mirror of https://github.com/nuxt/nuxt.git
86 lines
2.6 KiB
Markdown
86 lines
2.6 KiB
Markdown
---
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title: 'addRouteMiddleware'
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description: 'addRouteMiddleware() is a helper function to dynamically add middleware in your application.'
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links:
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- label: Source
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icon: i-simple-icons-github
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to: https://github.com/nuxt/nuxt/blob/main/packages/nuxt/src/app/composables/router.ts
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size: xs
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---
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::note
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Route middleware are navigation guards stored in the [`middleware/`](/docs/guide/directory-structure/middleware) directory of your Nuxt application (unless [set otherwise](/docs/api/nuxt-config#middleware)).
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::
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## Type
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```ts
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addRouteMiddleware (name: string | RouteMiddleware, middleware?: RouteMiddleware, options: AddRouteMiddlewareOptions = {})
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```
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## Parameters
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### `name`
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- **Type:** `string` | `RouteMiddleware`
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Can be either a string or a function of type `RouteMiddleware`. Function takes the next route `to` as the first argument and the current route `from` as the second argument, both of which are Vue route objects.
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Learn more about available properties of [route objects](/docs/api/composables/use-route).
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### `middleware`
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- **Type:** `RouteMiddleware`
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The second argument is a function of type `RouteMiddleware`. Same as above, it provides `to` and `from` route objects. It becomes optional if the first argument in `addRouteMiddleware()` is already passed as a function.
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### `options`
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- **Type:** `AddRouteMiddlewareOptions`
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An optional `options` argument lets you set the value of `global` to `true` to indicate whether the router middleware is global or not (set to `false` by default).
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## Examples
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### Anonymous Route Middleware
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Anonymous route middleware does not have a name. It takes a function as the first argument, making the second `middleware` argument redundant:
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```ts [plugins/my-plugin.ts]
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export default defineNuxtPlugin(() => {
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addRouteMiddleware((to, from) => {
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if (to.path === '/forbidden') {
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return false
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}
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})
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})
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```
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### Named Route Middleware
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Named route middleware takes a string as the first argument and a function as the second.
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When defined in a plugin, it overrides any existing middleware of the same name located in the `middleware/` directory:
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```ts [plugins/my-plugin.ts]
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export default defineNuxtPlugin(() => {
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addRouteMiddleware('named-middleware', () => {
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console.log('named middleware added in Nuxt plugin')
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})
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})
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```
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### Global Route Middleware
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Set an optional, third argument `{ global: true }` to indicate whether the route middleware is global:
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```ts [plugins/my-plugin.ts]
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export default defineNuxtPlugin(() => {
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addRouteMiddleware('global-middleware', (to, from) => {
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console.log('global middleware that runs on every route change')
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},
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{ global: true }
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)
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})
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```
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