yarn add pinia
# 或使用npm
npm install pinia

import { createPinia } from "pinia"

// 創(chuàng)建 Pinia 實(shí)例
const pinia  = createPinia()

// 導(dǎo)出 Pinia 實(shí)例以便將其與應(yīng)用程序?qū)嵗P(guān)聯(lián)
export default pinia

import { createApp } from 'vue'
import './style.css'
import App from './App.vue'
import router from './router/router'
import store from './store/index'

createApp(App)
    .use(router)
    .use(store)
    .mount('#app')

import { defineStore } from "pinia"

export const useUserStore = defineStore({
    //id 是為了更好地區(qū)分模塊
    id: 'user',
    state: () => ({
        name: 'Tony',
        age: 18,
        count: 0
    }),
    getters: {
        doubleCount: (state) => state.count * 2,
    },
    actions: {
        // 定義操作或異步請(qǐng)求
        increment() {
            // 這里訪問state的數(shù)據(jù)不再是state.XXX，而是通過(guò)this
            this.count++
        }
    }
})

<template>
  <div>
    <h3>我是測(cè)試pinia狀態(tài)存儲(chǔ)的組件，我有一個(gè)子組件</h3>
    <div>userStore里的state數(shù)據(jù)：</div>
    <span>姓名： {{ name }}</span>   <span>年齡： {{ age }}</span>
    <div><button @click="handleIncre">修改count:</button>count: {{ count }}</div>
    <!-- 直接調(diào)用getters的方法 -->
    <div> Double count is: {{ doubleCount }}</div>
  </div>
</template>

<script setup>
import { ref, reactive } from 'vue'
import TestChild1 from './component/TestChild1.vue'
import { useUserStore } from '../../store/user';
import { storeToRefs } from 'pinia'

const userStore = useUserStore()
// 通過(guò)storeToRefs包裹，解構(gòu)出來(lái)的屬性/方法才有響應(yīng)式
const { name, age, count,  doubleCount} = storeToRefs(userStore)
// console.log('userStore:', userStore.name, userStore.age, userStore.count)
// console.log(name.value, age.value, count.value);

// 調(diào)用store的actions的increment方法
const handleIncre = () => {
    userStore.increment()
}

</script>

// 模擬異步登錄獲取用戶信息
const loginUser = () => {
    return new Promise((resolve, reject) => {
        setTimeout(() => {
            resolve({
                name: 'Tony',
                age: 18
            })
        }, 2000)
    })
}

export default {
    loginUser
}

import { defineStore } from "pinia"
import API from '../api/index'

export const useUserStore = defineStore({
    //id 是為了更好地區(qū)分模塊
    id: 'user',
    state: () => ({
        name: 'Tony',
        age: 18,
        count: 0,
        userInfo: {}
    }),
    getters: {
        doubleCount: (state) => state.count * 2,
    },
    actions: {
        // 定義操作或異步請(qǐng)求
        increment() {
            // 這里訪問state的數(shù)據(jù)不再是state.XXX，而是通過(guò)this
            this.count++
        },
        // 在actions中異步獲取loginUser的數(shù)據(jù)
        async getUserInfo() {
            this.userInfo = await API.loginUser()
            console.log('user-info', this.userInfo);
        }
    }
})

<!-- 點(diǎn)擊---異步登錄獲取userInfo -->
    <button @click="getUser">異步登錄獲取userInfo</button>
    <div>userInfo: {{ userInfo }}</div>

// 調(diào)用store的actions的getUserInfo方法異步獲取用戶登錄信息
const getUser = () => {
  userStore.getUserInfo()
}