mirror of
https://github.com/nuxt/nuxt.git
synced 2024-11-16 02:44:51 +00:00
133 lines
4.4 KiB
Markdown
133 lines
4.4 KiB
Markdown
---
|
|
title: Legacy Composition API
|
|
description: 'Learn how to migrate to Composition API with Nuxt Bridge.'
|
|
---
|
|
|
|
Nuxt Bridge provides access to Composition API syntax. It is specifically designed to be aligned with Nuxt 3. Because of this, there are a few extra steps to take when enabling Nuxt Bridge, if you have been using the Composition API previously.
|
|
|
|
## Remove Modules
|
|
|
|
- Remove `@vue/composition-api` from your dependencies.
|
|
- Remove `@nuxtjs/composition-api` from your dependencies (and from your modules in `nuxt.config`).
|
|
|
|
## Using `@vue/composition-api`
|
|
|
|
If you have been using just `@vue/composition-api` and not `@nuxtjs/composition-api`, then things are very straightforward.
|
|
|
|
1. First, remove the plugin where you are manually registering the Composition API. Nuxt Bridge will handle this for you.
|
|
|
|
```diff
|
|
- import Vue from 'vue'
|
|
- import VueCompositionApi from '@vue/composition-api'
|
|
-
|
|
- Vue.use(VueCompositionApi)
|
|
```
|
|
|
|
2. Otherwise, there is nothing you need to do. However, if you want, you can remove your explicit imports from `@vue/composition-api` and rely on Nuxt Bridge auto-importing them for you.
|
|
|
|
## Migrating from `@nuxtjs/composition-api`
|
|
|
|
Nuxt Bridge implements the Composition API slightly differently from `@nuxtjs/composition-api` and provides different composables (designed to be aligned with the composables that Nuxt 3 provides).
|
|
|
|
Because some composables have been removed and don't yet have a replacement, this will be a slightly more complicated process.
|
|
|
|
### Remove `@nuxtjs/composition-api/module` from your buildModules
|
|
|
|
You don't have to immediately update your imports yet - Nuxt Bridge will automatically provide a 'shim' for most imports you currently have, to give you time to migrate to the new, Nuxt 3-compatible composables, with the following exceptions:
|
|
|
|
- `withContext` has been removed. See [below](/docs/bridge/nuxt3-compatible-api#usecontext-and-withcontext).
|
|
- `useStatic` has been removed. There is no current replacement. Feel free to raise a discussion if you have a use case for this.
|
|
- `reqRef` and `reqSsrRef`, which were deprecated, have now been removed entirely. Follow the instructions below regarding [ssrRef](/docs/bridge/nuxt3-compatible-api#ssrref-and-shallowssrref) to replace this.
|
|
|
|
### Set `bridge.capi`
|
|
|
|
```ts
|
|
import { defineNuxtConfig } from '@nuxt/bridge'
|
|
|
|
export default defineNuxtConfig({
|
|
bridge: {
|
|
capi: true,
|
|
nitro: false // If migration to Nitro is complete, set to true
|
|
}
|
|
})
|
|
```
|
|
|
|
For each other composable you are using from `@nuxtjs/composition-api`, follow the steps below.
|
|
|
|
### useFetch
|
|
|
|
`$fetchState` and `$fetch` have been removed.
|
|
|
|
```diff
|
|
const {
|
|
- $fetch,
|
|
- $fetchState,
|
|
+ fetch,
|
|
+ fetchState,
|
|
} = useFetch(() => { posts.value = await $fetch('/api/posts') })
|
|
```
|
|
|
|
### `defineNuxtMiddleware`
|
|
|
|
This was a type-helper stub function that is now removed.
|
|
|
|
Remove the `defineNuxtMiddleware` wrapper:
|
|
|
|
```diff
|
|
- import { defineNuxtMiddleware } from '@nuxtjs/composition-api`
|
|
- export default defineNuxtMiddleware((ctx) => {})
|
|
+ export default (ctx) => {}
|
|
```
|
|
|
|
For typescript support, you can use `@nuxt/types`:
|
|
|
|
```ts
|
|
import type { Middleware } from '@nuxt/types'
|
|
|
|
export default <Middleware> function (ctx) { }
|
|
```
|
|
|
|
### `defineNuxtPlugin`
|
|
|
|
This was a type-helper stub function that is now removed.
|
|
|
|
You may also keep using Nuxt 2-style plugins, by removing the function (as with [defineNuxtMiddleware](#definenuxtmiddleware)).
|
|
|
|
Remove the `defineNuxtPlugin` wrapper:
|
|
|
|
```diff
|
|
- import { defineNuxtPlugin } from '@nuxtjs/composition-api'
|
|
- export default defineNuxtPlugin((ctx, inject) => {})
|
|
+ export default (ctx, inject) => {}
|
|
```
|
|
|
|
For typescript support, you can use `@nuxt/types`:
|
|
|
|
```ts
|
|
import type { Plugin } from '@nuxt/types'
|
|
|
|
export default <Plugin> function (ctx, inject) {}
|
|
```
|
|
|
|
::alert{type="warning"}
|
|
While this example is valid, Nuxt 3 introduces a new defineNuxtPlugin function that has a slightly different signature.
|
|
::
|
|
|
|
:ReadMore{link="/docs/guide/directory-structure/plugins#creating-plugins"}
|
|
|
|
### `useRouter` and `useRoute`
|
|
|
|
Nuxt Bridge provides direct replacements for these composables via [`useRouter`](/docs/api/composables/use-router) and `useRoute`.
|
|
|
|
The only key difference is that [`useRoute`](/docs/api/composables/use-route) no longer returns a computed property.
|
|
|
|
```diff
|
|
- import { useRouter, useRoute } from '@nuxtjs/composition-api'
|
|
|
|
const router = useRouter()
|
|
const route = useRoute()
|
|
|
|
- console.log(route.value.path)
|
|
+ console.log(route.path)
|
|
```
|