vuex和pinia的区别

1. pinia没有mutations,只有：state、getters、actions；
2. pinia分模块不需要modulles（之前vuex分模块需要modules）
3. pinia体积更小（性能更好）;
4. pinia可以直接修改state数据；

一、安装使用

1、安装下载

npm install pinia 
# or 
yarn add pinia

2、main.js引入

import {createPinia} from 'pinia' app.use(createPinia())

3、根目录创建store/index.js中写入

import {defineStore} from "pinia"
export const userStore = defineStore("",{state:()=>{return{count:0}},getters:{},actions:{}
})

4、组件使用

<script setup> import {userStore} from '../store' const store = userStore() </script>

5、修改stroe中的数据

<script setup>import {storeToRefs} from 'pinia'const store = userStore()const {count,name} = storeToRefs(store)const changeName = () =>{name.value = 'wanjun'}
<script >

import {defineStore} from "pinia"
export const userStore = defineStore("storeId",{state:()=>{return{count:0,name:'z55'}},getters:{changeNum(){return this.count +100}},// 支持同步、异步actions:{upNum(val){this.count += val}}
})

二、pinia持久化存储

1、安装插件

npm i pinia-plugin-persist --save

2、store/index.js

import {createPinia} from 'pinia'
// 引入pinia持久化存储插件
import piniaPluginPersist from 'pinia-plugin-persist'const store = createPinia()
//使用插件
store.use(piniaPluginPersist)
export default store

3、在main.js中引入

reateApp} from 'vue'
import App from '@/App.vue'
import {createPinia} from 'pinia'
import store from "@/store/index";
const app = createApp(App)
// 1.createPinia()、2.store有先后顺序
app.use(createPinia())
app.use(store)
app.mount('#app')

store/user.js 本地保存

// 开启数据缓存
persist:{enabled:true,strategies:[{key:'xiao',storage:localStorage}],paths:[]
}