
  }
}

这使得传入 useConditionalNavigate 的 navigateOptions 完全类型安全，并能基于 React 状态控制导航：

tsx
const { enable, disable, navigate } = useConditionalNavigate({
  to: '/posts/$postId',
  params: { postId: 'postId' },
})

const { enable, disable, navigate } = useConditionalNavigate({
  to: '/posts/$postId',
  params: { postId: 'postId' },
})
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