Pinia

https://pinia.vuejs.org/

Pinia is a state management library for Vue.js applications. It provides a simple and efficient way to manage the state of your Vue.js components, with a focus on reactivity and scalability. It is specifically designed to work seamlessly with the Vue 3 composition API.

Key features and aspects of Pinia include:

1. Reactivity: Pinia leverages Vue 3's reactivity system to manage state changes in a reactive and efficient manner. This ensures that your components automatically update when the state changes.

2. Vue 3 Composition API: Pinia is built to take full advantage of Vue 3's Composition API, which allows developers to organize and reuse logic more effectively in their components.

3. Store Pattern: Pinia uses a store pattern for managing state. Stores in Pinia are instances of the Store class, providing a structured and modular way to handle different parts of your application's state.

4. No Dependencies: Pinia is designed to be lightweight and has no external dependencies. This simplicity makes it easy to integrate into your Vue.js projects without introducing unnecessary complexity.

5. Devtools Integration: Pinia integrates with the Vue Devtools, providing a convenient way to inspect and debug your application's state and mutations.

6. TypeScript Support: Pinia has good TypeScript support, allowing developers to define strong types for their state and ensuring better code quality and editor support.

Here's a simple example of creating a Pinia store:

import { createPinia } from 'pinia';

// Create a Pinia store
const pinia = createPinia();

export const useCounterStore = pinia.defineStore('counter', {
  state: () => ({
    count: 0,
  }),
  actions: {
    increment() {
      this.count++;
    },
    decrement() {
      this.count--;
    },
  },
});

And in a Vue component:

<template>
  <div>
    <p>Count: {{ $store.counter.count }}</p>
    <button @click="$store.counter.increment">Increment</button>
    <button @click="$store.counter.decrement">Decrement</button>
  </div>
</template>

<script>
import { useCounterStore } from './path-to-your-store';

export default {
  setup() {
    const counterStore = useCounterStore();
    return { $store: counterStore };
  },
};
</script>

Note that the details provided here are based on the state of Pinia as of January 2022, and there may have been updates or changes since then. It's always a good idea to check the official documentation or repository for the latest information and features.

Links

Pinia Source
Getting started