Nuxt

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Using Pinia with Nuxt is easier since Nuxt takes care of a lot of things when it comes to server side rendering. For instance, you don't need to care about serialization nor XSS attacks. Pinia supports Nuxt 3 and 4.

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RuleKit

Installation

npx nuxi@latest module add pinia

This will add both @pinia/nuxt and pinia to your project. If you notice that pinia is not installed, please install it manually with your package manager: npm i pinia.

TIP

If you're using npm, you might encounter an ERESOLVE unable to resolve dependency tree error. In that case, add the following to your package.json:

"overrides": {
  "vue": "latest"
}

We supply a module to handle everything for you, you only need to add it to modules in your nuxt.config.js file:

// nuxt.config.js
export default defineNuxtConfig({
  // ... other options
  modules: [
    // ...
    '@pinia/nuxt',
  ],
})

And that's it, use your store as usual!

Awaiting for actions in pages

As with onServerPrefetch(), you can call a store action within the callOnce() composable. This will allow Nuxt to run the action only once and avoids refetching data that is already present.

<script setup>
const store = useStore()
// we could also extract the data, but it's already present in the store
await callOnce('user', () => store.fetchUser())
</script>

Depending on your requirements, you can choose to run the action only once on the client, or on every navigation (which is closer to data fetching behavior of useFetch()/useAsyncData())

<script setup>
const store = useStore()
await callOnce('user', () => store.fetchUser(), { mode: 'navigation' })
</script>

TIP

If you want to use a store outside of setup() or an injection aware context (e.g. Navigation guards, other stores, Nuxt Middlewares, etc), remember to pass the pinia instance to useStore(), for the reasons alluded to here. Retrieving the pinia instance might vary.

import { useStore } from '~/stores/myStore'

// this line is usually inside a function that is able to retrieve
// the pinia instance
const store = useStore(pinia)

Fortunately, most of the time you don't need to go through this hassle.

Auto imports

By default @pinia/nuxt exposes a few auto imports:

• usePinia(), which is similar to getActivePinia() but works better with Nuxt.
• defineStore() to define stores
• storeToRefs() when you need to extract individual refs from a store
• acceptHMRUpdate() for hot module replacement

It also automatically imports all stores defined within your stores folder (app/stores in Nuxt 4). It doesn't lookup for nested stores though. You can customize this behavior by setting the storesDirs option:

// nuxt.config.ts
export default defineNuxtConfig({
  // ... other options
  modules: ['@pinia/nuxt'],
  pinia: {
    storesDirs: ['./stores/**', './custom-folder/stores/**'],
  },
})

Note the folders are relative to the root of your project. If you change the srcDir option, you need to adapt the paths accordingly.