Nuxt•7d ago

How to make state management in NuxtJS3

Hello everyone, can anyone help me out about how we can make state management by using pinia in the best way or practice?

5 Replies

kapa.ai•7d ago

Hi @Adnan Erlansyah. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- To implement state management using Pinia in Nuxt 3, you can follow these best practices: 1. Install the Pinia module: First, install the @pinia/nuxt module using:

npx nuxi@latest module add pinia

npx nuxi@latest module add pinia

2. Configure Nuxt to use Pinia: In your nuxt.config.ts file, add Pinia to the modules:

export default defineNuxtConfig({
  modules: ['@pinia/nuxt']
})

export default defineNuxtConfig({
  modules: ['@pinia/nuxt']
})

3. Create your store: Create a new file in the stores directory, for example stores/user.ts:

import { defineStore } from 'pinia'

export const useUserStore = defineStore('user', () => {
  const user = useStorage('user', { name: 'John Doe' })

  return {
    user
  }
})

import { defineStore } from 'pinia'

export const useUserStore = defineStore('user', () => {
  const user = useStorage('user', { name: 'John Doe' })

  return {
    user
  }
})

4. Use the store in your components: Import and use the store in your components:

<script setup>
import { useUserStore } from 'stores/user.js'

const userStore = useUserStore()
</script>

<template>
  <div>{{ userStore.user.name }}</div>
</template>

<script setup>
import { useUserStore } from 'stores/user.js'

const userStore = useUserStore()
</script>

<template>
  <div>{{ userStore.user.name }}</div>
</template>

This approach allows you to create reactive and SSR-friendly shared state across your Nuxt 3 application using Pinia. Nuxt 3 State Management (https://nuxt.com/docs/getting-started/state-management#usage-with-pinia) provides more detailed information on using Pinia with Nuxt 3. Remember that Pinia stores need to be imported and used in a component for them to appear in the devtools. If you're having trouble seeing your store in the devtools, make sure you're actually using it in a component. For more advanced usage, you can create composables to define global type-safe states and import them across your app. This can be particularly useful for shared state management. Nuxt 3 Advanced Usage (https://nuxt.com/docs/getting-started/state-management#advanced-usage) By following these practices, you can effectively implement state management in your Nuxt 3 application using Pinia. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•7d ago

<@1079709612078534676> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

Adnan ErlansyahOP•7d ago

@kapa.ai how about if we want to mutate or change the data or manipulate them.

kapa.ai•7d ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- To mutate, change, or manipulate data in a Pinia store within a Nuxt 3 application, you can use actions and mutations. Here's how you can do it: 1. Define actions in your store: Actions are methods that can contain any arbitrary logic, including asynchronous operations. They're used to mutate the state.

import { defineStore } from 'pinia'

export const useUserStore = defineStore('user', {
  state: () => ({
    name: 'John Doe',
    age: 30
  }),
  actions: {
    updateName(newName: string) {
      this.name = newName
    },
    incrementAge() {
      this.age++
    },
    async fetchUserData() {
      const response = await fetch('/api/user')
      const userData = await response.json()
      this.name = userData.name
      this.age = userData.age
    }
  }
})

import { defineStore } from 'pinia'

export const useUserStore = defineStore('user', {
  state: () => ({
    name: 'John Doe',
    age: 30
  }),
  actions: {
    updateName(newName: string) {
      this.name = newName
    },
    incrementAge() {
      this.age++
    },
    async fetchUserData() {
      const response = await fetch('/api/user')
      const userData = await response.json()
      this.name = userData.name
      this.age = userData.age
    }
  }
})

2. Use the actions in your components:

<script setup>
import { useUserStore } from '~/stores/user'

const userStore = useUserStore()

function changeName() {
  userStore.updateName('Jane Doe')
}

function makeUserOlder() {
  userStore.incrementAge()
}

function loadUserData() {
  userStore.fetchUserData()
}
</script>

<template>
  <div>
    <p>Name: {{ userStore.name }}</p>
    <p>Age: {{ userStore.age }}</p>
    <button @click="changeName">Change Name</button>
    <button @click="makeUserOlder">Increment Age</button>
    <button @click="loadUserData">Load User Data</button>
  </div>
</template>

<script setup>
import { useUserStore } from '~/stores/user'

const userStore = useUserStore()

function changeName() {
  userStore.updateName('Jane Doe')
}

function makeUserOlder() {
  userStore.incrementAge()
}

function loadUserData() {
  userStore.fetchUserData()
}
</script>

<template>
  <div>
    <p>Name: {{ userStore.name }}</p>
    <p>Age: {{ userStore.age }}</p>
    <button @click="changeName">Change Name</button>
    <button @click="makeUserOlder">Increment Age</button>
    <button @click="loadUserData">Load User Data</button>
  </div>
</template>

In this example, we've defined three actions: updateName, incrementAge, and fetchUserData. These actions can be called from any component that uses the store, allowing you to mutate the state in a controlled manner. For more complex state mutations, you can also use getters to compute derived state:

import { defineStore } from 'pinia'
export const useUserStore = defineStore('user', {
  state: () => ({
    firstName: 'John',
    lastName: 'Doe'
  }),
  getters: {
    fullName: (state) => `${state.firstName} ${state.lastName}`
  },
  actions: {
    updateFirstName(name: string) {
      this.firstName = name
    },
    updateLastName(name: string) {
      this.lastName = name
    }
  }
})

import { defineStore } from 'pinia'
export const useUserStore = defineStore('user', {
  state: () => ({
    firstName: 'John',
    lastName: 'Doe'
  }),
  getters: {
    fullName: (state) => `${state.firstName} ${state.lastName}`
  },
  actions: {
    updateFirstName(name: string) {
      this.firstName = name
    },
    updateLastName(name: string) {
      this.lastName = name
    }
  }
})

This approach allows you to maintain a clean and predictable state management pattern in your Nuxt 3 application using Pinia. For more detailed information on state management and mutations in Nuxt 3 with Pinia, you can refer to the Nuxt 3 State Management documentation (https://nuxt.com/docs/getting-started/state-management#usage-with-pinia). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•7d ago

<@1079709612078534676> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

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How to make state management in NuxtJS3