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docs: add defineNuxtRouteMiddleware migration (#21718)

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Ryota Watanabe 2023-06-23 23:47:21 +09:00 committed by GitHub
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docs/6.bridge/1.overview.md
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@ -233,6 +233,28 @@ If you want to use the new Nuxt composables (such as `useNuxtApp` or `useRuntime
Although a compatibility interface is provided via `nuxtApp.vueApp` you should avoid registering plugins, directives, mixins or components this way without adding your own logic to ensure they are not installed more than once, or this may cause a memory leak. Although a compatibility interface is provided via `nuxtApp.vueApp` you should avoid registering plugins, directives, mixins or components this way without adding your own logic to ensure they are not installed more than once, or this may cause a memory leak.
:: ::
## New Middleware Format (Optional)
You can now migrate to the Nuxt 3 middleware API, which is slightly different in format from Nuxt 2.
Middleware now take only two argument (`to`, `from`). You can find out more in [the docs](/docs/guide/directory-structure/middleware).
```js
export default defineNuxtRouteMiddleware((to) => {
if (to.path !== '/') {
return navigateTo('/')
}
})
```
::alert{type=warning}
Use of `defineNuxtRouteMiddleware` is not supported outside of the middleware directory.
::
::alert{type=warning}
Nuxt Bridge does not support `definePageMeta`.
::
## New `useHead` (Optional) ## New `useHead` (Optional)
Nuxt Bridge provides a new Nuxt 3 meta API that can be accessed with a new `useHead` composable. Nuxt Bridge provides a new Nuxt 3 meta API that can be accessed with a new `useHead` composable.