/pinia

🍍 Intuitive, type safe, light and flexible Store for Vue using the composition api with DevTools support

Primary LanguageTypeScriptMIT LicenseMIT

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Pinia

Intuitive, type safe and flexible Store for Vue

  • πŸ’‘ Intuitive
  • πŸ”‘ Type Safe
  • βš™οΈ Devtools support
  • πŸ”Œ Extensible
  • πŸ— Modular by design
  • πŸ“¦ Extremely light

Pinia works both for Vue 2.x and Vue 3.x. It requires Vue 2 with the latest @vue/composition-api or Vue ^3.2.0-0.

Pinia is the most similar English pronunciation of the word pineapple in Spanish: piΓ±a. A pineapple is in reality a group of individual flowers that join together to create a multiple fruit. Similar to stores, each one is born individually, but they are all connected at the end. It's also a delicious tropical fruit indigenous to South America.

Help me keep working on this project πŸ’š

Gold Sponsors

VueJobs

Silver Sponsors

VueMastery Prefect

Bronze Sponsors

Stanislas Ormières Antony Konstantinidis Storyblok NuxtJS


FAQ

A few notes about the project and possible questions:

Q: Is Pinia the successor of Vuex?

A: Yes

Q: What about dynamic modules?

A: Dynamic modules are not type safe, so instead we allow creating different stores that can be imported anywhere

Roadmap / Ideas

  • Should the state be merged at the same level as actions and getters?
  • Allow grouping stores together into a similar structure and allow defining new getters (pinia) You can directly call useOtherStore() inside of a getter or action.
  • Getter with params that act like computed properties (@ktsn) Can be implement through a custom composable and passed directly to state.

Installation

yarn add pinia
# or with npm
npm install pinia

If you are using Vue 2, make sure to install latest @vue/composition-api:

npm install pinia @vue/composition-api

Usage

Install the plugin

Create a pinia (the root store) and pass it to app:

import { createPinia } from 'pinia'

app.use(createPinia())

Create a Store

You can create as many stores as you want, and they should each exist in different files:

import { defineStore } from 'pinia'

// main is the name of the store. It is unique across your application
// and will appear in devtools
export const useMainStore = defineStore('main', {
  // a function that returns a fresh state
  state: () => ({
    counter: 0,
    name: 'Eduardo',
  }),
  // optional getters
  getters: {
    // getters receive the state as first parameter
    doubleCount: (state) => state.counter * 2,
    // use getters in other getters
    doubleCountPlusOne(): number {
      return this.doubleCount + 1
    },
  },
  // optional actions
  actions: {
    reset() {
      // `this` is the store instance
      this.counter = 0
    },
  },
})

defineStore returns a function that has to be called to get access to the store:

import { useMainStore } from '@/stores/main'
import { storeToRefs } from 'pinia'

export default defineComponent({
  setup() {
    const main = useMainStore()

    // extract specific store properties
    const { counter, doubleCount } = storeToRefs(main)

    return {
      // gives access to the whole store in the template
      main,
      // gives access only to specific state or getter
      counter,
      doubleCount,
    }
  },
})

Documentation

To learn more about Pinia, check its documentation.

License

MIT