import { defineStore } from 'pinia' //引入pinia
 
//這里官網(wǎng)是單獨(dú)導(dǎo)出  是可以寫(xiě)成默認(rèn)導(dǎo)出的  官方的解釋為大家一起約定倉(cāng)庫(kù)用use打頭的單詞 固定統(tǒng)一小倉(cāng)庫(kù)的名字不易混亂
export const useCar=defineStore("test",{ 
	state: () =>{
		return  ({
			msg:"這是pinia的數(shù)據(jù)",
			name:"小獅子",
			age:18
			}) //為了避免出錯(cuò)，返回的值用()包起來(lái)
	} 
})

import { createApp } from 'vue'
import App from './App.vue'
 
const app=createApp(App)
import { createPinia } from 'pinia' //引入pinia
app.use(createPinia())
 
app.mount('#app') 

<template>
	<h1>aaa--{{store.msg}}----{{store.name}}--{{store.age}}</h1>
	<button @click="change1">修改store.name</button>
	<router-view></router-view>
	
</template>
 
<script setup>
	import {useCar} from "../store/index.js" //將之前配置的pinia文件夾中的index.js文件引入
	let store=useCar() //接收
	 console.log(store)
 
	let change1=()=>{
		store.name="小羊" //修改pinia里面的數(shù)據(jù)
        console.log(store.name)
	}
	    
	    
</script>
 
<style scoped>
	h1{
		width: 400px;
	    height:200px;
		background-color:deeppink;
	}
</style>

<template>
	<h1>aaa--{{store.msg}}----{{store.name}}--{{store.age}}</h1>
	<button @click="change1">修改store.name</button>
	<button @click="reset">reset</button>
	<router-view></router-view>
	
</template>
 
<script setup>
	import {useCar} from "../store/car.js"
	let store=useCar()
	 console.log(store)
	let change1=()=>{
		store.name="小羊"
		console.log(store.name)
	}
	
	let reset=()=>{ //初始化pinia數(shù)據(jù)
		store.$reset()
	}
	    
	   
</script>
 
<style scoped>
	h1{
		width: 400px;
	    height:200px;
		background-color:deeppink;
	}
</style>

<template>
	<h1>aaa--{{store.msg}}----{{store.name}}--{{store.age}}</h1>
	<button @click="change1">修改store.name</button>
	<button @click="reset">reset</button>
	<button @click="fn">fn</button>
	<router-view></router-view>
	
</template>
 
<script setup>
	import {useCar} from "../store/car.js"
	let store=useCar()
	 console.log(store)
	let change1=()=>{
		store.name="小羊"
		console.log(store.name)
	}
	
	let reset=()=>{ //重置
		store.$reset()
	}
	
	function fn(){
		//批量修改
		store.$patch({
		  name:"小羊",
		  age:20,
		})
	}
	   
</script>
 
<style scoped>
	h1{
		width: 400px;
	    height:200px;
		background-color:deeppink;
	}
</style>

//可以通過(guò) store 的 $subscribe() 方法查看狀態(tài)及其變化,通過(guò)patch修改狀態(tài)時(shí)就會(huì)觸發(fā)一次
store.$subscribe((mutation, state) => { 
  // 每當(dāng)它發(fā)生變化時(shí)，將整個(gè)狀態(tài)持久化到本地存儲(chǔ)
  localStorage.setItem('test', JSON.stringify(state))
})

//store/index.js文件
export const useStore = defineStore('main', {
  state: () => ({
    counter: 0,
  }),
  getters: {
    doubleCount: (state) => state.counter * 2,
  },
})
 
//組件中直接使用:  <p>Double count is {{ store.doubleCount }}</p>

export const useStore = defineStore('main', {
  state: () => ({
    counter: 0,
  }),
  actions: {
    increment() {
      this.counter++//1.有this
    },
    randomizeCounter(state) {//2.有參數(shù)   想用哪個(gè)用哪個(gè)
      state.counter = Math.round(100 * Math.random())
    },
    randomizeCounter(state) {
        //異步函數(shù)
        axios("/test").then(res=>{
             state.counter = res.data.length
        })
     
    }
  },
})
 
//組件中的使用:
  setup() {
    const store = useStore()
    store.increment()
    store.randomizeCounter()
  }